MD1501 SeriesAuxiliary Relay Instruction Manual NR Electric Co., Ltd. Preface Preface Introduction This guide and the relevant operating or service manual documentation for the equipment provide full information on safe handling, commissioning and testing of this equipment. Documentation for equipment ordered from NR is dispatched separately from manufactured goods and may not be received at the same time. Therefore, this guide is provided to ensure that printed information normally present on equipment is fully understood by the recipient. Before carrying out any work on the equipment, the user should be familiar with the contents of this manual, and read relevant chapter carefully. This chapter describes the safety precautions recommended when using the equipment. Before installing and using the equipment, this chapter must be thoroughly read and understood. Health and Safety The information in this chapter of the equipment documentation is intended to ensure that equipment is properly installed and handled in order to maintain it in a safe condition. When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger personnel and equipment and cause personal injury or physical damage. Before working in the terminal strip area, the equipment must be isolated. Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage, installation and commissioning, and on careful operation, maintenance and servicing. For this reason, only qualified personnel may work on or operate the equipment. Qualified personnel are individuals who: Are familiar with the installation, commissioning, and operation of the equipment and of the system to which it is being connected; Are able to safely perform switching operations in accordance with accepted safety engineering practices and are authorized to energize and de-energize equipment and to isolate, ground, and label it; Are trained in the care and use of safety apparatus in accordance with safety engineering practices; Are trained in emergency procedures (first aid). Instructions and Warnings The following indicators and standard definitions are used: MD1501 Series Auxiliary Relay i Date: 2013-01-04 Preface DANGER! It means that death, severe personal injury, or considerable equipment damage will occur if safety precautions are disregarded. WARNING! It means that death, severe personal, or considerable equipment damage could occur if safety precautions are disregarded. CAUTION! It means that light personal injury or equipment damage may occur if safety precautions are disregarded. This particularly applies to damage to the device and to resulting damage of the protected equipment. WARNING! The firmware may be upgraded to add new features or enhance/modify existing features, please make sure that the version of this manual is compatible with the product in your hand. WARNING! During operation of electrical equipment, certain parts of these devices are under high voltage. Severe personal injury or significant equipment damage could result from improper behavior. Only qualified personnel should work on this equipment or in the vicinity of this equipment. These personnel must be familiar with all warnings and service procedures described in this manual, as well as safety regulations. In particular, the general facility and safety regulations for work with high-voltage equipment must be observed. Noncompliance may result in death, injury, or significant equipment damage. WARNING! Exposed terminals Do not touch the exposed terminals of this equipment while the power is on, as the high voltage generated is dangerous Residual voltage Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It takes a few seconds for the voltage to discharge. ii MD1501 Series Auxiliary Relay Date: 2013-01-04 Preface CAUTION! Earth The earthing terminal of the equipment must be securely earthed Operating environment The equipment must only be used within the range of ambient environment detailed in the specification and in an environment free of abnormal vibration. Ratings Before applying AC voltage and current or the DC power supply to the equipment, check that they conform to the equipment ratings. Printed circuit board Do not attach and remove printed circuit boards when DC power to the equipment is on, as this may cause the equipment to malfunction. External circuit When connecting the output contacts of the equipment to an external circuit, carefully check the supply voltage used in order to prevent the connected circuit from overheating. Connection cable Carefully handle the connection cable without applying excessive force. Copyright Version: R1.01 NR ELECTRIC CO., LTD. 69 Suyuan Avenue. Jiangning, Nanjing 211102, China P/N: EN_CZXL1501.0086.0002 Tel: +86-25-87178185, Fax: +86-25-87178208 Website: www.nrelect.com, www.nari-relays.com Copyright © NR 2013. All rights reserved Email:
[email protected] We reserve all rights to this document and to the information contained herein. Improper use in particular reproduction and dissemination to third parties is strictly forbidden except where expressly authorized. The information in this manual is carefully checked periodically, and necessary corrections will be included in future editions. If nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated. We reserve the rights to make technical improvements without notice. MD1501 Series Auxiliary Relay iii Date: 2013-01-04 iv MD1501 Series Auxiliary Relay Date: 2013-01-04 . A guide to the mechanical and electrical installation of this relay is also provided. 8 Manual Version History List the instruction manual version and the modification history records. All contents provided by this manual are summarized as below: 1 Introduction Briefly introduce the application. type tests and the certifications that our products have passed. 2 Technical Data Introduce the technical data about MD1501 series auxiliary relays. 7 Decommissioning and Disposal A general decommissioning and disposal policy for the relay is outlined. mechanical specifications. handling. 3 Operation Theory Introduce a detailed functional description of each auxiliary relay. such as electrical specifications. comprising checks on the calibration and functionality of the relay. 5 Commissioning Introduce how to commission the relay. 4 Installation Introduce the recommendations on unpacking. functions and features about MD1501 series auxiliary relays. ambient temperature and humidity range. incorporating earthing recommendations. 6 Maintenance A general maintenance policy for the relay is outlined. inspection and storage of the relay.Preface Documentation Structure The manual provides a functional and technical description of this relay and a comprehensive set of instructions for the use and application of MD1501 series auxiliary relays. ...............1 Application...................... 1-a 1................................................................................................................................................................................................2 Function ............... 1 Introduction 1 Introduction Table of Contents 1 Introduction................................................................................. 1-1 1.........................4 Type .... 1-1 1............................... 1-1 MD1501 Series Auxiliary Relay 1-a Date: 2013-01-04 .............................................................................................................................3 Features ... 1-1 1........ 1 Introduction 1-b MD1501 Series Auxiliary Relay Date: 2013-01-04 . 3 Features Types of relay of dedicated function are available and can be flexible combined to meet with requirement of various applications. 