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Power system stability control device related product

GWZC-9890D Anti-islanding protection relay
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GWZC-9890D Anti-islanding protection relay(AIP)

Product Overview : GWZC-9890D Anti-islanding Protection Relay is designed for distributed generation systems, providing comprehensive protection, measurement, and control functions at grid interconnection points. It effectively prevents islanding conditions and ensures safe operation of distributed power sources.

Product functions(ANSI):81O| 81U| 59| 27| 81R | 32 | 94 | 67 | 50N/51N | 59N | 79 | 60FL | 50H/51H

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-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

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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