ZXDU68 W201DC Power System Product Description Product Version: V5.0 ZTE CORPORATION No. 55, Hi-tech Road South, ShenZhen, P.R.China Postcode: 518057 Tel: +86-755-26771900 Fax: +86-755-26770801 URL: http://support.zte.com.cn E-mail:
[email protected] LEGAL INFORMATION Copyright © 2015 ZTE CORPORATION. The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations. All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATION or of their respective owners. This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein. ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter herein. ZTE CORPORATION reserves the right to upgrade or make technical change to this product without further notice. Users may visit the ZTE technical support website http://support.zte.com.cn to inquire for related information. The ultimate right to interpret this product resides in ZTE CORPORATION. Revision History Revision No. Revision Date Revision Reason R1.0 2015-09-10 First edition Serial Number: SJ-20150930111933-001 Publishing Date: 2015-09-10 (R1.0) SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Contents About This Manual ......................................................................................... I Chapter 1 System Introduction and Features.......................................... 1-1 1.1 System Introduction............................................................................................ 1-1 1.2 System Features ................................................................................................ 1-1 Chapter 2 Configuration List ..................................................................... 2-1 Chapter 3 System Structure and Components........................................ 3-1 3.1 Structure Overview............................................................................................. 3-1 3.1.1 External View and Dimensions .................................................................. 3-1 3.1.2 Internal Structure...................................................................................... 3-2 3.2 Power Supply Chassis........................................................................................ 3-3 3.3 ZXD3000 Rectifier .............................................................................................. 3-5 3.4 Centralized Supervision Unit ............................................................................... 3-7 3.5 Signal Interface Unit ........................................................................................... 3-9 Chapter 4 Rectifier Specifications ............................................................ 4-1 4.1 ZXD3000 (V5.0) Rectifier Specifications .............................................................. 4-1 4.1.1 Input Features.......................................................................................... 4-1 4.1.2 Output Features ....................................................................................... 4-3 4.1.3 Power Decrease With High Temperature ................................................... 4-3 4.2 ZXD3000 (V5.5) Rectifier Specifications .............................................................. 4-4 4.2.1 Input Properties........................................................................................ 4-4 4.2.2 Output Property........................................................................................ 4-6 4.2.3 Overtemperature Power Property .............................................................. 4-7 Chapter 5 Technical Specifications .......................................................... 5-1 Chapter 6 Compliant Standards................................................................ 6-1 Appendix A Alarm List .............................................................................. A-1 Appendix B Electrical Connection Diagram ........................................... B-1 Glossary .......................................................................................................... I I SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential This page intentionally left blank. II SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential About This Manual Purpose This manual applies to the ZXDU68 W201 DC Power System. The ZXDU68 W201 is an outdoor power system and provides power for -48 V communications equipment. This manual describes the system structure, characteristics, and configuration. Intended Audience This manual is intended for: l Planning engineers l Maintenance engineers What Is in This Manual This manual contains the following chapters/appendices: Chapter/Appendix Summary Chapter 1, System Describes the system overview and features. Introduction and Features Chapter 2, Configuration List Describes the configuration list of the ZXDU68 W201 system. Chapter 3, System Structure Describes the system structure, power supply chassis, ZXD3000 and Components (V5.0) or ZXD3000 (V5.5) rectifiers, Centralized Interface Unit (CSU), and signal interfaces unit. Chapter 4, Rectifier Describes the ZXD3000 (V5.0) rectifier and ZXD3000(V5.5) rectifier Specifications specifications, including technical specifications, input features, output features and the feature of power decrease with high temperature. Chapter 5, Technical Describes the technical specifications of the ZXDU68 W201 system. Specifications Chapter 6, Compliant Describes the ZXDU68 W201 system compliance standards. Standards Appendix A, Alarm List Describes the alarm names, default alarm levels and output relays. Appendix B, Electrical Provides the electrical connection diagram of the ZXDU68 W201 Connection Diagram system. Conventions This manual uses the following typographical conventions: I SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Typeface Meaning Danger: indicates an imminently hazardous situation. Failure to comply can result in death or serious injury, equipment damage, or site breakdown. Warning: indicates a potentially hazardous situation. Failure to comply can result in serious injury, equipment damage, or interruption of major services. Caution: indicates a potentially hazardous situation. Failure to comply can result in moderate injury, equipment damage, or interruption of minor services. Note: provides additional information about a certain topic. II SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 1 System Introduction and Features Table of Contents System Introduction....................................................................................................1-1 System Features ........................................................................................................1-1 1.1 System Introduction The ZXDU68 W201 system is an outdoor DC power system. It provides -53.5 V power for communication equipment. l Three-phase five-wire (L1/L2/L3/N/PE) AC input, 127 V/220 V (phase voltage/line voltage), 50 Hz/60 Hz. l In full configuration, the system is equipped with four ZXD3000 (V5.0) rectifiers or four ZXD3000 (V5.5) rectifiers, which form a rated output power of 12 kW (48 V - 57.6 V). 