1. high-resistance and small power consumption relays are used. Each relay is independent from each other with high configurability and extensibility. Adaptive mounting modes.4 Type MD1501 series auxiliary relays can be classified in following types according to their functions. hence the security of relay is increased.1 Application MD1501 series auxiliary relays are of various functions mainly used with main protection and control device in modular design. power consumption and heat dissipation are greatly reduced and moisture proof is improved.2 Function MD1501 series auxiliary relays provide functions as follows: Trip circuit supervision Lockout function Tripping relay function Repeat relay function (voltage operated or current operated) AC voltage switching function 1. More spare relays can be provided and flexible applied. Relay types are continuously developed in order to meet the requirement of various applications. High burden of the relay for tripping or closing circuit breaker has strong interference withstand capability. 1.4-1 Types of MD1501 series auxiliary relay Type Applications MD1501-551 Trip circuit supervision with current operated auxiliary relay MD1501-552 Phase segregated trip circuit supervision MD1501-556 Current operated auxiliary relay (3 elements) MD1501-561 Bi-stable switching relay MD1501-571 Electrical reset auxiliary element with internal operating coil supervision (high burden) MD1501 Series Auxiliary Relay 1-1 Date: 2013-01-04 . Table 1. Each relay type is designed with specific function. the relay modules can be accommodated in a casing installed on a panel as a relay device. Completely-sealed. 1 Introduction 1. 1 Introduction MD1501-572 Self reset auxiliary relay with electrical reset LED indicator (high burden) NOTE! Devices may be upgraded to amend or enhance functions. 1-2 MD1501 Series Auxiliary Relay Date: 2013-01-04 . please ensure that this manual version is compatible with your devices. ...................................2 Mechanical Specifications ................1 Electrical Specifications ................................................ 2-3 MD1501 Series Auxiliary Relay 2-a Date: 2013-01-16 ......................... 2-1 2...............................................................3 Ambient Temperature and Humidity Range ................................................................................................................ 2-1 2.................................................. 2-2 2............................. 2 Technical Data 2 Technical Data Table of Contents 2 Technical Data.. 2-1 2. 2-a 2....4 Type Tests ...........6 Main Technical Data of Each Relay...................................... 2-1 2.....................................5 Certifications ............................................................................................ 2 Technical Data 2-b MD1501 Series Auxiliary Relay Date: 2013-01-16 . IEC 60255-11:1979 Quiescent condition < 6W Burden Operating condition < 120W 2.1 Electrical Specifications Power Supply (Voltage Operated Element) Rated Voltage 110Vdc. 1kg Housing material Aluminum.5×173. 250Vdc Variation (80%~120%)Un Ripple in the DC auxiliary voltage Max 15% of the DC value.2 Mechanical Specifications Enclosure dimensions (W×H×D) 35. without condensation 2. high temperature +55°C 2. M3 screw Mounting Flush mounted Weight per relay Approx.4 Type Tests 2. low Damp heat test. cyclic temperature -25°C. connection terminals IP20 2. 2 Technical Data 2. 220Vdc.2 Mechanical Tests Vibration IEC60255-21-1:1988 Class I Shock and bump IEC 60255-21-2:1988 Class I MD1501 Series Auxiliary Relay 2-1 Date: 2013-01-16 . 125Vdc. steel Housing color Silver grey Location of terminal Back side Enclosure Protection IEC60529:1989 Front side IP40 Other sides IP40 Rear side.8×198 (unit: mm) Trepanning dimensions (W×H) 36.4.3 Ambient Temperature and Humidity Range Standard IEC 60255-6:1988 Operating temperature -25°C~+55°C Transport and storage temperature -40°C~+70°C range Relative humidity 5%~95%.4.1 Environmental Tests Dry cold test IEC 60068-2-1:1974 Test Ad for 16 h at -25°C Dry heat test IEC 60068-2-2:1990 Test Bd for 16 h at +55°C IEC 60068-2-30:1980 Test Db Two (12+12) hour cycles 95%RH.4×154(unit: mm). I/O port: 4kV. 500Vdc 2. f=80~1000MHz Radio frequency interference tests Spot frequency Radiated amplitude-modulated 10V/m (rms). 5/50ns IEC 60255-22-5:2002 (idt IEC 61000-4-5:1995) class IV Surge immunity test Power supply.5 kHz. 1000A/m for 3s 2.source energy 0. Comm. Class V Immunity 100A/m for 1min.4. f=80MHz/160MHz/450MHz/900MHz Radiated pulse-modulated 10V/m (rms).5J Insulation resistance measurements IEC 60255-5:2000 Isolation resistance >100MΩ. 2 Technical Data 2.5 Certifications ISO9001: 2008 ISO14001:2004 OHSAS18001:2007 ISO10012:2003 CMMI L4 EMC: 2004/108/EC. AC input. Terminal: 10Vrms. EN50263:1999 2-2 MD1501 Series Auxiliary Relay Date: 2013-01-16 .2/50us Conducted RF Electromagnetic IEC 60255-22-6:2001. AC. I/O.3 Electrical Tests Dielectric tests IEC 60255-5:2000 Test voltage 2kV. 5/50ns Communication terminals: Class IV. 2.2/50μs. Earth: Class IV.4.0kV IEC 60255-22-3:2007 class III Frequency sweep Radiated amplitude-modulated 10V/m (rms). Class III Disturbance Power supply. unipolar impulses waveform Impulse voltage tests 1. 150 kHz~80MHz Power Frequency Magnetic Field IEC 61000-4-8:2001. 1. 4kV. 5 kHz. 2kV. line to earth. I/O. 1min IEC 60255-5:2000 Test voltage 5kV. f=900MHz IEC60255-22-2:1996 (idt IEC 61000-4-2:2006) class IV Electrostatic discharge test For contact discharge: 8kV For air discharge: 15kV IEC 60255-22-4:2002 (idt IEC 61000-4-4:2004) Fast transient disturbance tests Power supply.4 Electromagnetic Compatibility IEC 60255-22-1:1988 (idt IEC61000-4-12:1995) 1MHz burst disturbance test Common mode: class III 2.5kV Differential mode: class III 1. 50Hz. 2kV line to line. 2A@48Vdc. EN61010-1:2001 2.1-1 to change.1 Main Technical Data of Type MD1501-551 Trip circuit supervision relay 110Vdc: MD1501-551B 125Vdc: MD1501-551N Rated voltage 220Vdc: MD1501-551A 250Vdc: MD1501-551M Pickup voltage <80%Un 6mA: circuit breaker is closed. two normally open contacts Maximum voltage for contact 380Vac. 250Vdc Voltage withstand for normally open 1200Vac.5A@110Vdc. please refer to Table 3. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact
[email protected] Main Technical Data of Type MD1501-552 110Vdc: MD1501-552B Rated voltage 125Vdc: MD1501-552N MD1501 Series Auxiliary Relay 2-3 Date: 2013-01-16 . 0.
[email protected] are disconnect in default.6. 10A@3s Breaking capacity for contact 1. the current through relay K1 Current of supervision relay coil 4mA: circuit breaker is open.5A: the default value Rated voltage drop <2V Operating time <10ms Drop off delay <10ms Output contacts two normally open contacts Maximum voltage for contact 380Vac.2A~0.6. 0. the current through relay K1 and K2 Drop off delay 300ms Output contacts Two normally closed contacts.2A@48Vdc. 250Vdc Voltage withstand for normally open 1200Vac.6 Main Technical Data of Each Relay 2.5A@110Vdc. 10A@3s Breaking capacity for contact 1.1-1 are short-circuit in Input current default. 2 Technical Data Products safety(PS): 2006/95/EC.5s.25A@220Vdc (L/R=40ms) 2.5s. S3 and S4 in Figure 3. Pickup current 0. 0.25A@220Vdc (L/R=40ms) Current operated relay 1A~8A: adaptive. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact 50A@200ms. 20A@0. 0. S1 and S2 in Figure 3. 0. S23 and S24. two normally open contacts per group Maximum voltage for contact 380Vac.5A@110Vdc. 2 Technical Data 220Vdc: MD1501-552A 250Vdc: MD1501-552M Pickup voltage <80%Un 6mA: circuit breaker is closed.5s. 0. S13 and
[email protected]. K3 and K4 or K5 and K6 Drop off delay 300ms Output contacts two normally closed contacts. 0. the current through relay K1 and K2.25A@220Vdc (L/R=40ms) 2. K2 or K3 Current of supervision relay coil 4mA: circuit breaker is open. two normally open contacts Maximum voltage for contact 380Vac.2A@48Vdc. S31 and S32 in Figure 3.2A@48Vdc. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact 50A@200ms. 20A@0. S21 and S22.3-1 are disconnect in default.3-1 to change. please refer to Table 3. 250Vdc Voltage withstand for normally open 1200Vac.2A~0. the current through relay K1. 0. 250Vdc Voltage withstand for normally open 1200Vac.6. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact
