Various Types of Numerical Protection Relays

One-Stop OEM/ODM Services for Numerical Protection Relays

Numerical Overcurrent Protection Relays (≤ 230 kV).

Numerical Over & Under Voltage Protection Relays (≤ 230 kV).

Numerical Over & Under Frequency Protection Relays (≤ 230 kV).

Numerical Non-Electric Quantity Protection Relays (≤ 230 kV).

Full Range of Secondary Digital Intelligent Terminals (≤ 230 kV).

Numerical Protection Relays & Secondary Digital Intelligent Terminals for Systems Rated Up to 230 kV

Power Protection Relays

Products Related To Other Protection Relays

GWPR200-RP Reverse Power Protection Relay

ANSI

Desc

The GoWatron GWPR200-RP Reverse Power Protection Relay is primarily designed for grid-connected photovoltaic systems. It provides protection tripping in response to reverse power and automatic closing when forward power is restored. The relay supports four reverse-power trip outputs and four closing-command outputs. It supports both local installation in switchgear and centralised installation in a protection panel. Integrating protection, measurement, control, communication and event recording functions with comprehensive self-supervision, the GWPR200-RP is a dedicated protection relay for distributed PV grid-connection applications.

The relay is equipped as standard with an RS-485 interface supporting Modbus RTU.
Optional dual Ethernet ports support IEC 60870-5-103 over Ethernet.
Supported time-synchronisation methods include message-based time synchronisation, SNTP network time synchronisation and IRIG-B.

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GWPR100-I Digital Integrated Protection Relay

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.

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GWPR350-HSBT High-Speed Busbar Transfer Device

Desc

The GWPR350‑HSBT High‑Speed Busbar Transfer Device is compatible with 3‑132 kV medium‑ and high‑voltage dual‑power systems; standard 100 V PT secondary input, 5 A / 1 A CT secondary input; supports DC110 V / DC220 V operating power supply.
Primary single‑line configuration: Suitable for single‑busbar and single‑busbar‑sectionalised topologies. Fully supports mutual transfer between incoming feeders and bidirectional transfer logic between incoming feeder and bus‑section breaker.
Applicable loads: Developed for continuous‑process busbars with large‑capacity asynchronous motors. GWPR350‑HSBT replaces conventional time‑delayed automatic bus transfer equipment and mitigates motor shutdown and process interruption caused by grid voltage sags.
Environmental & communication specifications: Operating temperature: -25 ℃ ~ 60 ℃. Standard interfaces include RS485 and Ethernet. Supported protocols: IEC 60870‑5‑103, Modbus; IEC 61850 digital protocol is optional. It supports IRIG‑B code and pulse‑per‑second hardware time‑synchronisation, with station‑wide synchronisation error ≤ 1 ms.

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