1.2 System Features Efficient Rectifiers l Peak efficiency: ≥ 96% l Efficiency with the rated load: ≥ 95% Automatically Switching the Rectifiers to the Sleep Mode The ZXDU68 W201 switches one or more rectifiers to the sleep mode according to the load power. The power of a rectifier in sleep mode is not larger than 4 W. A Wide Range of Input Voltage A wide range of input line voltage (85 V to 295 V) makes the ZXDU68 W201 suitable for areas with unstable power sources. Accessible via Web Explorer The ZXDU68 W201 can be remotely managed through a computer installed with Web explorer anywhere if Ethernet is available. 1-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Managing Data in Batches Users can set the parameters in batches, copy records and upgrade programs via a USB flash drive. Professional Monitoring and Management l The transmission speed is high via CAN bus. l Users can press the QUY button of a rectifier to query the data of the rectifier or control it. Flexible Monitoring Networking The ZXDU68 W201 provides input & output relays, RJ45 Ethernet interface, and RS232 interface. The ZXDU68 W201 supports multiple monitoring networking modes via Telnet, HTTP, FTP and SNMP. 1-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 2 Configuration List For the configuration list of the ZXDU68 W201 system, refer to Table 2-1. Table 2-1 Configuration List of the ZXDU68 W201 System Component Configuration Rectifier Model ZXD3000 (V5.0)/ZXD3000 (V5.5) Quantity 4 sets (when fully configured) Centralized Model CSU500B Supervision Unit Software version V1.12.0 (CSU) AC distribution unit AC input mode Three-phase five-wire (L1/L2L3//N/PE) AC input circuit 1×63A/3P MCB breaker AC auxiliary output Optional 1×16A/1P MCB and one 10 A three-hole socket AC SPD Class C DC distribution unit Battery input circuit l Two battery input branches breakers l 2×100 A MCBs Power-off protection LLVD1+BLVD DC load output Twelve load output branches: l LLVD1: 6×32 A +2×16 A MCBs l BLVD: 1×63 A + 1×32 A + 1×16 A + 1×10 A MCBs DC SPD One set Signal Interface Unit - Provides multiple interfaces for supervision and networking. Temperature sensor - One set Battery - Optional 50 Ah lithium iron phosphate battery Floor-mounted set - Optional Pole-mounted set - Optional 2-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description This page intentionally left blank. 2-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components Table of Contents Structure Overview.....................................................................................................3-1 Power Supply Chassis ...............................................................................................3-3 ZXD3000 Rectifier ......................................................................................................3-5 Centralized Supervision Unit ......................................................................................3-7 Signal Interface Unit ...................................................................................................3-9 3.1 Structure Overview 3.1.1 External View and Dimensions For the external view and dimensions of the ZXDU68 W201 system, see Figure 3-1. Figure 3-1 External View and Dimensions • Unit: mm For a description of the dimensions, refer to Table 3-1. Table 3-1 Cabinet Dimensions Item Description Cabinet dimension 1000 mm×600 mm×550 mm (H × W × D) 3-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Item Description Reserved equipment space 19 inches in width, 6U in height Battery space 3U in height 3.1.2 Internal Structure For the internal structure of the ZXDU68 W201 system, see Figure 3-2. Figure 3-2 Internal Structure of the ZXDU68 W201 System 1. Door sensor 3. GND busbar 5. Heat exchanger 2. Power supply chassis 4. PE busbar For a description of the components, refer to Table 3-2. Table 3-2 Component Description Component Description Power supply chassis Provides power output distribution and converts AC to DC. For the further details, refer to "3.2 Power Supply Chassis". Heat exchanger For heat dissipation of the cabinet. GND busbar Connects RTN cables of DC loads and positive cables of battery packs. PE busbar Connects the AC input PE cables. 3-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components 3.2 Power Supply Chassis Overview The power supply chassis converts AC to DC and provides DC output distribution. It is installed inside the cabinet. For the structure of the power supply chassis, see Figure 3-3. Figure 3-3 Power Supply Chassis 1. DC distribution unit 3. Centralized Supervision 4. AC distribution unit 2. Signal Interface Unit (SIU) Unit (CSU) 5. Rectifiers For a description of the components, refer to Table 3-3. Table 3-3 Power Supply Chassis Component Description Component Description AC distribution unit Provides AC input, AC output and AC output surge protection. For the further details, refer to Table 3-4. DC distribution unit Provides battery input, DC output and DC output surge protection. For the further details, refer to Table 3-5. Signal Interface Unit Provides multiple interfaces for supervision and networking. For the further details, refer to "3.5 Signal Interface Unit". Centralized Supervision Unit Collects the power device operation data and manages the power device. For the further details, refer to "3.4 Centralized Supervision Unit". 