[email protected]@220Vdc (L/R=40ms) 2.4 Main Technical Data of Type MD1501-561 110Vdc: MD1501-561B 125Vdc: MD1501-561N Rated voltage 220Vdc: MD1501-561A 250Vdc: MD1501-561M Pickup voltage <80%Un Operating time <10ms Reset time <10ms 2-4 MD1501 Series Auxiliary Relay Date: 2013-01-16 . 10A@3s Breaking capacity for contact 1.5A: the default value Rated voltage drop <2V Operating time <10ms Drop off delay <10ms Output contacts 3 groups.3 Main Technical Data of Type MD1501-556 Current operated relay 1A~8A: adaptive.3-1 are short-circuit in default. S11 and S12. S33 Input current and S34 in Figure 3. 20A@0. 10A@3s Breaking capacity for contact 1. Pickup current 0. one group of signal contact Maximum voltage for contact 380Vac. 125Vdc Current of supervision relay coil 1. the relay does not operate Rated power consumption <120W: the moment that the relay operates <6W: the relay operates but the initiation contact is still closed Pickup voltage 55%Un~70%Un >25W: 220Vdc. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact
[email protected]@220Vdc (L/R=40ms) NOTE! Please ensure the state of bi-stable relays matches with site current status when put in service.5A@110Vdc. one group of signal contact Maximum voltage for contact 380Vac. 20A@0. 250Vdc Voltage withstand for normally open 1200Vac.5s.2A@48Vdc. 10A@3s Breaking capacity for contact 1.5mA Operating time Maximum value: 10ms.5A@110Vdc. 250Vdc Pickup power >9W: 110Vdc.25A@220Vdc (L/R=40ms) MD1501 Series Auxiliary Relay 2-5 Date: 2013-01-16 . 10A@3s Breaking capacity for contact 1. 250Vdc Voltage withstand for normally open 1200Vac. typical value: 6ms Reset time <15ms Ten groups of electrical reset relay (9 normally open contacts and 1 normally closed contact). 2 Technical Data Output contacts 4 groups of switching contacts. 20A@0. 0. 0.6.5s.5 Main Technical Data of Type MD1501-571 High burden electrical reset auxiliary relay: 110Vdc: MD1501-571B 125Vdc: MD1501-571N Rated voltage 220Vdc: MD1501-571A 250Vdc: MD1501-571M <2W: normally operating condition. 2. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact 50A@200ms. one group of signal contact Output contacts Eight groups of electrical reset relay (6 normally open contacts and 2 normally closed contacts).2A@48Vdc. 0. 0. the power is larger at the moment of operating. in fact.5mA Operating time Maximum value: 10ms. 20A@0. users maybe gradually increase the DC voltage subject to the relay under non-operating state.25A@220Vdc (L/R=40ms) NOTE! For the relay. When testing the relay.5s. and the power is less after the operating. in fact. the power is larger at the moment of operating.6. 250Vdc Voltage withstand for normally open 1200Vac. so each relay should avoid subjecting to DC voltage for a long time under non-operating state (not longer than 20s). typical value: 6ms Reset time <15ms Output contacts Ten groups of output contacts. 250Vdc Pickup power >9W: 110Vdc.6 Main Technical Data of Type MD1501-572 High burden self reset auxiliary relay: 110Vdc: MD1501-572B 125Vdc: MD1501-572N Rated voltage 220Vdc: MD1501-572A 250Vdc: MD1501-572M <2W: normally operating condition.2A@48Vdc. the power of the relay is larger under that situation. 2-6 MD1501 Series Auxiliary Relay Date: 2013-01-16 . 2. one group of signal contact Maximum voltage for contact 380Vac. 125Vdc Current of supervision relay coil 1. 10A@3s Breaking capacity for contact 1. users maybe gradually increase the DC voltage subject to the relay under non-operating state. 2 Technical Data NOTE! For the relay. 0.5A@110Vdc. 0. the relay does not operate Rated power consumption <120W: the moment that the relay operates <6W: the relay operates but the initiation contact is still closed Pickup voltage 55%Un~70%Un >25W: 220Vdc. When testing the relay. so each relay should avoid subjecting to DC voltage for a long time under non-operating state (not longer than 20s). the power of the relay is larger under that situation. 1min contact Current carrying capacity for contact 8A Overcurrent capacity for contact 50A@200ms. and the power is less after the operating. ..........2 Type MD1501-552 (Phase segregated trip circuit supervision relay) .........5 Type MD1501-571 (Electrical reset auxiliary relay................. 3 Operation Theory 3 Operation Theory Table of Contents 3 Operation Theory .............. 3-8 3...... 3-7 3.................... 3-1 3........................... high burden) .. 3-a 3.........................4 Type MD1501-561 (Bi-stable switching relay) .. 3-3 3....6 Type MD1501-572 (Self reset relay with electrical reset LED flag) ..................................... 3-5 3...1 Type MD1501-551 (Trip circuit supervision relay) ......................... 3-11 MD1501 Series Auxiliary Relay 3-a Date: 2013-01-21 ......................................3 Type MD1501-556 (Current operated auxiliary relay) ..... 3 Operation Theory 3-b MD1501 Series Auxiliary Relay Date: 2013-01-21 . 3 Operation Theory 3. n22 K2 n20 V 52b n19 K1 n17 n18 Supervised V circuit 52a Trip circuit supervision CB tripping circuitry Tripping contact K3 K1 V K2 Supervised circuit K4 K5 L1 status K3 V V indication K6-1 n01 K3 L2 K6-1 n02 K6-2 n03 n05 K6-2 n04 D9 D10 + K6+ n05 K6. n22 Figure 3.1-1 Trip circuit supervision relay type MD1501-551 Trip circuit supervision relay Application Trip circuit supervision function is accomplished by relay K1~K5. the typical connection is shown as dotted line part in Figure 3.1-1. (Example of latched connection) K4-1 n09 S1 S2 K4-1 n10 S3 K4-2 n11 S4 K4-2 n12 K5-1 n13 K5-1 n14 K5-2 n15 n01 K6-1 n02 n09 K4-1 n10 K5-2 n16 Contact of current n03 K6-2 n04 operated relay n11 K4-2 n12 K1+ n17 K1.1 Type MD1501-551 (Trip circuit supervision relay) Schematic diagram of type MD1501-551 is shown in Figure 3. n06 D8 Current operated Reserved n07 K6 n06 element and output I contact Reserved n08 . An alarm will be given by relays K4 and K5 if any of following conditions happens. n20 n15 K5-2 n16 DC+ n21 DC.1-1. 1) DC power supply is lost 2) A fault occurs within the tripping circuit Principle MD1501 Series Auxiliary Relay 3-1 Date: 2013-01-21 . n18 Contacts of supervision relay K2+ n19 n13 K5-1 n14 K2. n21 DC+ DC. relay K1 is energized and its normally open contact will make to energize relay K3. K6 will be energized via the protection tripping contact and its normally open contact connected in parallel with tripping contact will close to latch relay K6 until the current path is opened by the circuit breaker auxiliary contact. it is off if type MD1501-551 is operating normally. when the circuit breaker is closed. Operating device Figure 3. For example of a tripping circuit. Current operated auxiliary relay Application Current operated relay can be used as a repeat relay to provide auxiliary contacts. When the circuit breaker is open. alarm outputs are provided by relays K4 and K5. it will turn on due to trip circuit fault. Relay K3 is connected in parallel with a RC circuit providing 300ms delay drop off to prevent mal-operation during transition period of tripping. For the application as a latched element mentioned above. relays K1 and K2 are energized and their normally open contacts connected in parallel will make to energize relay K3. Principle Current operated relay K6 is connected in series between an initiation contact and operating device and energized by the through current. its normally open contact is connected in parallel with the initiation contact (between positive terminal of DC power supply and positive terminal of K6 (i. n21 DC+ n22 DC- Tripping contact K6 n05 n06 Current I operated relay n01 K6-1 n02 + . normally green if type MD1501-551 is operating normally. n05)). LED indicator LED indicator L1 (TCCS OK): operating indicator. relays K1 and K2 will drop off.e.1 about main technical data of type MD1501-551. protection device operates for an internal fault. it will go out due to power source loss or trip circuit fault. 3 Operation Theory Relays K1 and K2 can accomplish trip circuit supervision. 