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).
The GoWatron GWPR300-VTP Busbar VT Paralleling Relay integrates voltage monitoring, abnormal voltage alarms and VT secondary voltage circuit paralleling and de-paralleling. It continuously monitors the voltages of two busbar sections and automatically establishes the secondary paralleling connections when the primary busbar paralleling status, paralleling permissive signal and relevant voltage criteria are satisfied. It also provides overvoltage, undervoltage and residual overvoltage alarms.
Communication:
• Two Ethernet ports supporting IEC 60870-5-104;
• Two optional Ethernet ports supporting IEC 61850;
• One RS-485 communication port supporting Modbus RTU.
The GoWatron GWPR320-BCU Bay Control Unit is a digital measurement and control device integrating electrical measurement, binary status acquisition, remote control, synchronism supervision, controlled closing and communications. It is designed for bay measurement and control and common signal monitoring in substations, distribution substations and industrial power distribution systems. Available in A, B and C configurations, the unit offers different combinations of voltage inputs, current inputs and synchronising channels. Two Ethernet ports and two RS-485 ports support integration with substation control or SCADA systems via IEC 60870-5-103 over Ethernet and Modbus RTU, with IEC 61850 available as an option.
GWPR-SRI Reactor Integrated Differential Protection Relay (Brand: GoWatron) is suitable for reactor protection and measurement & control at voltage levels of 132 kV, 66 kV, 33 kV, and 11 kV. It uses a 32-bit high-performance microcontroller integrating DSP and FPU, providing comprehensive protection, measurement, control, communication, and time synchronisation functions. The GWPR-SRI Reactor Integrated Differential Protection Relay features flexible hardware configuration and high immunity to electromagnetic interference, meeting the diverse requirements of power systems for reactor protection.
The GWPR300-VTS Busbar VT/PT Supervision Relay is designed for busbar voltage transformer (VT) protection, monitoring, and control in 132 kV, 66 kV, and 33 kV systems. It combines overvoltage, undervoltage, residual overvoltage, and VT secondary circuit failure alarms with voltage and frequency measurement and communication functions. It is suitable for installation in busbar VT panels and integration into substation automation systems.
Communication
GWPR320-PQA Power Quality Analyser is an online power quality monitoring device based on a 32-bit ARM Cortex-M4 core. It is designed for high-accuracy power quality measurement in photovoltaic grid-connected systems, renewable energy plants, distributed generation systems, substations, and distribution networks. The device integrates high-precision data acquisition, real-time analysis, event recording, alarming, and waveform capture, supporting voltage deviation, frequency deviation, voltage and current unbalance, harmonics, interharmonics, voltage fluctuation and flicker, voltage events, and DC component monitoring.
The GWPR300-FV Voltage & Frequency Control Relay is designed for emergency control under abnormal grid frequency and voltage conditions. It provides three-stage underfrequency/overfrequency/undervoltage/overvoltage load-shedding tripping, and can also operate as a terminal execution device to execute remote trip commands or load-shedding commands issued by a regional stability control system.
Communication
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.
