Digital Intelligent Capacitor Protection Relays

The GWPR200‑C Capacitor Protection Relay is an integrated protection, measurement and control device developed by GoWatron, specifically designed for shunt capacitor banks in 11 kV, 33 kV ungrounded and low‑resistance earthed power systems. The device integrates protection, measurement, control, communication and event recording functions into a single compact unit. It supports both rack‑mounted installation in central panels and direct local installation in switchgears. With high hardware integration, a user‑friendly human‑machine interface and reliable operational performance, it fully meets the requirements for comprehensive capacitor protection and automation integration in domestic and international power distribution systems.

• Equipped with 2 Ethernet ports (optional, supporting IEC 61850‑103 protocol);
  
• 1 RS485 interface (Modbus‑RTU);
  
• Supports multiple time‑synchronization modes: IRIG‑B, SNTP and communication message time synchronization.

• The GWPR100-I digital integrated protection relay is independently developed by GoWatron. It adopts a 32-bit embedded microprocessor architecture that integrates protection, measurement, control and communication functions into one single unit. The device is especially suitable for protection applications in ring main units and package substations. It applies to medium and low voltage distribution systems with rated voltages up to 11 kV and 13.8 kV, covering feeders, distribution transformers, shunt capacitor banks, bus tie breakers and asynchronous motors.
• This relay complies with IEC and GB EMC standards. It supports cyclic storage of 128 fault event logs and 8 groups of non-volatile setting groups, and is equipped with a Chinese LCD human-machine interface. Two installation modes are available: decentralized mounting on local switchgear panels and centralized rack mounting in control rooms, making it suitable for complex operating conditions of industrial plants, photovoltaic power stations and substations.

The GWPR300‑C Capacitor bank Protection Relay is designed for the protection, measurement, and control of shunt capacitors in unearthed or low‑resistance‑grounded neutral systems with rated voltages below 132 kV.
As an integrated protection‑measurement‑control device, it features communication interfaces that enable seamless integration into automation systems together with other protection and control equipment. The relay is suitable for both panel‑mounting in protection cabinets and local installation on switchgear.

• Communication – 2 Ethernet ports (IEC 104), 2 Ethernet ports (IEC 61850, optional), 1 RS485 port (Modbus-RTU).
• Time Synchronization – Supports message-based sync, SNTP, and IRIG-B.
• Printing – Supports serial dot-matrix printers for settings, event records, and fault waveforms.