3-2 MD1501 Series Auxiliary Relay Date: 2013-01-21 . yellow. LED indicator L2 (ALARM): alarming indicator. This can prevent tripping or closing contact of protection or control device from arc breaking.6. consequently relay K3 drops off to initiate LED indicator L2 and reset relays K4 and K5 as well.1-2 Type MD1501-551 is connected with tripping contact as a current latched element Main technical data of type MD1501-551 Please refer to Section 2. If any of above mentioned abnormal conditions happens. One of the main application is to connect with tripping or closing contact of protection or control device as a current latched element. 50A short-circuit disconnect disconnect disconnect 0.80~2.00 2. MD1501 Series Auxiliary Relay 3-3 Date: 2013-01-21 .30~0.20~0.05~0.2 Type MD1501-552 (Phase segregated trip circuit supervision relay) Schematic diagram of type MD1501-552 is shown in Figure 3.50 1.2-1.00A short-circuit short-circuit disconnect disconnect 0.70~1. 3 Operation Theory Operating current of current operated relay: Table 3.00A short-circuit short-circuit short-circuit disconnect 0.75 2.50 3.25A disconnect disconnect disconnect disconnect 0.75 4.50~1.00A short-circuit short-circuit disconnect short-circuit 0.00 3.50A short-circuit disconnect short-circuit disconnect 0.40~1.50A short-circuit disconnect short-circuit short-circuit 0.60~1.25 1.50A short-circuit disconnect disconnect short-circuit 0.25 3.10~0.00A and above short-circuit short-circuit short-circuit short-circuit 0.125 0.1-1 Operating current change method of current operated relay of type MD1501-551 Setting method Operating current (A) Pickup current (A) S1 S2 S3 S4 0. relays K1 and K2 are energized and their normally open contacts connected in parallel will make to energize relay K7. relays K1 and K2 for A phase.2-1 Phase segregated trip circuit supervision relay type MD1501-552 Application Trip circuit supervision function is accomplished by relay K1~K9 (phase segregated trip circuits can be supervised simultaneously). When phase-A of the circuit breaker is open. 1) DC power supply is lost 2) A fault occurs within the trip circuit of any phase Principle Relays K1~K6 can accomplish phase segregated trip circuit supervision (2 relays for each phase.2-1. When phase-A of the circuit breaker is closed. n12 K3+ n13 K8 K9 L1 K3. i. the typical connection is shown as dotted line part in Figure 3. if any of above conditions happens on 3-4 MD1501 Series Auxiliary Relay Date: 2013-01-21 . n16 K5+ n17 K5. n18 K6+ n19 n01 K8-1 n02 n05 K9-1 n06 K6. n22 Figure 3. n20 Contacts of Contacts of n03 K8-2 n04 supervision n07 K9-2 n08 supervision DC+ n21 relay relay DC. An alarm will be given by relays K8 and K9 if any of following conditions happens. relay K1 is energized and its normally open contact will make to energize relay K7. Takes trip circuit supervision of phase-A as an example. 3 Operation Theory n21 n22 DC+ DC- K1 K2 n09 n10 n11 n12 V V 52b 52a Phase-A Tripping contact Phase-A K3 K4 Trip circuit supervision n13 n14 n15 n16 V V 52b 52a Phase-B Tripping contact K8-1 n01 Phase-B K8-1 n02 K5 K6 K8-2 n03 n17 n18 n19 n20 V V K8-2 n04 52b K9-1 n05 52a K9-1 n06 Phase-C K9-2 n07 Tripping contact Phase-C K9-2 n08 CB tripping K1+ n09 circuitry K7 K1.e. n14 K7 Supervised V V K4+ n15 circuit status K7 L2 indication K4. relays K3 and K4 for B phase and relays K5 and K6 for C phase). n10 K1 K3 K5 V K2+ n11 K2 K4 K6 K2. it is off if type MD1501-552 is operating normally. it will turn on due to trip circuit fault.3-1. n05 D4 D5 n01 K1-1 n02 D1 K1 n06 n03 K1-2 n04 I Current operated S11 relay 1 S12 S13 K1-1 n01 S14 K1-1 n02 K1-2 n03 n12 K1-2 n04 D6 D7 K1+ n05 n08 K2-1 n09 D2 K1. LED indicator LED indicator L1 (TCCS OK): operating indicator. yellow.3-1 Current operated auxiliary relay type MD1501-556 Application Current operated relay can be used as a repeat relay to provide auxiliary contacts. similar operation for other phases. n06 n07 K2 n13 n10 K2-2 n11 I Current operated K2-1 n08 relay 2 K2-1 n09 S21 S22 K2-2 n10 S23 K2-2 n11 S24 K2+ n12 K2. 3.2 about main technical data of type MD1501-552. 3 Operation Theory phase-A circuitry. Relay K7 is connected in parallel with a RC circuit providing 300ms delay drop off to prevent mal-operation during transition period of tripping. it will go out due to power source loss or trip circuit fault. normally green if type MD1501-552 is operating normally.3 Type MD1501-556 (Current operated auxiliary relay) Schematic diagram of type MD1501-556 is shown in Figure 3. n13 n19 n14 D8 D9 K3-1 n15 n15 K3-1 n16 D3 K3-1 n16 n17 K3-2 n18 K3-2 n17 K3 n20 Current operated I relay 3 K3-2 n18 K3+ n19 S31 S32 K3. n20 S33 n21 S34 n22 Figure 3. Main technical data of type MD1501-552 Please refer to Section 2. relays K1 and K2 will drop off. One of the MD1501 Series Auxiliary Relay 3-5 Date: 2013-01-21 .6. LED indicator L2 (ALARM): alarming indicator. Alarm contacts are provided by relays K8 and K9. consequently relay K7 drops off to initiate LED indicator L2 and reset relays K8 and K9 as well. 25 3.50A short-circuit disconnect disconnect disconnect 0. Principle Current operated relay is connected in series between an initiation contact and operating device and energized by the through current.00 2. DC+ DC- Tripping contact K1 n05 n06 Current I operated relay n01 K1-1 n02 + .125 0.70~1. current operated relay will be energized via the protection trip contact and its normally open contact connected in parallel with trip contact will close to latch current operated relay K1 until the current path is opened by the circuit breaker auxiliary contact. n05.75 4.00A short-circuit short-circuit disconnect short-circuit 0.50~1.00A short-circuit short-circuit disconnect disconnect 0.50A short-circuit disconnect short-circuit short-circuit 0. This can prevent tripping or closing contact of protection or control device from arc breaking. n12 or n19)).50 1. The typical application is shown as following diagram.05~0. For the application as a latched element mentioned above.00A and above short-circuit short-circuit short-circuit short-circuit 0. Operating current of current operated relay: Operating current of current operated auxiliary relay Table 3.30~0.50A short-circuit disconnect disconnect short-circuit 0.3-1 Operating current change method of type MD1501-556 Setting method K1: S11 K1: S12 K1: S13 K1: S14 Operating current (A) Pickup current (A) K2: S21 K2: S22 K2: S23 K2: S24 K3: S31 K3: S32 K3: S33 K3: S34 0.3 about main technical data of type MD1501-556.50A short-circuit disconnect short-circuit disconnect 0. Operating device Figure 3.25 1.6.60~1.25A disconnect disconnect disconnect disconnect 0.40~1.50 3.3-2 Type MD1501-556 is connected with tripping contact as a current latched element Main technical data of type MD1501-556 Please refer to Section 2.e.75 2.00 3-6 MD1501 Series Auxiliary Relay Date: 2013-01-21 . 3 Operation Theory main applications is to connect with tripping or closing contact of protection or control device as a current latched element.00A short-circuit short-circuit short-circuit disconnect 0.80~2. takes relay K1 as an example. its normally open contact is connected in parallel with the initiation contact (between positive terminal of DC power supply and positive terminal of current operated relay (i.10~0. if protection device operates for an internal fault.20~0. It can also be used for various applications as a bi-stable relay or electrical reset relay for signal selection or switching control etc.1 (BB1) and busbar No. the common point of output contacts is connected to a voltage detection element. other relays are magnetic latched relays.4 Type MD1501-561 (Bi-stable switching relay) Schematic diagram of type MD1501-561 is shown in Figure 3. the relay state will not change even the dc supply is lost. n18.4-1 Bi-stable switching relay type MD1501-561 Application The relay is dedicated designed for voltage switching automatically according to the state of busbar disconnector. MD1501 Series Auxiliary Relay 3-7 Date: 2013-01-21 . the output status will not be interrupted. Alarm signal output by n13 and n16 indicates the lost of switch-in signals for both bi-stable relays. Voltage switching of a double-busbar arrangement is taken as an example. subject to the requirement of applications. both normally open and normally closed auxiliary contacts of both busbar 1 and busbar 2 disconnectors are connected to the inputs of the two relay groups (n17. Principle Two relay groups are controlled by double-state auxiliary contacts of two devices respectively. n19 and n20). 