3-3 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Component Description Rectifiers Converts AC power to DC power. For the further details, refer to "3.3 ZXD3000 Rectifier". AC Distribution Unit For the structure of AC distribution unit, see Figure 3-4. Figure 3-4 Structure of AC Distribution Unit For a description of the components, refer to Table 3-4. Table 3-4 AC Distribution Unit Label Component Description AC Input AC input connection Connects the AC input L1/L2/L3/N/PE cables. terminals AC input circuit breaker Controls the connection and disconnection of AC input power. AC Output Auxiliary AC output l AC output circuit breaker: Controls the connection and disconnection of AC output power. l Three-hole socket: Provides AC output power. AC SPD AC surge protection Provides surge protection for the AC input power. device DC Distribution Unit For the structure of DC distribution unit, see Figure 3-5. Figure 3-5 Structure of DC Distribution Unit For a description of the components, refer to Table 3-5. 3-4 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components Table 3-5 DC Distribution Unit Label Component Description DC SPD DC surge protection Provides surge protection for a DC circuit. device LLVD1 DC output circuit Controls the connection and disconnection of a DC breakers output circuit. BLVD BATT1, BATT2 Battery input circuit Controls the connection and disconnection of a breakers battery circuit. LLVD1 RST LLVD1 RST button Used to close the LLVD1 contactor to connect the LLVD1 DC output branches. BLVD RST BLVD RST button Used to close the BLVD contactor to connect the battery branches. 3.3 ZXD3000 Rectifier Function The ZXD3000 (V5.0/V5.0R03/V5.5) rectifiers convert AC to DC, power DC loads and charge the batteries. External View For the external view of the ZXD3000 (V5.0/V5.0R03) rectifier, see Figure 3-6. Figure 3-6 ZXD3000 (V5.0/V5.0R03) Rectifier External View 1. Indicators 2. Fan 3. QUY button For the external view of the ZXD3000 (V5.5) rectifier, see Figure 3-7. 3-5 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Figure 3-7 ZXD3000 (V5.5) Rectifier External View 1. Indicators 2. Fan 3. QUY button Buttons and Indicators l Press and hold the QUY (query) button of a rectifier for 5 seconds and then the CSU displays the rectifier's main information screen. l The indicators display the operational status of the rectifier. For a description of the indicators, refer to Table 3-6. Table 3-6 Rectifier Operational Status Indicator Operational Status Power Run Alarm Fault Lit Lit - Not lit Operating with Stable Voltage Flashing Not lit - Not lit Sleep Lit Flashing - Not lit Output Current Limit Lit - Flashing - Communication Failure Lit - Lit - Alarm Lit Not lit - Lit Fault • "-" means that the status of the indicator is not relevant to the condition. Interfaces Input and output interfaces are laid at the back of the rectifier. For the interface layout of the rectifier, see Figure 3-8. For a description of the pin definitions, refer to Table 3-7. The interfaces complete the electrical and signal connections between the rectifier and the ZXDU68 W201 power system. Figure 3-8 Rectifier Interfaces 3-6 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components Table 3-7 Pin Definitions of Rectifier Interfaces Interface Name Pin No. Signal Function Definition AC input 1-6 L Connects the AC input phase cable. interfaces 7 - 12 N Connects the AC input neutral cable. 18 - 20 PE Connects the protection ground. - 13 - Reserved Phase detection 14 AA Locates the phase where an operating rectifier is. interfaces 15 AB CAN 16 CAN- A rectifier communicates with other devices communication through the interfaces. For example, a rectifier 17 CAN+ detection transmits data to the CSU, and the CSU issues interfaces commands to a rectifier. DC output 21 - 28 OUTPUT+ Provide DC output power. interfaces 29 - 36 OUTPUT- Hot-plug pins 37, 38 Hot-plug pin (+) Prevent sparks when a rectifier is installed into the ZXDU68 W201 system. 39, 40 Hot-plug pin (-) 3.4 Centralized Supervision Unit Overview The Centralized Supervision Unit (CSU CSU500A/CSU500B) is the foreground monitoring unit of the system. It monitors the AC distribution, DC distribution, rectifiers and batteries of the system. Functions l Management à Supports the battery charging, discharging and test management. à Supports automatic sleep of the rectifiers and thereby saves energy. à Supports the export of history records through a USB flash drive. à Supports data query, parameter setting and system control through the LCD. l Alarm When faults occur on the power system, the CSU reports alarms and takes protection measures. l Monitoring 3-7 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description à Collects the operation data of the power system and monitors its operating status in real time. à Transmits data to the supervision center (SC), and monitors the power system remotely in accordance with the orders received from the SC. l Wireless communication Supports GPRS network mode, having SMS notice and the E-mail notice function. l Web functions After the CSU is connected to the network, you can access the CSU by using IE7 or a later version. External View For the external view of the CSU500A/CSU500B, see Figure 3-9. Figure 3-9 CSU External View 1. Buttons 3. Indicators 5. USB interface 2. LCD 4. RJ45 Ethernet interface Interfaces l USB interface à Supports USB flash drives but does not support SD card or other portable storage devices, such as portable hard disks, MP3 or MP4. à The system format of the USB files is FAT. l RJ45 Ethernet interface à The Ethernet interface rate is 10M/100M (adaptive). à The Ethernet interface supports multiple monitoring networking modes through Telnet, HTTP, FTP and SNMP. Indicators The indicators display the operational status of the CSU and the system. For a description of indicators, refer to Table 3-8. 