GoWatron -One-Stop Power & Energy Solutions

• The GoWatron GWPS-110V/220V-200Ah is an integrated station DC power supply system designed for substations, power plants, renewable energy facilities and industrial power distribution projects. Its typical rated DC voltage is 110 V DC or 220 V DC, with a 200 Ah battery bank.
• The system provides a stable and reliable DC supply for protection relays, bay control units, circuit-breaker trip and close circuits, signalling systems, communication equipment and emergency lighting.
• Under normal operating conditions, the high-frequency switch-mode charger modules supply the connected DC loads while charging the battery bank. If the AC auxiliary supply fails, the battery bank immediately supplies the essential DC loads, ensuring the uninterrupted operation of protection, control, signalling, communication and circuit-breaker operating circuits.
• The system provides intelligent monitoring, automatic battery charging, DC insulation monitoring, fault alarms and remote communication. In addition to 110 V DC and 220 V DC, GoWatron can provide systems rated at 24 V DC, 48 V DC and 125 V DC, as well as other customised voltage levels.
• The battery capacity, charger module ratings, outgoing feeder configuration, DC busbar arrangement and panel construction can all be customised to meet specific project requirements.

• The GWPR300-TNE Transformer Non-Electrical Quantity Protection Relay is designed for transformers rated up to and including 132 kV. Built on a high-performance 32-bit microcontroller platform with an integrated DSP and FPU, the relay provides protection processing, output logic, event recording, disturbance recording, and communication with substation supervisory systems. It continuously acquires and evaluates non-electrical quantity signals from the transformer main tank and on-load tap changer and initiates the corresponding trip or alarm outputs.
• The relay is primarily intended for transformer non-electrical quantity protection applications. It can receive signals associated with Buchholz alarm, Buchholz trip, temperature, cooling-system failure, pressure-relief device operation, oil level, and other non-electrical conditions. Trip or alarm outputs are initiated according to the configured logic and time-delay settings to help ensure safe and stable transformer operation.
• The relay supports two Ethernet ports using IEC 60870-5-104, two optional Ethernet ports using IEC 61850, and one RS-485 communication port using Modbus RTU. Supported time-synchronization methods include communication-message synchronization, SNTP, and IRIG-B. The relay also supports a serial dot-matrix printer for printing setting values and event records.

• The GoWatron GCS Low-Voltage Withdrawable Switchgear is a modular low-voltage switchgear and controlgear assembly designed for power distribution systems in power plants, oil and gas facilities, petrochemical plants, metallurgical facilities, textile mills, industrial plants, high-rise buildings and infrastructure projects.
• It is suitable for three-phase AC systems operating at 50/60 Hz, with a rated operational voltage of up to 690 V and main busbars rated up to 4,000 A. The switchgear can be used for receiving, converting, distributing and controlling electrical power, as well as for centralised motor control and reactive power compensation.
• For highly automated applications, the switchgear can be equipped with auxiliary contacts, measuring devices, communication interfaces and intelligent monitoring units according to project requirements. This configuration enables integration with power monitoring and automation systems.
• The GCS switchgear features a compartmentalised arrangement and withdrawable functional units. Its modular construction combines a compact footprint and flexible circuit configuration with ease of operation and straightforward maintenance. Each assembly can be customised according to the project single-line diagram, load characteristics and installation conditions.

• The GWPC-EXC Generator Excitation Control Panel is an essential control component of excitation systems for synchronous generators with ratings up to 300 MW. It continuously measures generator-terminal voltage, stator current, frequency, reactive power, power factor, and other operating quantities, and regulates the DC output of the thyristor rectifier accordingly. The controlled excitation output maintains the generator-terminal voltage at the required level and enables the generating unit to meet its reactive power control requirements during grid-connected operation.
• The GWPC-EXC provides automatic voltage regulation, manual field current control, operating limiters, logic control, fault monitoring, HMI, and communication functions. Depending on the generator rating, excitation method, and project requirements, the power rectifier, field-flashing unit, de-excitation unit, and excitation transformer may be supplied as integrated assemblies or as separate panels and equipment.
• The panel is widely used in hydropower plants, thermal power plants, industrial captive power plants, biomass power plants, waste-heat power generation facilities, and other facilities that operate synchronous generators. It plays an important role in ensuring the safe, stable, and efficient operation of the generator.

• The GWPR-AF-S series comprises fiber-optic arc-flash sensors for detecting internal arc faults in switchgear. The sensors are designed for use with the GWPR220-AF Feeder Arc-Flash Protection Relay and the GWPR350-AF Busbar Arc-Flash Protection Relay.
• When an internal arc fault occurs, the sensors detect the resulting optical radiation and transmit an optical signal to the connected protection relay through an optical-fiber link. The relay evaluates the optical signal together with the configured electrical permissive criteria and operating logic, then initiates an alarm or trip output as required.
• The series provides different spectral responses, self-test functions, fields of view, sensing methods and mounting arrangements. Available configurations include broad-spectrum UV–visible sensors, UV sensors, self-test sensors, lens-type sensors, flange-mounted sensors, wide-angle point sensors and light-sensitive optical-fiber sensors.

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.

• The GWPC400-CMC Station Common Measurement and Control Panel is designed for station-wide common signal acquisition, busbar voltage supervision, equipment status monitoring and remote control in substations, power plants and renewable energy facilities.
• Built around the GWPR400-CMC Common Measurement and Control Unit, the panel serves as an interface between primary equipment, station auxiliary systems and the substation automation system or SCADA platform. It collects analogue measurements, binary status signals and alarm indications while providing supervised control and remote regulation functions for designated station equipment.
• The GWPC400-CMC is suitable for both conventional and digital substation applications. It can be configured for projects at voltage levels such as 132 kV, 66 kV and 33 kV, as well as other voltage levels subject to project requirements.

• The GWPC-DFR Digital Fault Recorder Panel is designed for power plants, substations, renewable energy facilities, and industrial power systems. It continuously monitors and records electrical quantities, equipment status signals, and protection events before, during, and after power system faults and disturbances.
• By integrating transient fault recording, continuous disturbance recording, sequence-of-events recording, fault analysis, and time synchronisation, the GWPC-DFR provides reliable data for reconstructing the chronology of disturbance events, analysing protection performance, locating faults, and evaluating the dynamic and operational performance of the power system.
• The GWPC-DFR is primarily a monitoring, recording, and analysis system. It does not replace protection relays and is not normally used to issue protection trip commands.