


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
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
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
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
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
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
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
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
Product Overview : Transformer Non-Electrical Protection Relay monitors oil temperature, gas, and pressure in transformers (35kV+). Installed on transformers or in control cabinets, it provides alarms/trips to prevent failures. Essential for substations and power plants, it complements electrical protection systems.
Product functions(ANSI):71G | 26/49 | 63 | 38
Communication functions : IEC61850 | IEC 60870-5-103 | MODBUS RTU |2× Ethernet Ports |2× RS-485
Product Overview : GWZC-9827 is a transformer backup protection relay for 66kV/33kV/11kV systems, providing overcurrent, earth fault and overload protection. Installed in switchgear, it offers secondary protection with IEC 61850/Modbus support.
Product functions(ANSI):50/51 | 51 | 50N/51N | 51N | 49 | 50G/51G | 38/74 | 59 | 59N | 27 | 74 | 60 | 27/81U | 27/81L | 30
Communication functions : IEC61850 | IEC 60870-5-103 | MODBUS RTU |2× Ethernet Ports |2× RS-485