bus differential relay 487B_PF00063

SEL-487BBus Differential and Breaker Failure Relay A Powerful Solution for Busbar Differential Protection Select the SEL-487B for the differential protection of busbar systems with up to 21 terminals. Features and Benefits Protection Protect bus systems with up to 21 terminals (21 CTs per relay, 63 CTs with a three-relay scheme), 6 protection zones, and 3 additional independent check zones. To optimize protection security, the check zones supervise up to 6 zones, and a patented open CT detection algorithm blocks potential misoperations during open or shorted CT conditions. Differential and directional current elements provide increased security and fast fault detection. Reduce protection costs with built-in breaker failure protection. Flexibility Implement different ratio CTs and nondedicated CTs with the SEL-487B Bus Differential and Breaker Failure Relay. Eliminate complex wiring by using CT ratios that differ by up to a factor of 10:1. Take advantage of the same CTs for differential protection, metering, backup relaying, and other functions. Automation and Control Reduce project costs and simplify interconnect wiring using multiple communications protocols and ports. Configurable operator controls and simplified variable naming provide added power to SELogic® control equations. Monitoring and Metering Provide accurate, timely monitoring and metering of busbar, feeder, and substation signals. Terminal currents, breaker and disconnect positions, station dc voltage levels, and three-phase voltage are continuously monitored and updated. Enhanced Security Indicate the relay configuration, who accesses it, and at what access level, with programmable alarm bits. Making Electric Power Safer, More Reliable, and More Economical ® 2 . View relay status. • Provide information to the right people for improved system performance. • Use popular Telnet applications for easy terminal communication with SEL relays and other devices. metering information. • Use DNP3 LAN/WAN or Modbus® TCP to quickly send information through your networks. • Transfer data with high-speed Ethernet for fast HMI updates and file uploads. and the SEL-487B for the fastest overall performance of IEC 61850 relays for substation automation and control.Functional Overview 52-6 HMI Operator Interface RTU Remote Terminal Unit S DFR Event Reports SBM Station Battery Monitor SER Sequential Events Recorder LGC Expanded SELOGIC® MET High-Accuracy Metering 85 RIO SEL MIRRORED BITS® 16E C Access Security *Optional Functions 4 EIA-232 2 Ethernet* (Copper or Fiber-Optic) 1 IRIG-B Integrate With Ethernet Networks Apply SEL-487B Relays with Ethernet directly to a local network or through an SEL communications processor. SEL-3351 Network SEL-2725 SEL-351 SEL-351 SEL-3530 SEL-487B SEL-351 Typical Ethernet network configuration. an Ethernet network. • Combine IEC 61850 technology. Web server access requires the relay password and is limited to readonly viewing of information. and settings. • Simplify wiring and installation by receiving a time signal over existing Ethernet networks. SNTP makes a good backup to more accurate IRIG-B time synchronization. • Access basic relay information on a standard Ethernet network with the built-in web server. Sequential Events Recorder (SER) reports. Three separate voltage elements consist of two levels of phase under.and overvoltage elements and two levels of negative. 3 –100 –150 0 Internal Fault Detection (No Differential Element Operation) Time Differential element remains secure for external faults with CT saturation. If the conditions persist for longer than a user-specified delay. wrong CT ratios). time-overcurrent element has two reset characteristics.Differential Protection The SEL-487B includes six independent current differential elements. including high-speed contact closure. and each one provides: • Fast operate times for all busbar faults • Security for external faults with heavy CT saturation • Security with subsidence current present • High sensitivity to busbar faults • Minimum delay for faults evolving from external to internal High-Security Operate Slope Standard Operate Slope Restraint Zone CT Supervision Current Input I01 IOP Differential Element 2 pe Slo e 1 Slop 20 15 10 Current (amperes) 5 0 5 0 –5 0 Internal Fault Detection Time Trip Output Fault Inception Current Input I18 IRT External Fault IO1 IO2 Fault Detection Logic (<1 cycle) Internal Fault Differential element operation in less than one cycle for internal faults.. the relay enters a high-security mode and dynamically selects a higher slope for the differential elements. the element alarms and can be used to generate an external alarm and/or block the zone. 100 50 0 –50 IO1 Current (amperes) 50 0 –50 IO2 CT Supervision For each zone. External faults are detected by directional elements within the relay. sensitive current differential elements detect differential current resulting from a differential element that is not well balanced (i.e. Voltage Element Supervise current differential tripping within the relay using voltage elements. .and zero-sequence overvoltage elements for each of the three analog voltage quantities measured. When an external fault is detected. Overcurrent Elements Choose from ten overcurrent curves for each current input. making them more secure during the fault. Each torque-controlled. There