3-8 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components Table 3-8 CSU Operational Status Indicator Operational Status Power Run Alarm Lit Flashing Not lit Operating Normally Lit Lit or not lit - Faulty Lit Flashing Flashing Alarm Not lit Not lit Not lit No Operating • "-" means that the status of the indicator is not relevant to the condition. Buttons User can query the information and set the parameters through the menu buttons. For a description of the functions of CSU buttons, refer to Table 3-9. Table 3-9 Buttons Buttons Buttons names Function ▲ Up/Direction button l Scrolls pages up. l Moves to the previous item. l Increases numerical values. ▼ Down/Direction button l Scrolls pages down. l Moves to the next item. l Decreases numerical values. ◄ Left/Direction button Moves the cursor to the left/change page. ► Right/Direction button Moves the cursor to the right/change page. Ent Confirm button l Displays the lower-level screen. l Saves modifications. Esc Return button l Returns to the upper-level screen. l Cancels modifications. <▲+Ent> – The user needs to press the ▲ button and the Ent button at the same time, it displays help information of the current menu. 3.5 Signal Interface Unit The Signal Interface Unit (SIU) contains the SIB board. For the structure of SIU, see Figure 3-10. 3-9 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Figure 3-10 Signal Interface Unit 1. SIB 3. Cabling hole 2. Interface designation 4. Reserved hole The SIB provides various supervision interfaces including input and output relay interfaces, background communication interfaces, and environment detection interfaces. For the layout of the interfaces on the SIB, see Figure 3-11. Figure 3-11 Supervision Interfaces on the SIB For a description of the interfaces on the SIB, refer to Table 3-10. 3-10 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 3 System Structure and Components Table 3-10 Supervision Interfaces on the SIB Lable Interface Description Input Relay Interfaces X3 In-relay 1, 2 In-relay 1 is used to detect the alarms of the heat exchanger. The normal status is "Open", the alarm status is "Close", and the alarm level is "Critical". The user can customize the alarm for in-relay 2 through the supervision unit. By default, the alarm name is "In-Relay-2#", the normal status is "Close", the alarm status is "Open", and the alarm level is "Mask" (no alarm). X4 In-relay 3, 4 l If there is a smog sensor, in-relay 3 is used to detect the alarms of the smog sensor. The alarm name is "Smoke Alarm", the status is "Close", and the alarm level is "Critical". l If there is no smog sensor, the user can customize the alarm for in-relay 3. By default, the alarm name is "In-Relay-3#", the status is "Close", and the alarm level is "Mask" (no alarm). The user can customize the alarm for in-relay 4 through the supervision unit. By default, the alarm name is "In-Relay-4#", the normal status is "Close", the alarm status is "Open", and the alarm level is "Mask" (no alarm). Output Relay Interfaces X14 Out-relay 1, 2 l Output relays 1 to 6 correspond to the alarm codes A1 to A6 respectively in the CSU software. X15 Out-relay 3, 4 l Multiple alarms can share one output relay. For a X16 Out-relay 5, 6 description of the alarms, refer to "Appendix A Alarm List". X17 Out-relay 7, 8 l Output relay 7: reserved to control the diesel generator. l Output relay 8: reserved to control the emergency lighting. X18 CSU fault out-relay Output relay for the CSU fault. Communication Interfaces X11 RS232 communication X11 and X13 cannot be used at the same time. X22 RS232 communication X22 multiplexes X11. X12 RS485 communication - (independent) X13 RS485 communication X11 and X13 cannot be used at the same time. (multiplex) Environment Detection Interfaces X2 Flood alarm To connect a flood sensor. 3-11 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Lable Interface Description X5 Door magnet alarm To connect a magnetic door switch. X6 Battery 1 temperature To connect the temperature sensor for battery pack 1. X7 Battery 2 temperature To connect the temperature sensor for battery pack 2. X8 Battery 3 temperature To connect the temperature sensor for battery pack 3. X9 Battery 4 temperature To connect the temperature sensor for battery pack 4. X10 Environment To connect an ambient temperature sensor. temperature 3-12 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 4 Rectifier Specifications Table of Contents ZXD3000 (V5.0) Rectifier Specifications.....................................................................4-1 ZXD3000 (V5.5) Rectifier Specifications.....................................................................4-4 4.1 ZXD3000 (V5.0) Rectifier Specifications 4.1.1 Input Features Overview The ZXD3000 (V5.0) rectifier automatically adjusts its operational status according to the AC input voltage. The input features include the under-voltage protection, over-voltage protection, and power limit. Under-Voltage Protection When the AC input voltage is lower than the under-voltage threshold, the rectifier automatically shuts down and provides no output. Meanwhile, the alarm indicator is on. After the AC input voltage reaches the under-voltage recovery threshold, the rectifier automatically recovers. The under-voltage recovery threshold = the AC input under-voltage threshold + the return difference. The AC input under-voltage threshold is (85 ± 5) V and the return difference ranges from 8 V to 12 V. Over-Voltage Protection When the AC input voltage is higher than the over-voltage threshold, the rectifier automatically shuts down and provides no output. Meanwhile, the alarm indicator is on. After the AC input voltage falls to the over-voltage recovery threshold, the rectifier automatically recovers. The over-voltage recovery threshold = the AC input over-voltage threshold – the return difference. The AC input over-voltage threshold is (295 ± 5) V and the return difference ranges from 5 V to 10 V. 4-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Power Limit The rectifier limits its output power according to the input voltage. See Figure 4-1 for the power limit feature of the rectifier when the following conditions are met. l Environment temperature: -25 °C to 55 °C l Output voltage of the rectifier: 48 V to 59.5 V Figure 4-1 Power Limit Feature 1. Under-voltage threshold 2. 