3 Operation Theory 3. Except relay K11 and K12. n21 n22 DC+ DC- The first group of K11 normally open contact n17 K12 K13 K14 Busbar I The first group of n18 normally closed contact K14-1 n01 The second group of K21 normally open contact n19 K22 K23 K24 K24-1 n02 Busbar II K14-1/K24-1 n03 n20 The second group of K14-2 n04 normally closed contact K24-2 n05 K14/K24-2 n06 L1 K12-1 LED K13-1 n07 L2 Indication K23-1 n08 K22-1 K13-1/K23-1 n09 K13-2 n10 n03 n01 n16 K21-2 K11-2 n13 K23-2 n11 K14-1 K13-2/K23-2 n12 n02 n14 Signal contact K24-1 K22-2 K12-2 Both In input lost n13 n06 n04 Both state In n14 K14-2 n15 n05 K24-2 Signal common n16 n09 n07 Output contact Device 1 NO n17 K13-1 Device 1 NC n18 n08 K23-1 Device 2 NO n19 n12 n10 Device 2 NC n20 K13-2 n11 DC+ n21 K23-2 DC.4-1. n22 Figure 3.2 (BB2) are connected to the relay output contacts respectively as the sources of voltage signal. Alarm signal output by n14 and n16 indicates both bi-stable relays in ‘operated state’ that source signals are coupled. LED indicator L1 on (Green) indicates the first group bi-stable relays (K12. voltage of busbar No. 5-2. LED indicator L2 on (Green) indicates the second group bi-stable relays (K22.4 about main technical data of type MD1501-561. K23 and K24) in ‘operated state’. NO contact: normally open contact.5 Type MD1501-571 (Electrical reset auxiliary relay.5-1 and Figure 3. it will turn on if the second groups of switching relay operates Main technical data of type MD1501-561 Please refer to Section 2. 3. LED indicator LED indicator L1 (ON BB1): green. it will turn on if the first groups of switching relay operates LED indicator L2 (ON BB2): green.6. 3-8 MD1501 Series Auxiliary Relay Date: 2013-01-21 . high burden) Schematic diagram of type MD1501-571 is shown in Figure 3. 3 Operation Theory K13 and K14) in ‘operated state’. NC contact: normally closed contact. 3 Operation Theory n21 n22 DC+ DC- L1 Coil healthy OP1 LED V K7 indicator L2 Operating K2-2 LED indicator K2-1 K6-1/K6-2/K5-1 n01 Operate Initiation contact K6-1 n02 n19 K1 K2 K3 K4 K5 K6 K6-2 n03 K5-1 n04 Reset Reset K5-2/K4-1/K4-2 n05 n20 K5-2 n06 K4-1 n07 n01 n02 n17 K7-1 n18 K4-2 n08 K6-1 Supervision signal contact K3-1 n09 n03 K6-2 K3-1 n10 n04 K3-2 n11 K5-1 K3-2 n12 n05 n06 K4-1 K2-1 n13 K4-2 n07 K2-1 n14 Output contacts K2-2 n15 n08 K5-2 K2-2 n16 n09 n10 K7-1 n17 K3-1 K7-1 n18 n11 n12 K3-2 Operate n19 n13 K1-1 n14 Reset n20 DC+ n21 n15 n16 K1-2 DC. n22 Figure 3.5-2 Electrical reset relay type MD1501-571 (Output 6 NO contacts and 2 NC contacts) MD1501 Series Auxiliary Relay 3-9 Date: 2013-01-21 .5-1 Electrical reset relay type MD1501-571 (Output 9 NO contacts and 1 NC contact) n21 n22 DC+ DC- L1 Coil healthy OP1 V LED indicator K7 K6-1 n01 L2 Operating LED K2-2 indicator K6-1 n02 K2-1 K5-1 n03 K5-1 n04 Operate K4-1 n05 Initiation contact n19 K1 K2 K3 K4 K5 K6 K4-1 n06 K4-2 n07 Reset Reset K4-2 n08 n20 K3-1 n09 K3-1 n10 n01 n02 n17 K7-1 n18 K3-2 n11 K6-1 Supervision signal contact K3-2 n12 n03 n04 K5-1 K1-1 n13 n05 n06 K1-1 n14 K4-1 K1-2 n15 n07 n08 K4-2 K1-2 n16 n09 K3-1 n10 Output contacts K7-1 n17 K7-1 n18 n11 n12 K3-2 Operate n19 n13 K1-1 n14 Reset n20 n15 n16 DC+ n21 K1-2 DC. n22 Figure 3. it is off if type MD1501-571 is operating normally. It may be used for various applications as repeat relay. the power is larger at the moment of operating. LED indicator L2 (LOCKOUT): red.5 about main technical data of type MD1501-571. Principle Relay K1~K6 are latched relays. 3 Operation Theory Application Electrical reset relay requires a voltage to be applied to the element to reset the contacts. the indicator L2 is kept via contact K2-2. please refer to Figure 3. the LED indicator L2 (Red) will be lit until the relay is reset. such as coil open-circuited. Output contact mode Two kinds of output contact mode are provided. relay status supervision indicator. users maybe gradually increase the DC voltage subject to the relay under non-operating state.5-2 for details. control relay or signal selection etc. NOTE! For the relay. loss of DC power supply etc. The output contacts of K1~K6 can be used for tripping circuit breaker. If the relay coil circuitry is healthy. the LED indicator L1 is lit (Green). in fact. This makes the relay suitable for use in distributed tripping or control circuitry where the initiating contact may be remote from the relay. When testing the relay. operating status indicator. Relay operating coil supervision circuit is composed of opto-coupler (OP1) and relay K7. the power of the relay is larger under that situation. operating secondary equipments and applied in other secondary circuits. so each relay should avoid subjecting to DC voltage for a long time under non-operating state (not longer than 20s). subject to the requirement of applications. After the relay is operated. The high burden provides greater immunity to capacitance discharge currents resulted at the inception of an earth fault on DC circuitry. and the power is less after the operating. Main technical data of type MD1501-571 Please refer to Section 2. LED indicator LED indicator L1 (RLY COIL): green. they will maintain the position after triggered by initiation contact at terminal n19 even the initiation contact is released. it will go out due to relay coil fault. If the relay is in operated condition. normally green if type MD1501-571 is operating normally. it continuously monitors relay coils and releases alarm via signal contact n17 and n18 under abnormal situations. 3-10 MD1501 Series Auxiliary Relay Date: 2013-01-21 . it will turn on if the relay operates.5-1 and Figure 3.6. After relay operation.6-1. operating secondary equipments and applied in other secondary circuits. The output contacts of K2~K6 can be used for tripping circuit breaker. they will be energized and reset if initiation contact at terminal n19 is closed and released respectively. Another K1 contact. making them suitable for use as trip repeat relay and general flagging purpose. n22 Figure 3. This makes the relay suitable for use in distributed tripping or control circuitry where the initiating contact may be remote from the relay. Principle Relay K2~K6 are follower relays. n21 n22 L1 Relay coil OP1 V K7 Supervision L2 Operating K1-2 LED Operating relay indicator K1-1 K6-1/K6-2/K5-1 n01 Operating K6-1 n02 circuitry K6-2 n03 Initiation K2 K3 K4 K5 K6 n19 K1 contact V V V V V K5-1 n04 Reset K5-2/K4-1/K4-2 n05 Reset n20 K5-2 n06 K4-1 n07 K4-2 n08 n01 n02 n17 K7-1 n18 Relay K6-1 supervision K3-1 n09 signal contact n03 K3-1 n10 K6-2 n04 K3-2 n11 K5-1 K3-2 n12 n05 n06 K5-2 K2-1 n13 n07 K2-1 n14 K4-1 K2-2 n15 n08 output contacts K4-2 K2-2 n16 n09 n10 K7-1 n17 K3-1 K7-1 n18 n11 n12 K3-2 Initiation n19 n13 n14 Reset n20 K2-1 n15 n16 DC+ n21 K2-2 DC. the LED indicator L2 (Red) will be lit by K1 normally open contact until the relay is reset. The high burden provides greater immunity to capacitance discharge currents resulted at the inception of an earth fault on DC circuitry. normally closed. MD1501 Series Auxiliary Relay 3-11 Date: 2013-01-21 . If the relay is in operated condition.6-1 Self reset auxiliary relay type MD1501-572 Application Self reset relays reset when initiating signal is removed.6 Type MD1501-572 (Self reset relay with electrical reset LED flag) Schematic diagram of type MD1501-572 is shown in Figure 3. K1 is a magnetic latched relay operated together with K2~K6 relays. 3 Operation Theory 3. is internally wired as cut-off contact for economizing element. this reduces the burden by switching out shunt resistance. such as coil open-circuited. LED indicator LED indicator L1 (RLY COIL): green.6. LED indicator L2 (PICK UP): red. If the relay coil circuitry is healthy. 3-12 MD1501 Series Auxiliary Relay Date: 2013-01-21 . When testing the relay. relay status supervision indicator. After the relay is operated. 