is also one level of instantaneous and definite-time elements available for each current input. Internal breaker failure is determined by predefined protection schemes that allow different types of trip signals and current flow conditions. Note that the SEL-487B automatically includes the Zone 4 currents in Zone 3 when Disconnect Switch DS3 is closed (Figure B). Figure A.75 cycles to reduce breaker failure coordination times. External breaker failure device inputs can be substituted for the internal breaker failure schemes. Connect the digital inputs from the busbar disconnect and breaker auxiliary contacts directly to the relay.Breaker Failure Detection The SEL-487B includes complete breaker failure protection. SELogic control equations and zone selection logic will correctly assign the currents to the differential elements. for each terminal. open-pole detection logic detects open-pole conditions in fewer than 0. while providing individual or identical responses to each breaker failure condition. Dynamic Zone Configuration The SEL-487B dynamically assigns the input currents to the correct differential elements without the need for additional auxiliary relays. Open-Phase Detection Open-Phase Detection High-speed. 4 . even for complex bus arrangements as shown (Figure A). Figure B. including retrip. 52 3 3 SEL-487B Check Zone Zone 1 52 3 3 Zone 2 52 3 52 52 52 3 3 TR 1 TR 2 FD 1 FD 2 FD 3 Zone 1 Zone 2 Check Zone This is a basic example of a check zone supervising only two three-phase zones. Settings created offline can be transferred to the SEL-487B by using a PC communications link. with one SEL-487B per phase. Configure a check zone for every phase. The system automatically checks interrelated settings and highlights out-of-range settings. when implemented. acSELerator acSELerator ® Software QuickSet® SEL-5030 Develop SEL-487B settings and busbar configurations offline with acSELerator QuickSet. Three Independent Check Zones Supervise Up to Six Differential Bus Zones In complex busbar layouts. will block differential element misoperations that occur under open or shorted CT conditions. The CT detection logic monitors the CT terminals in every bus zone to detect when a contributing CT has failed. so your settings files can be documented for easier validation and commissioning.Advanced Open CT Detection Logic The patented open CT detection logic improves the security of the current differential element. Graphical Logic Editor (GLE) Simplify the process of configuring your SEL-487B using the GLE in acSELerator QuickSet SEL-5030 Software. 5 . The GLE allows you to view your SELogic equations graphically. acSELerator ® graphical logic editor (GLE). and save diagrams with your QuickSet settings. Convert existing SELogic control equations to easy-to-read diagrams. the SEL-487B uses disconnect auxiliary contact status to define current differential bus zones and supervises these zones with the independent “check zone” feature to prevent misoperation due to discrepancy. independent of disconnect auxiliary contact status. encompassing all terminals at the station (except bus coupler and sectionalizing breakers). with independent pickup and slope settings Three-Relay Bus Protection Application— For Up to 21 Terminals Three independent check zones are provided per relay. It assures current differential bus zones will not misoperate due to terminals that cannot be properly measured. This advanced logic. Check Zone Key Features • Provides secure supervision for bus zones • Supervises bus zones independently of terminal auxiliary disconnect status • Processes its logic independently of all bus zones • Fits a wide variety of applications and protection philosophies. Optionally. Advanced Display and Controls for Next-Generation Substation Automation and Integration Rotating display automatically scrolls between custom metering displays. Enhanced Front-Panel HMI Improve efficiency and simplify installation with more target LEDs and operator buttons. alarms.000 events time-stamped in the Sequential Events Recorder (SER). The front-panel LCD shows the latest 200 of the 1. Easy-to-use keypad aids simple navigation and set-point adjustment. add four tricolored operator pushbuttons to control even more circuit breakers. clear. Detailed. clear. Eliminate RTU-to-relay wiring with 32 remote control points. • Meet operator control needs by modifying the 12 operator buttons to replace traditional panel switches. trip conditions with 24 target LEDs. SEL provides a worldwide. Set. Incorporate the remote control points into your control scheme via SELogic control equations. Set. programmable target LEDs with user-configurable labels give fast and simple information to assist dispatchers and line crews in rapidly restoring power. or pulse local control points with the programmable front-panel pushbuttons and display. such as trip and group selection. or pulse remote control points via serial port commands. Programmable operator pushbuttons and configurable labels provide local switches to replace traditional panel switches. or configure the LEDs for specific applications. Breaker status indication. • Indicate relay state and various Service control switch. 