GWPR300‑FS Fault Separation Relay Left‑Side View

GWPR300‑FS Fault Separation Relay Terminal Diagram

GWPR300‑FS Fault Separation Relay

Functions(ANSI) 59N 27 59 81U 81O 78 60 95

Product Desc

The GoWatron GWPR300‑FS Fault Separation Relay is designed for fault separation on the load‑side or small‑generation‑side applications for 132 kV, 33 kV and 10 kV (or 11 kV) voltage levels. It is widely deployed in hydropower plants, thermal power plants and gas‑fired power plants. Upon occurrence of faults such as over‑/under‑frequency and over‑/under‑voltage, the relay trips the generator circuit breaker to isolate the local plant from the utility grid and reliably disconnects faulty power sources, maintaining safe and stable operation of the power system.
Dual Ethernet ports supporting IEC 60870‑5‑104/103; IEC 61850 available as option;
RS485 interface for Modbus‑RTU. Supports IRIG‑B, SNTP and message‑based time‑sync modes.

Request Quote

+8617621210051

+86-17621210051

Accuracy

≤ 0.2%

Quick Response

≤ 100ms

Reliable Protection

Comprehensive Protection

Quality Assurance

ISO 9001 Certified

Technical Support

24/7 Expert Support

Fast Delivery

Global Shipping

Warranty

2-Year Warranty

Product Description

The GWPR300‑FS Fault Separation Relay adopts a 32‑bit high‑performance microcontroller with DSP floating‑point processing unit and 16‑bit high‑precision independent AD sampling. It adopts a dual hardware‑software anti‑interference design and supports both panel‑mounted cabinet installation and direct switchgear mounting.
The unit adopts a fully‑enclosed enclosure with strict separation between strong‑current and weak‑current circuits. Its modular hardware design facilitates expansion and maintenance. Real‑time calculation for all analog and binary‑input signals is completed within each sampling cycle. A sampling bad‑point filtering algorithm is implemented to improve anti‑interference performance for AC signal acquisition.
The device offers a friendly human‑machine interface along with on‑site local debugging functions. Comprehensive event‑logging and fault‑recording capabilities are available. The device meets relevant power‑industry standards for EMC, insulation and mechanical performance, and operates stably over a wide temperature range of ‑40 °C to 70 °C. CT/PT ratings and binary‑input supply voltage can be customized upon project request to satisfy various site requirements.

Product Functions

Protection Functions

(ANSI 59N) Neutral‑Overvoltage Separation Stage I / II (Trip)
(ANSI 27) Under‑Voltage Separation Stage I / II / III (Trip)
(ANSI 59) Over‑Voltage Separation Stage I / II / III (Trip)
(ANSI 81U) Under‑Frequency Separation Stage I / II / III / IV / V (Trip)
(ANSI 81O) Over‑Frequency Separation Stage I / II / III (Trip)
(ANSI 78) Out‑of‑Step Separation Stage I / II (Trip)
(ANSI 60) PT Circuit Failure (Alarm)
(ANSI 95) External Trip Input 1 / 2 (Trip / Alarm)

Other Functions

Measurement & Control Functions: Collects three‑phase voltages, residual zero‑sequence voltage, three‑phase currents, active/reactive power, power factor and four‑quadrant energy; supports 21 active binary inputs, 13 independent relay trip outputs plus 1 device‑power‑loss signal output. Measurement accuracy reaches Class 0.2.
Event‑Logging & Printing: Classified storage for protection events, alarm events, binary‑input status changes, operation logs and self‑test events. Up to 32 fault‑recording records can be stored. Serial‑port printer support for printing settings, event logs and fault records.
Local Debugging: Supports output‑relay test, communication‑loop test, event simulation and system reset to facilitate on‑site commissioning and verification.

Application Scenarios

Hydropower plants, thermal power plants, gas‑fired power plants: Installed at the generator grid‑connection side. Rapidly separates generators under fault conditions to prevent islanding and secure main‑grid safety.
Distribution substations and switchgears: Applied on the load‑side of 10 kV (or 11 kV), 33 kV, 132 kV systems for load separation upon voltage deviation, frequency deviation and out‑of‑step oscillation faults.
Distributed‑generation grid‑connection switchgears: Direct‑mounted inside switch cabinets for local fault‑separation protection for distributed power sources.
Protection panels for small‑generation stations: Cabinet‑mounted for grid‑connection fault‑separation protection within power‑plant and distributed‑generation facilities.
Distributed‑power‑supply stations with island‑risk concerns: Provides anti‑islanding protection to mitigate equipment and grid hazards caused by voltage loss, frequency drift and system oscillation.

Frequently Asked Questions (FAQ)

Q:Can a 10MW hydropower plant use the GWPR300‑FS Fault Separation Relay?

Yes. The GWPR300‑FS is designed for fault separation on the load‑side or small‑generation‑side applications at 132 kV, 33 kV and 10 kV (or 11 kV) voltage levels, with hydropower plants being one of its typical application scenarios. From a capacity perspective, a 10MW unit falls within the medium‑to‑small hydro range and is well within the relay's applicable scope.

