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RTU Communication Panel
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GWZC-9000 Remote Terminal Unit (RTU) Communication Panel

Application:Used in PV plants, substations, power plants, and power automation systems for protocol conversion, data acquisition, and transmission.
Protocol Conversion: Supports mutual conversion and uplink of Modbus, IEC 103/104, IEC 61850, and TCP/IP.
Data Handling: Acquires data from protection relays/power meters, converts it to SCADA/dispatch-compliant protocols, and transmits to master stations/dispatch systems.

Main Transformer Protection Panel
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GWZC-9000 Main Transformer Protection Panel

Application Scope : The GWZC-9000 main transformer protection control panel is designed for the protection and control of medium to large capacity main transformers with voltage levels of 11kV, 33kV, 69kV, 115kV,132.

Product functions(ANSI):87H | 87 | 87A | 60 | 50/51 | 51 | 50N/51N | 51N | 49 | 50G/51G | 38/74 | 59 | 59N | 27 | 74 | 60 | 27/81U | 27/81L | 30 | 71G | 26/49 | 63 | 38

Generator Protection Panel
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GWZC-9000 Generator protection panel​

Product Overview : The ​GWZC-9000 generator protection panel is mainly used for the control and protection of hydroelectric units, gas turbine units, biogas units, and large diesel generator sets.

Product functions(ANSI):87H | 87 | 87A | 49 | 50/51 | 51 | 49 | 46 | 50N/51N | 40 | 32 | 81O/81U | 59/27 | 59N | 64S | 60 | 27 | 27/81U | 74 | 50N/51N | 50G/51G

Product Components : GWZC-9884 Generator Differential Protection Relay | GWZC-9885 Generator Rotor Earth Fault Protection Relay | GWZC-9886 Generator Backup Protection Relay | Panel and accessories

GWZC-9801 Public Measurement and Control Device
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GWZC-9801 Public Measurement and Control Device

Product Overview : The ​GWZC-9801​ is a ​35kV/substation​ protection and control relay with ​measurement, switching, communication (IEC 61850/Modbus), and fault logging, used in ​switchgear and industrial power systems.

Product functions(ANSI):25 | 51N | 59N

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

GWZC-9790N Reverse Power Protection Relay
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GWZC-9790N Reverse Power Protection Relay (ANSI 32)

Product Overview : The ​GWZC-9790N​ reverse power relay detects and blocks reverse power flow in 6.6kV-33kV systems, with adjustable trip settings for generator and grid protection in switchgear applications.

Product functions(ANSI):50 | 51 | 49 | 50N/51N | 32 | 32R | 79 | 59 | 27 | 59N | 74

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

GWZC-9890J Fault Islanding Protection Device
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GWZC-9890J Fault Islanding Protection Device

Product Overview : GWZC-9890J​ is a fault disconnection relay for ​10-35kV grids, detecting and isolating faults (overcurrent, undervoltage, frequency issues) to prevent system failures.

Product functions(ANSI):59N | 27 | 59 | 81U | 81O | 78 | 60 | 94

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

GWZC-9886 Generator Backup Protection Relay
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GWZC-9886 Generator Backup Protection Relay

Product Overview : The ​GWZC-9886​ is a generator backup relay for 10kV–35kV systems, offering overcurrent, under/overvoltage, and reverse power protection. Installed in generator panels, it ensures fault backup security.

Product functions(ANSI):50/51 | 51 | 49 | 46 | 50N/51N | 40 | 32 | 81O/81U | 59/27 | 59N | 64S | 60 | 27 | 27/81U | 74

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

GWZC-9885 Generator Rotor Earth Fault Protection Relay
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GWZC-9885 Generator Rotor Earth Fault Protection Relay

Product Overview : GWZC-9885 Rotor Earth Fault Relay​ – Provides two-stage protection (alarm/trip) with insulation monitoring for generator rotors, preventing winding damage. Installed in protection/excitation panels.

Product functions(ANSI):50N/51N | 50G/51G

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

GWZC-9884 Generator Differential Protection Relay
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GWZC-9884 Generator Differential Protection Relay(87G)

Product Overview : The ​GWZC-9884​ is a generator differential relay offering fast fault protection with harmonic restraint, ideal for power plants and industrial generators (6.6kV–24kV).

Product functions(ANSI):87H | 87 | 87A | 49

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

GWZC-9829 Main Transformer On-load Tap Changer Control Relay
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GWZC-9829 Main Transformer On-load Tap Changer Control Relay

Product Overview : The GWZC-9829 relay provides on-load tap changer control for 66kV/110kVpower transformers, enabling tap position monitoring and voltage regulation.

Product functions(ANSI):94 | 90

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

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