6 . Apply remote control points for SCADA-type control operations. Program the local control points to implement your control scheme via SELogic control equations.Automation and Control The SEL-487B control logic can replace the following: • Traditional panel control switches • RTU-to-relay wiring • Traditional latching relays • Traditional indicating panel lights • Panel meters Eliminate traditional panel control switches with 32 local control points. The 7U and 9U chassis have options for an additional eight target LEDs and four operator control buttons. Optionally. and preconfigured fundamental line quantity displays. add eight tricolored target LEDs. event summaries. ten-year product warranty and —40° to +85°C operating temperature range—the best in the industry. and control more circuit breakers. and element status information. and more. telephone. such as input/output. current. acSELerator Analytic Assistant® SEL-5601 Software helps you compare event reports from multiple relays. • Zone information displays primary or secondary current and voltage for each terminal. in either 15-. The latest 200 events are also viewable via the front-panel LCD. The SEL-487B stores up to 480 cycles (8 seconds). The relay SER stores the latest 1. User-selected internal or external triggers can be used to generate oscillographic event reports that include voltage. The polarity of each CT and the bus zones in each of the protective zones at the station are also included. 7 . and angles for each terminal. Trigger messages via local display. at 24 samples per cycle in nonvolatile memory. which are available through the SER command.Monitoring and Metering Access Useful Information • Metering quantities include primary and secondary voltage and current magnitudes. or 120cycle event reports. 30-. Relay settings are appended to the end of each report. element pickup/dropout. • Battery monitoring provides warning and alarm thresholds that can be monitored with the SEL-2032 Communications Processor and the SEL-3530 Real-Time Automation Controller (RTAC). change of state. Illustrated here is security during MOV arrester conduction. • Differential metering shows the operating and restraint currents for each zone as well as the reference current.000 events. Simplify System Testing and Post-Fault Analysis The SEL-487B event-reporting capabilities help improve understanding of even the most complex protective scheme operations. Illustrated here is security during an external fault with CT saturation. Items that trigger an SER entry are selectable and can include as many as 250 monitoring points. or other devices. 60-. enhancing this powerful tool’s analytic capabilities. pager. Eliminate external recorder and metering requirements with oscillographic and binary COMTRADE event reports and SER. SER Gain a broad perspective of relay element operation with the SER in the SEL-487B. Telnet protocols. 1 Vac steps Accuracy Pickup accuracy ±10%.332.1890 • Fax: +1. V02. Washington USA Tel: +1.1 VA @ 1 A Power Supply Ratings 125/250 Vdc or 120/230 Vac Range 85—300 Vdc or 85—264 Vac 48/125 Vdc or 120 Vac Range 38—140 Vdc or 85—140 Vac 24/48 Vdc Range 18—60 Vdc Station DC Battery System Monitor Specifications Operating range 0—350 Vdc Input sampling rate 2 kHz Processing rate 1/6 cycle Maximum operating time ≤ 1.com • info@selinc. .and 12-samples/cycle 100 summaries Sequential Events Recorder Sequential Events Recorder storage 1000 entries Trigger elements 250 monitoring points Processing rate 12 samples per cycle Pullman.332.. PF00063 • 20120621 . ± 2 Vdc (DC1RP) ±3%. 100 A for 1 second. and V03 >30 V ±1% I01. linear to 20 A symmetrical 100 A for 1 second.509. I02.com © 2005—2012 by Schweitzer Engineering Laboratories. 15—300 Vdc. . and web server capabilities Ethernet connection media options: 10/100BASE-T twisted-pair network 10/100BASE-FX fiber-optic network Relay provides many I/O port options (9U version shown). ±2 Vdc (all elements but DC1RP) Serial Communications Ports Three rear-panel and one front-panel EIA-232 ports SEL ASCII commands.02 • INOM IOP. salt. IRT Per-phase instantaneous metering (steady state) V01.selinc.SEL-487B Bus Differential and Breaker Failure Relay General Specifications AC Voltage Inputs (3 total) 300 V continuous across the terminals (connect any voltage up to 300 Vac) 600 Vac for 10 seconds Burden ≤0. 1 Vdc steps AC ripple setting 1—300 Vac. 250 A for 1 cycle Burden ≤0.5 seconds (element DC1R) ≤ 1. chlorine. and moisture. Instantaneous differential metering per zone (steady state) ±5. .5 VA @ 5 A 1 A nominal 3 A continuous.0° Conformal Coating Option Protect equipment from harsh environments and airborne contaminants. SEL Fast Messages. Chassis Options 9U chassis supports up to 4 optional I/O boards 7U chassis supports up to 2 optional I/O boards Event Reports Volatile memory Nonvolatile memory Resolution Event Summary Storage 5 seconds of back-to-back event reports sampled at 8 kHz At least 5 event reports of a 3-second duration sampled at 8 kHz 4. ± 0. Inc. FTP. linear to 100 A symmetrical 500 A for 1 second.5 cycles (all elements but DC1R) Setting Range DC settings OFF. I21 ±3% ± 0.5 VA @ 5 A AC Current Inputs (21 total) 5 A nominal 15 A continuous.509.7990 • www. Metering Accuracy All metering accuracies are based on an ambient temperature of 20°C and nominal frequency. 1250 A for 1 cycle Burden ≤0. 500 A for 1 second. ± 2. DNP3 Serial data speed 300—57600 bps Ethernet Communications Options Provides IEC 61850. such as hydrogen sulfide.004 • INOM .0%. DNP3 LAN/WAN.