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GWZC-9861 Bus-Tie Automatic Transfer Protection Relay
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GWZC-9861 Bus-Tie Automatic Transfer Protection Relay

Product Overview:GWZC-9861 Bus-Tie Automatic Transfer Protection Relay is suitable for automatic transfer of incoming line switches, inner bridge switches, and main transformer switches at voltage levels below 110kV. It can be installed in panel assemblies or locally within switchgear cabinets.

Product functions(ANSI):50/51 | 51VI | 49 | 74
Communication functions: IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

GWZC-9851 PT protection relay
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GWZC-9851 PT protection relay

Product Overview : The ​GWZC-9851 PT Protection Relay​ provides ​overvoltage and undervoltage protection​ for ​110kV and below​ busbar PTs, typically installed in ​switchgear cabinets​ for voltage monitoring.
Product functions(ANSI): 59 | 27 | 59N | IEC 61850: XCBR.AlmCCS/MMXU.AlmPTFF
Communication functions: IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

GWZC-9811  Line protection relay
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GWZC-9811 Line protection relay

Product Overview : GWZC-9811 Line Protection Relay is designed for the protection of 33kV & 66kV transmission lines and feeder circuits, featuring easy installation and simple commissioning.
Product functions(ANSI):51P/27 | 51I | 51N | 49 | 46 | 59/27/59N
Communication functions: IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

GWZW-9883  Generator Comprehensive Protection Relay
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GWZW-9883 Generator Comprehensive Protection Relay

 Product Overview:The VIP-96S88C is a generator comprehensive protection relay that integrates differential protection and backup protection.

Product functions(ANSl):87G;60FL;50;50N;51;51N;51AC;40;49;46;46IT;58/59N;60FL;74;81L/81R

Communication functions:Ethernet 103, MODBUS RTU, 2×ETH, 2×RS485

GWZC-9841 Capacitor protection relay
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GWZC-9841 Capacitor protection relay

Product Overview:The Capacitor Protection Relay​ is designed for ​low-voltage (LV) and medium-voltage (MV) capacitor bank protection​ and is typically installed in ​switchgear cabinets​ within substations, industrial plants, and power distribution systems.

Product functions(ANSI)51P | 67P | 51PI | 51N | 67N | 59 | 27 | 47 | 74 | 63 | 49 | 38

Communication functions: IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

GWZC-9831 Motor protection relay
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GWZC-9831 Motor protection relay

Product Overview : GWZC-9831 Motor Protection Relay Designed specifically for 0.4kV and 10kV motor protection applications, this relay enhances motor reliability, safety, and automation levels in industrial and power distribution systems.
Product functions(ANSI):50/51 | 49 | 48 | 46 (Stage I) | 51N/50N | 48LR | 66 | 59 | 27 | 59N | 81O | 81U | 60FL | 27X | 74 | 50BF | 38 | 49T
Communication functions : IEC61850 | ​​IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

GWZC-9821 Transformer protection relay
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GWZC-9821 Transformer protection relay

Product Overview : GWZC-9821 Transformer Protection Relay Specifically designed for power transformers, this device is installed in switchgear cabinets of substations and industrial power distribution systems to ensure safe and reliable operation of transformers.
Product functions(ANSI):51P/27 | 51I | 51N | 49 | 46 | 59/27/59N
Communication functions :​​ IEC61850 | IEC 60870-5-103 | MODBUS RTU | 2× Ethernet Ports | 2× RS-485

Technical Knowledge More
Wireless Temperature Monitoring System for Substations
Wireless Temperature Monitoring System: Application in Switchgear​
This article introduces the application of wireless temperature monitoring systems in high-voltage and low-voltage switchgear. The configuration of the wireless temperature monitoring system varies across different equipment. If you need a customized wireless temperature monitoring solution for your project, please visit our website for more information.
2025/09/08
GWZC-9804 Arc Flash Protection Relay
Switchgear Arc Flash Protection System Configuration Scheme
This article introduces the configuration scheme for a switchgear arc flash protection system. Busbar arc flash protection monitors the busbar compartment and trips the incoming breaker, while feeder arc flash protection monitors the circuit breaker compartment and cable compartment to trip the feeder breaker. A proper arc flash protection system configuration scheme can effectively protect personnel and equipment safety. For information on a reliable arc flash protection system configuration scheme, please visit our website.
2025/09/04
Arc Flash Protection Relay
Arc Protection Working Principle and Decision Process
Arc Flash Protection is a specialized safety system engineered to rapidly detect and mitigate destructive electrical arc flash faults. Unlike conventional overcurrent protection, it utilizes a combination of light and current sensors to identify an arc flash event within milliseconds. By triggering a circuit breaker to isolate the fault incredibly fast, Arc Flash Protection significantly reduces the explosive energy released, safeguarding personnel from severe injury and preventing extensive damage to electrical equipment like switchgear. This makes it an indispensable defense layer in industrial, commercial, and utility power systems.
2025/09/03
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