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GWZC-9828 Transformer Non-Electrical Protection Relay
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GWZC-9828 Transformer Non-Electrical Protection Relay

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

GWZC-9827 Transformer Backup Protection Relay
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GWZC-9827 Transformer Backup Protection Relay

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

GWZC-9826 Main Transformer Differential Protection Relay
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GWZC-9826 Main Transformer Differential Protection Relay(87H | 87 | 87A)

Product Overview: GWZC-9826​ is a fast-acting (<30ms) ​transformer differential relay​ for ​33kV–110kV systems, featuring harmonic restraint. Used in substations and industrial plants for transformer protection.

Product functions(ANSI):87H | 87 | 87A | 60

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

GWZC-9833 Motor Magnetic Balance Differential Protection Relay
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GWZC-9833 Motor Magnetic Balance Differential Protection Relay (87M)

Product Overview : GWZC-9833​ provides magnetic balance differential protection for HV motors, with overcurrent and thermal protection. Installed in motor control centers, it safeguards critical industrial motors with fault recording capability.

Product functions(ANSI):87M | 50 | 51 | 51 | 51 | 49 | 48 | 50Q | 46 | 46 | 50N/51N | 49 | 48 | 86 | 59 | 27 | 59N | 81O | 81U | 60FL | 27 | 74 | 27/81U | 30

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

GWZC-9862 Incoming Line Auto-transfer Relay
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GWZC-9862 Incoming Line Auto-transfer Relay (50/27)

Product Overview : The ​GWZC-9862 Auto-Transfer Relay​ ensures ​uninterrupted power supply​ by automatically switching to backup sources in ​35kV substations and industrial plants. It features ​voltage/current monitoring, programmable delays, and fault logging, with ​IEC 61850/Modbus support.

Product functions(ANSI):50/27 | 50/51 | 51 | 49 | 74

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

GWZC-9852 PT synchronizing relay
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GWZC-9852 PT Paralleling relay

Product Overview: GWZC-9852 PT Paralleling Relay​ ensures safe synchronization in 33kV/66kV systems through phase, frequency and voltage matching. Prevents out-of-phase closing with adjustable thresholds. Installed in switchgear and generator panels.

Product functions(ANSI):59 | 59N | 27/59

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

GWZC-9842 Capacitor switching relay
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GWZC-9842 Capacitor switching relay

Product Overview: The GWZC-9842 capacitor switching relay provides protection, control and monitoring for capacitor banks in 110kV and below systems, with installation in substations and industrial plants.

Product functions(ANSI):87H | 87 | 50/51 | 51 | 46 | 50N/51N | 59 | 27 | 47 | 74 | 74T | 30 | 25

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

GWZC-9832 Motor Differential Protection Relay GWZC-983
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GWZC-9832 Motor Differential Protection Relay (87M)

Product Overview : GWZC-9832 Motor Differential Protection Relay for HV/LV motors (11kV-400V), detecting internal faults with CT supervision. Installed in MCCs and switchgear for fast fault clearance in industrial/power applications.

Product functions(ANSI):87H | 87 | 50 | 51 | 51 | 51V | 49 | 48 | 46 | 46 | 46V | 50N/51N | 49 | 48 | 86 | 59 | 27 | 59N | 81O | 81U | 60FL | 60 | 74 | 27/81U | 30

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

GWZC-9821C Transformer Differential Protection Relay
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GWZC-9821C Transformer Differential Protection Relay (87T)

Product Overview: The ​GWZC-9821C​ is a transformer differential relay that detects internal faults while preventing inrush false trips. Installed in substation panels, it provides reliable protection for power transformers in utility/industrial systems.

Product functions(ANSI):87T | 87 | 87AL | 50/51 | 51V | 49 | 46 | 46 | 50N/51N | 51N | 59 | 27 | 59N | 60FL | 60 | 60CT | 74 | 27D | 30

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

GWZC-9890L Low-Frequency Low-Voltage Load Shedding DeviceGWZC-9890L Low-Frequency Low-Voltage Load Shedding Device
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GWZC-9890L Low-Frequency Low-Voltage Load Shedding Device

Product Overview : GWZC-9890L Underfrequency/Undervoltage Load Shedding (UFUVLS) device is a grid protection system that automatically cuts loads to maintain stability during frequency drops or voltage dips, preventing blackouts in renewable-rich power networks.

Product functions(ANSI):27L1, 27L2, 27L3 | 59L1, 59L2, 59L3 | 81L1, 81L2, 81L3 | ​81O1, 81O2, 81O3

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

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