3 Operation Theory Relay operating coil supervision circuit is composed of opto-coupler (OP1) and relay K7. it is off if type MD1501-572 is operating normally. Main technical data of type MD1501-572 Please refer to Section 2. the power is larger at the moment of operating. the indicator L1 is kept via contact K1-2. NOTE! For the relay. the LED indicator L1 is lit (Green). so each relay should avoid subjecting to DC voltage for a long time under non-operating state (not longer than 20s).6 about main technical data of type MD1501-572. in fact. users maybe gradually increase the DC voltage subject to the relay under non-operating state. loss of DC power supply etc. the power of the relay is larger under that situation. operating status indicator. normally green if type MD1501-572 is operating normally. it continuously monitors relay coils and releases alarm via signal contact n17 and n18 under abnormal situations. it will turn on if the relay operates. it will go out due to relay coil fault. and the power is less after the operating. .........................................6 Mechanical Installation ...7 Electrical Installation and Wiring .......................................................... 4 Installation 4 Installation Table of Contents 4 Installation........... 4-2 4.2 Safety Information.. 4-5 MD1501 Series Auxiliary Relay 4-a Date: 2013-01-20 ................................... 4-2 4.......................................................................................................................................................................................................................1 General..............5 Device Location and Ambient Conditions .......................................... 4-1 4.................3 Checking the Shipment .......................................... 4-2 4........................................... 4-3 4...................................................4 Material and Tools Required .... 4-a 4................ 4-1 4.......................................................... 4 Installation 4-b MD1501 Series Auxiliary Relay Date: 2013-01-20 . Working in a high voltage environment requires serious approach to avoid human injuries and damage to equipment. Air must circulate freely around the equipment. The product contains electronic circuit which can be damaged if exposed to static electricity (ESD). 4. Operating the protection equipment without proper grounding may damage both terminal and measuring circuitry. regardless of the operating conditions. Warning signs WARNING! Strictly follow the company and country safety regulations. The electronic circuitries also contain high voltage which is lethal to humans. Warning signs are presented which attend the user to be careful during certain operations in order to avoid human injuries or damage to equipment. Never unmount the front or back cover from a powered equipment or from a protection equipment connected to powered circuitry. Observe all the requirements regarding place of installation and ambient conditions given in this instruction manual. Do not touch circuitry during operation. Potentially lethal voltages and currents are present. Strictly observe the corresponding guidelines contained in this section. Choose the place of installation that is facilitate for connection. Potentially lethal voltages and currents are present. 4 Installation 4. stored and installed with the greatest care.2 Safety Instructions This section contains safety information. Always use suitable isolated test pins when measuring signals in open circuitry. Take care that the external wiring is properly brought into the equipment and terminated correctly and pay special attention to grounding. Caution signs MD1501 Series Auxiliary Relay 4-1 Date: 2013-01-20 . demonstrations and off-site configuration.1 General The equipment must be shipped. Always connect the protection equipment to protective ground. and may cause injuries in case of an accident. Potentially lethal voltages and currents are present. Always avoid touching the circuitry when the cover is removed. This also applies to special occasions such as bench testing. Operation may be disrupted and equipment and measuring circuitry may be damaged. Never connect or disconnect a wire and/or a connector to or from a equipment during normal operation. Hazardous voltages and currents are present that may be lethal. high levels of humidity. Always handle modules using a conductive wrist strap connected to protective ground and on a suitable antistatic surface. 4. including screws. lodge a claim immediately in writing with the last carrier and notify the nearest NR Company or agent. Internal circuitry may be damaged. store all the parts in their original packing in a clean dry place at a moderate temperature. to the human machine interface of the equipment.e.5 Device Location and Ambient Conditions The place of installation should permit easy access especially to front of the device. If the equipment is not going to be installed immediately. i. 2.3 Checking the Shipment Check that the consignment is complete immediately upon receipt. pincers and assembly instructions. such as: 1. Electrostatic discharge (ESD) may cause damage to the module. Take care to avoid electrical shock if accessing wiring and connection equipment when installing and commissioning. There should also be free access at the rear of the equipment for additions and replacement of electronic boards. extreme changes of temperature.4 Material and Tools Required The necessary mounting kits will be provided. The humidity at a maximum temperature and the permissible storage temperature range in dry air are listed in Chapter 2. Notify the nearest NR Company or agent. 4. 4 Installation CAUTION! Always transport modules using certified conductive bags. the shipping papers or the order be found. 4. aggressive substances). should departures from the delivery note. A suitable drill and spanners are required to secure the cubicles to the floor using the plugs provided (if this relay is mounted in cubicles). The location should not be exposed to excessive air pollution (dust. Do not connect live wires to the protection equipment. surge voltages of 4-2 MD1501 Series Auxiliary Relay Date: 2013-01-20 . When there is evidence of transport damage. Since every piece of technical equipment can be damaged or destroyed by inadmissible ambient conditions. Visually inspect all the material when unpacking it. Severe vibration. type MD1501-552. Type MD1501-551.6 Mechanical Installation Following six figures show the front view of the six types auxiliary relay. 4 Installation high amplitude and short rise time and strong induced magnetic fields should be avoided as far as possible. but it is normally mounted vertically (visibility of markings). WARNING! Excessively high temperature can appreciably reduce the operating life of this relay. A “RESET” push button is equipped for type MD1501-571 and type MD1501-572. type MD1501-556 and type MD1501-561 do not have “RESET” push button. 4. MD1501 Series Auxiliary Relay 4-3 Date: 2013-01-20 . 3. Air must not be allowed to circulate freely around the equipment. The equipment can in principle be mounted in any attitude. Figure 4.6-2 Dimensions of equipment 4-4 MD1501 Series Auxiliary Relay Date: 2013-01-20 . 4 Installation Figure 4.6-1 Front view of each auxiliary relay Following two figures show the dimensions of relay for reference in mounting. 7.7 Electrical Installation and Wiring 4. There is also a background of electromagnetic RF fields in electrical installations that can induce spurious currents in the devices themselves or the leads connected to them.1 Grounding Guidelines Switching operations in HV installations generate transient over voltages on control signal cables.6-3 Trepanning dimensions of equipment NOTE! It is necessary to leave enough space top and bottom of the cut-out in the cubicle for heat emission of this relay. wiring and screening. On the other hand. MD1501 Series Auxiliary Relay 4-5 Date: 2013-01-20 . 