55% power (110 V) 4. Over-voltage threshold (85±5 V) 3. Maximum power (176 V) (295±5 V) For the relationship between the AC input voltage and the output power, refer to Table 4-1. Table 4-1 Relationship Between AC Input Voltage and Output Power AC Input Voltage Output Power (Percentage of the Maximum Output Power) ≤ (85 ± 5) V 0 (85 ± 5) V to 110 V Linear power limit Output power percentage: 40% to 55% 110 V to 176 V Linear power limit Output power percentage: 55% to 100% 176 V to (295 ± 5) V 100% > (295 ± 5) V 0 • Maximum output power: 3000 W 4-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 4 Rectifier Specifications 4.1.2 Output Features See Figure 4-2 for the output features of the ZXD3000 (V5.0) rectifier when the following conditions are met. l AC input voltage of the rectifier: 176 V to 295 V l Environment temperature: -25 °C to +55 °C Figure 4-2 Output Features As shown in Figure 4-2, the output features of the rectifier can be concluded as follows: l When the output voltage ranges from 42 V to 48 V, the maximum output current is constant. l When the output voltage ranges from 48 V to 59.5 V, the maximum output power is constant. l When the output voltage is lower than 36 V, the rectifier restarts for protection. When the environment temperature ranges from -25 °C to +55 °C and the input voltage ranges from 85 V to 176 V, the rectifier still has the above output features. However, because of the power limit feature, when the input voltage ranges from 85 V to 176 V, the output power cannot reach the highest percentage (100%). Therefore, the input voltage affects the maximum output power and maximum output current. 4.1.3 Power Decrease With High Temperature The feature of power decrease with high temperature refers to that the output power of the ZXD3000 (V5.0) rectifier decreases with the increase of the environment temperature when the environment temperature reaches the over-temperature threshold. For the feature of power decrease with high temperature, see Figure 4-3. 4-3 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Figure 4-3 Power Decrease With High Temperature For a description of the feature, refer to Table 4-2. Table 4-2 Power Decrease With High Temperature Environment Temperature Output Power (Percentage of the Maximum Power) -40 °C to +55 °C 100% +55 °C to 75 °C Linear power limit The output power decreases with the increase of the temperature and is not less than 50% when the temperature is 75 °C. > 75 °C 0% (the rectifier shuts down for protection against over-temperature) • Maximum output power: 3000 W 4.2 ZXD3000 (V5.5) Rectifier Specifications 4.2.1 Input Properties Undervoltage Protection When the AC input voltage is lower than the configured undervoltage protection threshold, undervoltage protection is enabled. The ZXDU68 W201 rectifier is shut down, there is no output current, and the alarm indicator is lit. When the voltage increases to the undervoltage restoration threshold, the ZXDU68 W201 rectifier automatically resumes operating properly. The undervoltage protection threshold of the ZXDU68 W201 rectifier is 80 V±5 V, the hysteresis voltage is 5 V to 12 V, and the undervoltage restoration threshold equals the undervoltage protection threshold plus the hysteresis voltage. 4-4 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 4 Rectifier Specifications Overvoltage Protection When the AC input voltage is higher than the configured overvoltage protection threshold, overvoltage protection is enabled. The ZXDU68 W201 rectifier is shut down, there is no output current, and the alarm indicator is lit. When the voltage decreases to the overvoltage restoration threshold, the ZXDU68 W201 rectifier automatically resumes operating properly. The overvoltage protection threshold of the ZXDU68 W201 rectifier is 300 V±5 V, the hysteresis voltage is 5 V to 10 V, and the overvoltage restoration threshold equals the overvoltage protection threshold minus the hysteresis voltage. Power Limitation Based on the Input Voltage The ZXDU68 W201 rectifier can limit the output power based on the input voltage. Figure 4-4 shows power limitation based on the input voltage when the following conditions are met: l Environmental temperature: -25 °C–+55 °C. l Output voltage: 52.5 V–59.5 V. If the output voltage is between 42 V–52.5 V, the maximum output current should be constant. Figure 4-4 Power Limitation Based on the Input Voltage 1. Undervoltage protection 2. 55% power (110 V) 4. Overvoltage protection threshold (80 V±5 V) 3. Maximum power (176 V) threshold (300 V±5 V) Figure 4-4 shows the relationship between the AC input voltage and the output power of the ZXDU68 W201 rectifier. For a description of the relationship, refer to Table 4-3. Table 4-3 Descriptions of the Relationship Between the AC Input Voltage and the Output Power of the ZXDU68 W201 Rectifier AC Input Voltage Output Power (Percentage of the Maximum Power) ≤ 80 V±5 V 0% (80 V±5 V)–110 V 40%–55% 4-5 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description AC Input Voltage Output Power (Percentage of the Maximum Power) 110 V–176 V 55%–100% 176 V–(300 V±5 V) 100% > 300 V±5 V 0% 4.2.2 Output Property Figure 4-5 shows the output property of the ZXDU68 W201 rectifier when the following conditions are met: l AC input voltage: 176 V–295 V. l Environmental temperature: -25 °C–+55 °C. Figure 4-5 Output Properties of the ZXDU68 W201 Rectifier Figure 4-5 shows the output property of the ZXDU68 W201 rectifier in the following conditions: l Point A corresponds to output voltage 58 V, and the typical output current capacity is 52.5 A. l Point B corresponds to output voltage 52.5 V, and the typical output current capacity is 58 A. l Area C corresponds to output voltage lower than 42 V. In this area, the ZXDU68 W201 rectifier must operate stably and reliably, basic requirements for connecting power units in parallel must be met, and there is no mandatory requirement for the output properties. 4-6 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 4 Rectifier Specifications l When the output voltage is between 42 V and 52.5 V, the output current is constant. l When the output voltage is lower than 36 V, the ZXDU68 W201 rectifier restarts for protection. When the environmental temperature is between -25 °C and +55 °C, and the input voltage is between 85 V and 176 V, the ZXDU68 W201 rectifier still has the above output properties. However, the output power of the ZXDU68 W201 rectifier cannot reach the maximum value due to input-voltage-based power limitation. Therefore, the maximum power and maximum output current are affected by the input voltage. 