Product

The GWZC-9000 integrated automation system for photovoltaic power plants incorporates advanced control, monitoring, and protection technologies to enhance operational efficiency, reliability, and safety. The system automates critical functions such as circuit breaker operation, load switching, fault detection, and isolation, reducing manual intervention and minimizing downtime. It utilizes intelligent protection relays, programmable logic controllers (PLCs), and remote terminal units (RTUs) to collect real-time data on voltage, current, power quality, and equipment status.

The GWZC-9000 hydropower plant  automation system incorporates advanced control, monitoring, and protection technologies to enhance operational efficiency, reliability, and safety. It automates critical functions such as generator control, load distribution, fault detection, and isolation, minimizing manual intervention and reducing downtime. The system utilizes intelligent protection relays, programmable logic controllers (PLCs), and remote terminal units (RTUs) to collect real-time data on voltage, current, power quality, and equipment status.

Product Overview: GWZC-9887 Generator-Transformer Differential Protection Relay provides complete differential protection for generator-transformer units. Features percentage differential protection, harmonic restraint, and IEC61850 communication support. Installs in switchgear panels for medium-small generator-transformer protection.

Product functions（ANSI）：87H | 87 | 87A | 87B | 71M | 71T | 38 | 49 | 71O | 63PR | 27/81U | 40

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

The GWZC-9000 ​20kV & 33kV Substation Automation System (SAS)​​ integrates ​intelligent protection relays, PLCs, and RTUs​ to automate critical functions such as ​circuit breaker control, fault detection, load management, and power quality monitoring. This system ensures ​real-time data acquisition, remote operation, and rapid fault isolation, minimizing downtime and improving grid resilience.

The GWZC-9000 6kV & 11kV switching station automation system integrates advanced control, monitoring, and protection technologies to enhance the efficiency, reliability, and safety of medium-voltage power distribution. This system automates key functions such as circuit breaker operation, load switching, fault detection, and isolation, reducing manual intervention and minimizing downtime. It employs intelligent electronic devices (IEDs), programmable logic controllers (PLCs), and remote terminal units (RTUs) to collect real-time data on voltage, current, power quality, and equipment status.

Introduction : The Fault Recorder Panel (FRP) serves as the “black box” of power systems, capturing real-time voltage/current waveforms and digital signals during faults to provide critical data for fault analysis and protection verification. ​(ANSI 21)

Communication protocols : ​IEC 60870-5-101/103/104 ,IEC 61850（MMS/GOOSE/SV）, Modbus RTU​ & ​Modbus TCP​,RJ-45 , RS-485

Product Overview : The ​GWZC-9812 Distance Protection Relay​ provides directional line protection (distance, current, voltage) and three-phase auto-reclosing for distribution systems below 35kV.

Product functions（ANSI）：21 | 21G | 21FL | 68 | 50/51 | 50N/51N | 32 | 27 | 79 | 50HS/79 | 49 | 81U | 60FL

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

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

Product Overview : The GWZC-9651 VT Protection Relay​ protects VTs (11kV-400kV) by detecting voltage faults. Used in substations to ensure accurate protection measurements.

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

Communication functions : IEC61850（Optional） | ​​IEC 60870-5-103 | MODBUS RTU | 1× Ethernet Ports | 1× RS-485

Product Overview : The ​GWZC-9661 Automatic Transfer Switch (ATS)​​ automatically switches power sources to ensure uninterrupted supply, with voltage/frequency monitoring and fault protection for critical facilities. Complies with IEC/IEEE standards.

Product functions（ANSI）:50/27| 50/51| 79| 60| 74

Communication functions : IEC61850（Optional） | ​​IEC 60870-5-103 | MODBUS RTU | 1× Ethernet Ports | 1× RS-485