4 Installation Figure 4. In order to minimize these influences as far as possible. certain standards have to be observed with respect to grounding. electronic apparatus can transmit interference that can disrupt the operation of other apparatus. 4. All these influences can influence the operation of electronic apparatus. 4 Installation NOTE! All these precautions can only be effective if the station ground is of good quality.2 Cubicle Grounding The cubicle must be designed and fitted out such that the impedance for RF interference of the ground path from the electronic device to the cubicle ground terminal is as low as possible. they must also be non-corroding. 4-6 MD1501 Series Auxiliary Relay Date: 2013-01-20 . 4. The contact surfaces must not only conduct well. Movable parts of the cubicle such as doors (front and back) or hinged equipment frames must be effectively grounded to the frame by three braided copper strips (see Figure 4. NOTE! If the above conditions are not fulfilled. The metal parts of the cubicle housing and the ground rail are interconnected electrically conducting and corrosion proof. NOTE! For metallic connections please observe the voltage difference of both materials according to the electrochemical code. blanking plates etc. there is a possibility of the cubicle or parts of it forming a resonant circuit at certain frequencies that would amplify the transmission of interference by the devices installed and also reduce their immunity to induced interference..7. Metal accessories such as side plates. must be effectively connected surface-to-surface to the grounded frame to ensure a low-impedance path to ground for RF interference. The contact surfaces shall be as large as possible. The cubicle ground rail must be effectively connected to the station ground rail by a grounding strip (braided copper).7-1). . The DC power supply will be injected to the input terminals of various modules after connecting to an air switch with a certain capacity. 1.7. external circuit will connect the relevant terminal board through dedicated cable. Connecting the auxiliary power: All modules of the device demand to introduce DC operation power supply. 2. Input/output signal connectors: The input and output circuits will be connected with the terminal board generally.3 Ground Connection on the Device Always make sure established guidelines for this type of terminal is followed during installation.7-1 Cubicle grounding system 4. MD1501 Series Auxiliary Relay 4-7 Date: 2013-01-20 . 4 Installation Door or hinged equipment frame Cubicle ground rail close to floor Braided copper strip Station ground Conducting connection Figure 4. 4 Installation 4-8 MD1501 Series Auxiliary Relay Date: 2013-01-20 . ....... 5-4 MD1501 Series Auxiliary Relay 5-a Date: 2012-06-04 .................1 General..........................................2 Safety Instructions ..................3 Commission Tools .........................................................................1 With the Relay De-energized ............................................................................................................................................ 5-1 5..................................................2 With the Relay Energized ...........4 Product Checks .......................................................3 Final Checks ................................................... 5-2 5.. 5-a 5...................4..........................................4..................................................... 5-4 5.................................................. 5-1 5.................................4............................................................... 5 Commissioning 5 Commissioning Table of Contents 5 Commissioning ................ 5-2 5................................... 5-1 5........... 5 Commissioning 5-b MD1501 Series Auxiliary Relay Date: 2012-06-04 . make sure that no other measurement quantities are connected. etc.1 General Before carrying out any work on the equipment. When testing the device with secondary test equipment. 5. who are familiar with the commissioning of protection system.).3 Commission Tools Minimum equipment required: Multifunctional protection tester (for example: CMC356 multifunctional protection tester of Omicron). Non-observance of the safety rules can result in severe personal injury or property damage. Multimeter with suitable AC voltage range of 0~500V and DC voltage range of 0~250V MD1501 Series Auxiliary Relay 5-1 Date: 2012-06-04 . not even during testing and commissioning. the user should be familiar with the contents of the safety and technical data sections and the ratings on the equipment’s rating label. WARNING! Only the qualified personnel shall work on and around this equipment after becoming thoroughly familiar with all warnings and safety notices of this manual as well as with the applicable safety regulations. Particular attention must be drawn to the following: Hazardous voltages can be present on all circuits and components connected to the supply voltage or to the measuring and test quantities. 5. 5 Commissioning 5. WARNING! Primary test may only be carried out by qualified personnel. The limit values stated in the Chapter “Technical Data” must not be exceeded at all. Take also into consideration that the trip circuits and maybe also close commands to the circuit breakers and other primary switches are disconnected from the device unless expressly stated. the operation of the plant and safety rules and regulations (switching.2 Safety Instructions WARNING! Hazardous voltages are present in this electrical equipment during operation. earthing. 5. equipment inside and other parts inside to see that no physical damage has occurred since installation. The function tests are carried out according to user’s correlative regulations. Earthing cable Check whether the earthing cable from the panel terminal block is safely screwed to the panel 5-2 MD1501 Series Auxiliary Relay Date: 2012-06-04 . internal module might also have been affected.1 Visual Inspection After unpacking the product.1 With the Relay De-energized This relay is fully numerical and the hardware is continuously monitored. The following items listed is necessary. 5. indicators. Protection panel Carefully examine the protection panel. 5 Commissioning respectively. Carefully examine the wiring to see that they are no connection failure exists. Optional equipment: An electronic or brushless insulation tester with a DC output not exceeding 500V (for insulation resistance test when required). 5. contact the vendor. is functioning correctly and all input quantity measurements are within the stated tolerances.4 Product Checks These product checks cover all aspects of the relay which should be checked to ensure that it has not been physically damaged prior to commissioning. NOTE! Modern test set may contain many of the above features in one unit. The rated information of other auxiliary protections should be checked to ensure it is correct for the particular installation.4. terminal blocks.4. switches and push buttons to make sure that their labels meet the requirements of this project. Panel wiring Check the conducting wire which is used in the panel to assure that their cross section meeting the requirement.1. If there is any damage. check for any damage to the relay case. Label Check all the isolator binary inputs. Commissioning tests can be kept to a minimum and need only include hardware tests and conjunctive tests. 5. WARNING! Energize this relay only if the power supply is within the specified operating ranges in Chapter 2. Switch.3 External Wiring Check that the external wiring is correct to the relevant relay diagram and scheme diagram. 5 Commissioning steel sheet. Ensure as far as practical that phasing/phase rotation appears to be as expected. and do the insulation resistance test for each circuit above with an electronic or brushless insulation tester. MD1501 Series Auxiliary Relay 5-3 Date: 2012-06-04 . Isolate all wiring from the earth and test the isolation with an electronic or brushless insulation tester at a DC voltage not exceeding 500V.4 Auxiliary Power Supply The relay only can be operated under the auxiliary power supply depending on the relay’s nominal power supply rating. measure the auxiliary supply to ensure it within the operating range. isolator binary inputs and push buttons work normally and smoothly. The incoming voltage must be within the operating range specified in Chapter 2. 