4.2.3 Overtemperature Power Property When the environmental temperature exceeds the overtemperature threshold, the output power of the ZXDU68 W201 rectifier decreases with the rise in temperature. Figure 4-6 shows the overtemperature power property of the ZXDU68 W201 rectifier. For a description of the property, refer to Table 4-4. Figure 4-6 Overtemperature Power Property Table 4-4 Overtemperature Power Property Descriptions Environmental Output Power (Percentage of the Maximum Power) Temperature -40 °C–+55 °C 100% +55 °C–+75 °C The output power decreases linearly as the temperature rises. When the environmental temperature reaches 75 °C, the output power is no lower than 50% of the maximum power. > 75°C 0% (The ZXDU68 W201 rectifier is shut down for protection due to overtemperature.) 4-7 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description This page intentionally left blank. 4-8 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 5 Technical Specifications The ZXDU68 W201 system satisfies the following technical specifications. l For a description of the environment specifications, refer to Table 5-1. l For a description of the system specifications, refer to Table 5-2. l For a description of the AC electrical specifications, refer to Table 5-3. l For a description of the DC electrical specifications, refer to Table 5-4. l For a description of the supervision interfaces specifications, refer to Table 5-5. l For a description of the structure specifications, refer to Table 5-6. Table 5-1 Environment Specifications Item Specification Operational temperature -25 °C to +55 °C Storage temperature -40 °C to +80 °C Relative humidity 10% to 95% (non-condensing) Altitude l 0 to 2000 m: 100% output power. l 2000 m to 3000 m: The power derating percentage is 1% for each 100 m increase in altitude above 2000 m. Other requirements l No conductive dusts or corrosive gases. l No explosion hazard, no shake or jolt. l The cabinet should be stable and erect. l No strong Electromagnetic Interference (EMI). Table 5-2 System Specifications Item Description Rated output power 12 kW (–48 V to –57.6 V) In full configuration of four rectifiers Rectifier power limit -40 °C to 55 °C Output power percentage: 100% controlled by environment 55 °C to 75 °C Linear power limit temperature The output power decreases with the increase of the temperature and is not less than 50% when the temperature is 75 °C. > 75 °C Output power: 0 5-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Item Description Rectifier power limit ≤ (85 ± 5) V Output power: 0 controlled by AC input (85 ± 5) V to 110 V Linear power limit voltage Output power percentage: 40% to 55% 110 V to 176 V Linear power limit Output power percentage: 55% to 100% 176 V to (295 ± 5) V Output power percentage: 100% > (295 ± 5) V Output power: 0 System efficiency l Peak efficiency: ≥ 95.5% l Efficiency with the rated load: ≥ 94.5% Equipment noise ≤ 65 dB(A) Mean Time Between Failures MTBF≥3.2×105 h Design service time 10 years to 15 years Table 5-3 AC Electrical Specifications Item Description AC input features AC input mode Three-phase five-wire (L1/L2/L3/N/PE) AC input voltage l Rated input voltage: 127 V/220 V (phase voltage/line voltage) l Line voltage range: 85 V to 295 V AC input frequency l Rated frequency: 50 Hz/60 Hz l Frequency range: 45 Hz to 66 Hz AC input power factor ≥ 0.998 (with rated load) AC SPD Class C Maximum discharge current: Imax = 40 kA (8/20 μs) AC power distribution AC input Single, 1×63 A/3P MCB. AC auxiliary output 1×16 A/1P MCB and one 10 A three-hole socket Protection functions AC over-voltage When the input phase voltage is higher than protection the over-voltage threshold, the system takes a protection action against over-voltage. AC under-voltage When the input phase voltage is lower than the protection under-voltage threshold, the system takes a protection action against under-voltage. Input over-current The AC input circuit breaker provides the protection over-current protection function. 5-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 5 Technical Specifications Table 5-4 DC Electrical Specifications Item Description DC output features DC output voltage l Rated output voltage: -53.5 V l Range: -42 V to -58 V (The DC output voltage can be adjusted through the CSU.) DC SPD Maximum discharge current: Imax = 15 kA (8/20 μs) DC voltage drop ≤ 0.5 V inside the cabinet Regulated voltage ≤ 0.5% precision Weighted noise volt- ≤ 2 mV age Peak-peak noise volt- ≤ 200 mV (20 MHz bandwidth) age DC power distribution Battery input circuit l Two battery input branches breaker l 2×100 A MCBs DC load output circuit Twelve load output branches: breaker l LLVD1: 6×32 A +2×16 A MCBs l BLVD: 1×63 A + 1×32 A + 1×16 A + 1×10 A MCBs Protection functions Battery under-voltage LLVD1 + BLVD protection l When the battery voltage is lower than the LLVD1 threshold, the system disconnects the LLVD1 loads. l When the battery voltage is lower than the BLVD threshold, the system disconnects the batteries. DC over-voltage When the DC output voltage is higher than protection the over-voltage threshold, the system takes protective action against over-voltage. DC under-voltage When the DC output voltage is lower than the protection under-voltage threshold, the system takes protective action against under-voltage. 