It should be noted that the core function of a fault separation relay is to rapidly trip the generator circuit breaker upon occurrence of abnormal frequency, voltage or out‑of‑step oscillation, thereby decoupling the local plant from the grid and preventing islanding. This function has no inherent "upper limit" constraint directly related to generator capacity; rather, it depends more on the grid‑connection voltage level, system configuration and protection philosophy. The GWPR300‑FS provides comprehensive protection functions including under‑frequency / over‑frequency separation, under‑voltage / over‑voltage separation, out‑of‑step separation and neutral‑overvoltage separation, fully covering the fault‑separation protection requirements of a 10MW hydropower plant.

In practice, units up to 100MW have also employed similar devices in conjunction with main generator protection. For project‑specific selection, it is recommended to provide the plant's electrical main wiring diagram and CT/PT parameters to the manufacturer for configuration verification.

Q: What is the difference between the GWPR300‑FS and a generator protection relay? Can they replace each other?

They cannot replace each other; they serve complementary roles.

A generator protection relay (e.g., differential protection, composite overcurrent protection, stator earth‑fault protection, etc.) is primarily tasked with protecting the generator itself, tripping swiftly upon internal faults such as inter‑turn short circuits, phase‑to‑phase short circuits or earth faults to prevent equipment damage.

The GWPR300‑FS Fault Separation Relay, by contrast, is primarily tasked with protecting the power system – upon occurrence of frequency deviations, voltage abnormalities or out‑of‑step oscillations on the grid side, it decouples the local plant from the utility grid, preventing the small‑power source from impacting the grid or forming an unintended island.

The relationship can be summarized as: generator protection safeguards "internal" faults, while fault separation safeguards the "grid‑interface" side. In scenarios such as hydropower and thermal power plants, both types of relays are typically used together – the generator protection relay handles unit‑internal faults, while the fault separation relay handles grid‑connection fault‑separation protection.

Q:Can the GWPR300‑FS be installed directly inside a switchgear cubicle?

Yes.
The GWPR300‑FS supports both panel‑mounted cabinet installation and direct switchgear‑mounting. The unit features a fully‑enclosed enclosure with strict separation between strong‑current and weak‑current circuits, and is designed with modular hardware. It operates stably over a wide temperature range of ‑40 °C to 70 °C, and is capable of withstanding the electromagnetic environment and temperature/humidity conditions typically encountered inside switchgear.

For specific installations, it is recommended to select the appropriate method based on the station's cabinet space, secondary wiring layout and maintenance practices. For distributed‑generation grid‑connection switchgear, on‑site mounting is often the more convenient approach.

Q:What communication protocols and time‑synchronization modes does the GWPR300‑FS support?

The GWPR300‑FS offers flexible communication and time‑synchronization capabilities:
• Communication Protocols: Dual Ethernet ports support IEC 60870‑5‑104, with IEC 61850 (including MMS) available as an option; the RS485 interface supports Modbus‑RTU.
• Time‑Synchronization Modes: Supports IRIG‑B, SNTP network‑based synchronization and message‑based time‑synchronization, accommodating various station‑level time‑synchronization system requirements.
The comprehensive communication interface suite enables the GWPR300‑FS to be readily integrated into station monitoring systems, dispatch control centres or digital substation communication networks.

Q: What data can the GWPR300‑FS record, and how can it be used for fault analysis?

The GWPR300‑FS provides comprehensive event‑logging and fault‑recording capabilities:
• Classified Event Storage: Protection events, alarm events, binary‑input status changes, operation logs and self‑test events are stored in separate categories, enabling quick retrieval by maintenance personnel.
• Fault Recording: Supports up to 32 fault‑recording records in standard COMTRADE format, capturing pre‑fault, during‑fault and post‑fault voltage/current waveforms as well as binary‑input status – providing precise evidence for fault‑cause analysis.
• Printing Support: Supports serial‑port printer connectivity for printing settings, event logs and fault records, allowing on‑site personnel to generate hard‑copy documentation directly.
After a separation operation triggered by under‑frequency, under‑voltage, out‑of‑step or other conditions, maintenance personnel can quickly identify the root cause – whether it was a grid‑side disturbance, generator abnormality or maloperation – by reviewing the recorded waveforms and event sequences, thereby facilitating efficient follow‑up actions.

Q:Why should a small‑power station be equipped with a fault separation relay such as the GWPR300‑FS?

When a small‑power source (hydropower, thermal, gas‑fired, PV, etc.) is connected to the grid, failure to decouple promptly during a grid‑side fault can introduce multiple risks:
1. Reduced auto‑reclosing success rate: The small‑power source may feed current into the fault point, preventing the system‑side recloser from detecting a dead‑line condition (loss‑of‑voltage) and thereby causing reclosing failure, prolonging the outage area.
2. Threat to transformer insulation integrity: When a small‑power source remains connected during a single‑phase‑to‑earth fault in an ungrounded or impedance‑grounded system, the healthy‑phase voltages may rise to √3 times nominal voltage, potentially damaging transformer neutral insulation.
3. Unintentional islanding: The small‑power source may continue supplying a portion of local load in an uncontrolled island, with frequency and voltage outside allowable limits, potentially damaging equipment and even creating safety hazards to personnel.