5. On completion of the insulation resistance tests. equipment keypad. See this section for further details about the parameters of the power supply. 5. The circuits need to be tested should include: Optic-isolated control inputs Output contacts Grounding terminal The insulation resistance should be greater than 100MΩ at 500V.4. Other requirements to the auxiliary power supply are specified in Chapter 2. keypad. Check the wiring against the schematic diagram for the installation to ensure compliance with the customer’s normal practice. before energizing the relay. ensure all external wiring is correctly reconnected to the equipment.1. Test method: To unplug all the terminals sockets of this relay.1.4.1. isolator binary inputs and push button Check whether all the switches.4.2 Insulation Test (if required) Insulation resistance tests are only necessary during commissioning if it is required for them to be done and they have not been performed during installation. 4. 5-4 MD1501 Series Auxiliary Relay Date: 2012-06-04 . The trip circuit should also remain isolated to prevent accidental operation of the associated circuit breaker for these checks. Ensure the equipment is put into service. it means the binary input is valid. If it has been necessary to disconnect any of the external wiring from the protection in order to perform the wiring verification tests.4. remove all test or temporary shorting leads. The binary inputs should be energized one at a time. 5. Testing the Binary Inputs and Binary Outputs This test checks that all the binary inputs and binary outputs on the equipment are functioning correctly. If the relay circuit is operating normally and corresponding binary output is energized. see external connection diagrams for terminal numbers. it should be ensured that all connections are replaced in accordance with the relevant external connection or scheme diagram. Ensure that the voltage applied on the binary input must be within the operating range. etc. 5 Commissioning 5.3 Final Checks After the above tests are completed.2 With the Relay Energized The following check verify that the relay hardware is functioning correctly and should be carried out with the auxiliary supply applied to the relay. and make sure that all abnormality that may effect the device have been cleared and signal indicators have been reset. ...............................................................................1 Failure Tracing and Repair ...................................................2 Replace Failed Relay ............................................... 6-1 6........................................................... 6-1 6.4 Storage .................... 6-2 MD1501 Series Auxiliary Relay 6-a Date: 2012-06-04 .. 6-2 6.... 6-a 6.......................................................................................................................................................................................... 6 Maintenance 6 Maintenance Table of Contents 6 Maintenance ...........3 Cleaning ........ 6 Maintenance 6-b MD1501 Series Auxiliary Relay Date: 2012-06-04 . MD1501 Series Auxiliary Relay 6-1 Date: 2012-06-04 . The relay type is indicated on the relay. Repair at the site should be limited to relay replacement. WARNING! Units and modules may only be replaced while the supply is switched off and only by appropriately trained and qualified personnel. 6 Maintenance After installation. It takes approximately 30 seconds for the voltage to discharge. CAUTION! When handling a relay. WARNING! Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. When a failure is detected during regular testing. the user can recover the relay by replacing the failed relay. confirm the following: Test circuit connections are correct Correct power supply voltage is applied Test procedures comply with those stated in the manual 6. Otherwise.1 Failure Tracing and Repair Failures will be detected by automatic supervision or regular testing. take anti-static measures such as wearing an earthed wrist band and placing modules on an earthed conductive mat. Maintenance at the component level is not recommended. If the equipment runs under harsh natural conditions and operates rarely. regular maintenance of the equipment is recommended. Furthermore. then regularly confirm whether the device is operating normally and the external wiring is good.2 Replace Failed Relay If the failure is identified in the relay and the user has spare relays. many of the electronic components could suffer from damages. Check that the replacement relay has an identical type and rated parameters to the removed relay. Strictly observe the basic precautions to guard against electrostatic discharge. 6. 6 Maintenance DANGER! After replacing relays. 6. Persons may also be put in danger. Do not use abrasive material or detergent chemicals. be sure to check that the external wiring is same as that before the replacement.3 Cleaning Before cleaning the relay. but the temperature of from -10°C to 40°C is recommended for long-term storage. 6.4 Storage The spare relay or module should be stored in a dry and clean room. Based on IEC standard 60255-1 the storage temperature should be from -40°C to 70°C. If this is not the case. Use a smooth cloth to clean the front panel. 6-2 MD1501 Series Auxiliary Relay Date: 2012-06-04 . ensure that DC supply is isolated to prevent any chance of an electric shock. there is a danger of the unintended operation of switchgear taking place or of relays not functioning correctly. ........2 Disposal .................................................. 7-1 7........................................................................................... 7-a 7............................................ 7 Decommissioning and Disposal 7 Decommissioning and Disposal Table of Contents 7 Decommissioning and Disposal ........... 7-1 MD1501 Series Auxiliary Relay 7-a Date: 2012-06-04 ........................1 Decommissioning ......................... 7 Decommissioning and Disposal 7-b MD1501 Series Auxiliary Relay Date: 2012-06-04 . 2 Disposal In every country there are companies specialized in the proper disposal of electronic waste. MD1501 Series Auxiliary Relay 7-1 Date: 2012-06-04 . Switching off To switch off the external miniature circuit breaker of the power supply. 3. make sure that there is an adequate safety distance to live parts. DANGER! When the station is in operation. Disconnecting Cables Disconnect the cables connected to the equipment. after which the cubicles may also be removed. 7. make sure that the external miniature circuit breaker of the power supply is switched off. 7 Decommissioning and Disposal 7. especially as dismantling is often performed by unskilled personnel.1 Decommissioning 1. 2. Dismantling The equipment may now be removed from the system cubicle. NOTE! Strictly observe all local and national regulations when disposing of the device. DANGER! Before disconnecting the power supply cables that connected with the equipment. 7 Decommissioning and Disposal 7-2 MD1501 Series Auxiliary Relay Date: 2012-06-04 . several descriptions on existing features have been modified. 8 Manual Version History 8 Manual Version History In the latest version of the instruction manual. R1.00 R1. Breaking capacity for contact is modified.00 2012-06-04 Form the original manual. MD1501 Series Auxiliary Relay 8-1 Date: 2013-01-21 . Main technical data of each type are removed to Chapter 2.01 2013-01-21 Add a kind of output contact mode for type MD1501-571. Manual version and modification history records Manual Version Date Description of change Source New R1. 8 Manual Version History 8-2 MD1501 Series Auxiliary Relay Date: 2013-01-21 .