5-3 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Table 5-5 Supervision Interfaces Specifications Interface Description Communication interface l One RJ45 Ethernet interface, 10 M/100 M adaptive. l One RS232 communication interface. The baud rate can be set to 1200 bps, 2400 bps, 9600 bps, 19200 bps, 38400 bps, 57600 bps and 115200 bps. USB interface One USB interface on the CSU. In-relay interface Four in-relay interfaces: l In-relay 1 is used to detect the alarms of the heat exchanger. l In-relay 2, 3, 4 support customization. Out-relay interface Nine out-relay interfaces: l Six for alarm customizing. (A1 to A6) l One for the CSU fault. l One for generator control. l One for emergency lighting control. Environment detection l Four for battery temperature detection. interface l One for environment temperature detection. l One for door status detection. l One for flooding detection. Table 5-6 Structure Specifications Item Description Cabinet dimensions 1000 mm × 600 mm × 550 mm (H × W × D) Protection degree IP55 Temperature control mode 600 W heat exchanger Cabling mode Bottom cabling Installation mode Floor-mounted or pole-mounted Maintenance mode Cable connection and system maintenance in the front 5-4 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Chapter 6 Compliant Standards EMC Standards The ZXDU68 W201 system complies with the following Electromagnetic Compatibility (EMC) standards: l EN55022 l IEC61000-3-3; IEC61000-3-2; IEC61000-4-2; IEC61000-4-3; IEC61000-4-4; IEC61000-4-6; IEC61000-4-8; and IEC61000-4-11 Safety Standards The ZXDU68 W201 system is in compliance with the IEC/UL/EN 60950 safety standards. Other Standards The ZXDU68 W201 system is also in compliance with the following standards: l The Restriction of Hazardous Substances (RoHS) directive (2002/95/EC) of the European Union. l This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operations. 6-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description This page intentionally left blank. 6-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Appendix A Alarm List Table A-1 lists the alarms that can be detected by the CSU500B (SV1.12.0) supervision unit, and describes their default alarm levels and output relays. l A1 - A14 refer to 6 output relays for the alarms. l Multiple alarms can share one output relay. Each alarm cannot correspond to multiple output relays but one output relay only. "None" means that no output relay is assigned to an alarm. When an alarm is reported, it indicates that problems occur on the corresponding output relay. l The output relay of an alarm will not take effect when its alarm level is set to "Mask". Table A-1 Alarm List S.N. Alarm Name Alarm Output Alarm Description Level Relay Battery and System Alarms 1 Common Alarm Mask A1 The CSU detects that an alarm occurs. 2 Input Rly.Alm. Mask None Alarm occurs from input relay. 3 Batt.Test Fail Mask A2 Battery test fails. 4 LLVD1 Alarm Critical A2 The system disconnects the LLVD1 loads. 5 LLVD2 Alarm Critical A2 The system disconnects the LLVD2 loads. 6 Batt.Det.Abr. Critical A2 The battery voltage is lower than Test Stop Volt. in the process of the battery test. 7 BLVD Alarm Critical A2 The system disconnects the battery, and also disconnects the BLVD loads at the same time. 8 LLTD Alarm Critical A2 When the environment temperature is lower than LLTD Env.Temp., the system disconnects the LLVD1 and LLVD2 loads. 9 BLTD Alarm Critical A6 When the battery temperature is lower than BLTD Temp., the system disconnects all the battery input branches. 10 BHTD Alarm Critical A2 When the battery temperature is higher than BHTD Temp., the system disconnects the batteries. A-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description S.N. Alarm Name Alarm Output Alarm Description Level Relay 11 All Alarm Blocked Critical A2 The system does not display any other real-time alarms. This can be set through Alm.Ctrl. 12 Batt.Equal Mask A2 The system charges the batteries in boost (equalization) charge mode. 13 BMU Comm.Fail Major A2 The Battery Monitoring Unit (BMU) fails to communicate with the CSU. 15 Battery Testing Mask A2 The battery test is in process. 16 Sys.OverLoad Alm. Critical A6 The load capacity exceeds the load capability of the system. 17 Multi-SMR Alm Major None Two or more Switching Mode Rectifiers (SMRs) are faulty or fail to communicate with the CSU. 18 IOB Comm.Fail Major A2 The IO board fails to communicate with the CSU. AC Alarms 19 AC Power Off Major A3 The mains power fails and there is no standby AC input. 20 AC Volt.High Major A3 The detected AC input voltage is higher than AC Volt.H.Thre. 21 AC Volt.Low Major A3 The detected AC input voltage is lower than AC Volt.L.Thre. 22 AC Phase Lack Major A3 The AC input lacks one phase or two. 23 AC Curr.High Major A3 The AC input current is higher than AC Curr.H.Thre. 24 AC Volt.Imbala. Major A3 The difference between AC input voltages is greater than AC Volt.Imbala. 25 AC Out.SW Off Major A3 The auxiliary AC output circuit breaker trips. 26 AC In.Switch Off Major A3 The main AC input circuit breaker trips. 27 AC SPD Abr. Major A3 The AC Surge Protection Device (SPD) is damaged or not installed. 28 ACEM Comm. Brk. Major A2 The AC energy meter fails to communicate with the CSU. Rectifier Alarms 29 SMR Fan Fault Major A4 The rectifier fan is faulty. A-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Appendix A Alarm List S.N. Alarm Name Alarm Output Alarm Description Level Relay 30 SMR Ra.T.H.O. Major A4 The temperature of the PFC heat radiator is higher than the maximum radiator temperature (110 °C). 31 SMR In.V.H.O. Major A4 The AC input voltage of the rectifier is higher than the maximum input voltage. 32 SMR In.V.L.O. Major A4 The AC input voltage of the rectifier is lower than the minimum input voltage. 33 SMR Out.V.H.O. Major A4 The output voltage of the rectifier is higher than the maximum output voltage. 34 SMR Out.C.H. Major A4 The output current of the rectifier is higher than the maximum output current (68 A). 35 SMR PFC Fault Major A4 The PFC is faulty. 36 SMR Inter.T.H. Major A4 The temperature at the air inlet of the rectifier is higher than the maximum internal temperature (70 °C). 37 SMR Out.Fuse Major A4 The output fuse of the rectifier blows. 38 SMR Curr.Share Major A4 When multiple rectifiers are working in parallel, the output current difference between these rectifiers is greater than the threshold (8 A). 39 SMR Input Off Major A4 The power input of the rectifier is interrupted. 40 PFC Out.V.H. Major A4 The output voltage of PFC is higher than the threshold (450 V). 41 PFC Out.V.L. Major A4 The output voltage of PFC is lower than the threshold (345 V). 42 SMREEPROM Major A4 Errors occur when the rectifier reads and writes the EEPROM. 43 SMR In.Comm F. Major A4 The communication inside the rectifier fails. 44 SMR Primy.C.H. Major A4 The primary current of the transformer is higher than the threshold (28 A). 45 PFC Input C.H. Major A4 The PFC input current is higher than the threshold. 46 SMR Start Abr. Major A4 The starting time of the rectifier exceeds 5 minutes. 