GWPR300‑C Capacitor bank Protection Relay
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.
Product Introduction
The GWPR300‑C is a digital protection relay designed for medium‑voltage shunt capacitor banks. It integrates comprehensive current, voltage, zero‑sequence, negative‑sequence and non‑electrical protection functions, featuring configurable alarm/trip logic for overcurrent, overvoltage, undervoltage, unbalance and earth‑fault conditions. Supporting ANSI device numbers, it provides fault recording, event logging and standard communication interfaces. The relay accommodates multiple capacitor‑bank connection configurations, delivering comprehensive, fast and reliable protection for reactive‑power compensation capacitor banks in substations and industrial distribution networks.
Protection Functions
- (ANSI 50) Overcurrent Protection Stage 1 (Trip)
- (ANSI 50) Overcurrent Protection Stage 2 (Trip)
- (ANSI 51) Overcurrent Protection Stage 3 (Trip)
- (ANSI 51) Inverse‑Time Overcurrent Protection (Trip; Normal / Very Inverse / Extremely Inverse selectable)
- (ANSI 46N) Neutral Unbalance Current Protection (Alarm / Trip selectable)
- (ANSI 50N) Zero‑Sequence Overcurrent Protection Stage 1 (Trip)
- (ANSI 50N) Zero‑Sequence Overcurrent Protection Stage 2 (Trip)
- (ANSI 51N) Zero‑Sequence Overcurrent Protection Stage 3 (Alarm / Trip selectable)
- (ANSI 59) Overvoltage Protection (Trip)
- (ANSI 27) Undervoltage Protection (Alarm / Trip selectable)
- (ANSI 47N) Neutral Unbalance Voltage Protection (Alarm / Trip selectable)
- Voltage Transformer (VT) Circuit Failure (Alarm)
- Control Circuit Supervision (Alarm)
- (ANSI 63) Non‑Electrical Protection 1 / 2 (Alarm / Trip selectable)
Typical Applications
- Utility Substations – For shunt reactive‑power compensation capacitor banks in 6–132 kV utility substations, delivering comprehensive fault protection for grid‑side capacitor installations.
- Industrial Facilities – Applied to 6–132 kV power‑factor correction capacitor banks in metallurgy, mining and chemical plants to handle impact loads and harmonic conditions.
- Renewable Power Stations – Suitable for 6–132 kV reactive‑power compensation capacitor banks in solar and wind farms to satisfy on‑site supervision and grid‑code compliance requirements.
- Critical Infrastructure – Deployed for capacitor assemblies within 6–132 kV power houses of data centres and rail transit, supporting unattended operation.
- Overseas Projects – Designed for new‑build and retrofit 6–132 kV overseas distribution projects, compatible with ANSI standards and various system earthing schemes.