47 SMR In.Fuse Major A4 The input fuse of the rectifier blows. A-3 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description S.N. Alarm Name Alarm Output Alarm Description Level Relay 48 SMR Comm.Fail Major A4 The communication between the rectifier and the CSU is interrupted because the rectifier is removed or there is some communication exception. 49 SMR In.Freq. Major A4 The input frequency of the rectifier is too high (higher than 73 Hz) or too low (lower than 40 Hz). 50 SMR Out.V.L. Major A4 The output voltage of the rectifier is lower than the threshold (36 V). 51 SMR Out O.P. Major A4 Rectifier output overload. 52 SMR SN Clash Major A4 Rectifier SN conflict. 53 SMR Pro. Err Major A4 Wrong rectifier protocol. 54 SMR No Match Major A4 Rectifier model not matched. 55 SMR Ext. O.T. Major A4 Overheat outside the rectifier. 56 Start R.T.H. Major A4 The temperature of the soft-start current limit resistant too high. DC Alarms 57 DC Volt.High Major A5 The DC output voltage is higher than DC Volt.High Thre. 58 DC Volt.Low Major A5 The DC output voltage is lower than DC Volt.Low Thre. 59 DC SPD Abr. Major A5 The DC SPD is faulty. 60 Batt.Volt.Low Major A5 The voltage of a battery pack is lower than Batt.Volt.L.Thre. 61 Batt.Curr.Abr. Minor A5 The rate of the detected battery current to the highest detectable current is greater than Batt.Curr.Abn.Rate. 62 Batt.Temp.High Major A5 The battery temperature is higher than Batt.Temp.H.Thre. 63 Batt.Temp.Low Major A5 The battery temperature is lower than Batt.Temp.L.Thre. 64 Batt.Loop Brk. Critical A5 The battery loop is disconnected. 65 Batt.Dischg. Minor A5 The battery discharging current is higher than Batt.Dischg Thre. A-4 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Appendix A Alarm List S.N. Alarm Name Alarm Output Alarm Description Level Relay 66 Batt.T.Invalid Warning A5 The system is configured with batteries, but the battery temperature detection is ineffective. The battery temperature sensor is not installed or the battery temperature is out of the detection range. 67 LLVD1 Extend Brk. Major A5 With Load Distr.Mode set to Discon., the extended LLVD1 circuit breaker trips or the extended LLVD1 fuse blows. 68 LLVD1 Loop Brk. Major A5 With Load Distr.Mode set to Discon., the LLVD1 circuit breaker trips or the LLVD1 fuse blows. 69 LLVD2 Extend Brk. Major A5 With Load Distr.Mode set to Discon., the extended LLVD2 circuit breaker trips or the extended LLVD2 fuse blows. 70 BLVD Extend Brk. Major A5 With Load Distr.Mode set to Discon., the extended BLVD circuit breaker trips or the extended BLVD fuse blows. 71 BLVD Loop Brk. Major A5 With Load Distr.Mode set to Discon., the BLVD circuit breaker trips or the BLVD fuse blows. 72 Cell Reverse Major No One or more 2 V batteries are reversely connected. 73 Block Reverse Major No One or more 12 V batteries are reversely connected. 74 Cell Poor Major No The voltage of one or more 2 V batteries is lower than Cell Volt.Diff. 75 Block Poor Major No The voltage of one or more 12 V batteries is lower than Block Volt.Diff. 76 DC.Loop.Brk. Critical No With Load Distr.Mode set to No Discon., the DC output circuit breaker trips or the DC output fuse blows. 77 Load Ext.Brk. Major A5 With Load Distr.Mode set to No Discon., the extended DC output circuit breaker trips or the extended DC output fuse blows. Environment Alarms 78 Env.Temp.High Minor A6 The environment temperature is higher than Env.Temp.H.Thre. A-5 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description S.N. Alarm Name Alarm Output Alarm Description Level Relay 79 Env.Temp.Low Minor A6 The environment temperature is lower than Env.Temp.L.Thre. 80 Env.Hum.High Minor A6 The environment humidity is higher than Env.Hum.H.Thre. 81 Env.Hum.Low Minor A6 The environment humidity is lower than Env.Hum.L.Thre. 82 Door Alarm Minor A6 The door with the door status switch is opened. 83 Access Ctrl.Alm. Mask A6 The sensor detects the intrusion of something. 84 Smog Alarm Major A6 The sensor detects smog. 85 Flood Alarm Major A6 The sensor detects flood. 86 Glass Brk.Alm. Minor A6 The sensor detects broken glasses. 87 Env.Temp.Invalid Mask A6 The environment temperature sensor is damaged or not installed. 88 Env.Hum.Invalid Mask A6 The environment humidity sensor is damaged or not installed. A-6 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Appendix B Electrical Connection Diagram For the operating principle diagram of the ZXDU68 W201 system, see Figure B-1. Figure B-1 Operating Principle Diagram of the ZXDU68 W201 The system components are described as follows. l AC distribution unit: Connects AC input to the system and distributes AC power. l Rectifiers: Convert AC to DC. l DC distribution unit: Provides DC output to the loads and connects the batteries to the system. l CSU: Controls and manages the system. l Batteries: Provide standby DC power to the loads when the mains is failure. For the detailed electrical connection diagrams of the ZXDU68 W201 system, see Figure B-2. B-1 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description Figure B-2 Electrical Connection Diagram of the ZXDU68 W201 B-2 SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential Glossary AC - Alternating Current BHTD - Battery High Temperature Disconnect BLTD - Battery Low Temperature Disconnect BLVD - Battery Low Voltage Disconnect BMU - Battery Monitoring Unit CAN - Controller Area Network CSU - Centralized Supervision Unit DC - Direct Current EEPROM - Electrically Erasable Programmable Read-Only Memory EMC - Electromagnetic Compatibility EMI - Electromagnetic Interference FTP - File Transfer Protocol GND - Ground GPRS - General Packet Radio Service HTTP - Hypertext Transfer Protocol IE - Internet Explorer LCD - Liquid Crystal Display I SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential ZXDU68 W201 Product Description LLTD - Load Low Temperature Disconnect LLVD - Load Low Voltage Disconnect MCB - Miniature Circuit Breaker MTBF - Mean Time Between Failures PE - Protective Earth PFC - Power Factor Correction RoHS - Restriction of Hazardous Substances SC - Supervision Center SIU - Signal Interface Unit SMR - Switching Mode Rectifier SNMP - Simple Network Management Protocol SPD - Surge Protection Device USB - Universal Serial Bus II SJ-20150930111933-001|2015-09-10 (R1.0) ZTE Proprietary and Confidential