GWPR300‑GT Generator‑Transformer differential Unit Protection Relay
Product Desc
- GWPR300‑GT Generator‑Transformer Unit differential Protection Relay is an integrated protection, measurement and control device launched by GoWatron specifically for generator‑transformer units. It is designed for small‑to‑medium‑size generator‑transformer units with capacity up to 10 MW (typical application scope; other capacities can be customized), compatible with generator‑transformer connections at voltage levels up to 132 kV. It supports both centralized panel‑mounted and decentralized field‑mounted deployment. It is mainly applied for relay protection and local / remote measurement‑control requirements of generator‑transformer units in self‑supply power plants and small‑scale power stations.
- Communication: Dual Ethernet ports support IEC 60870‑5‑104 / 103 protocols, IEC 61850 is optional; RS485 supports Modbus‑RTU.
- Time Synchronization: Supports IRIG‑B (DC code), SNTP, message‑based time synchronization and other time‑sync modes.
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
- GWPR300‑GT Generator‑Transformer Unit differential Protection Relay adopts a high‑performance 32‑bit microcontroller integrated with DSP (Digital Signal Processor) and FPU (Floating‑Point Unit), equipped with 16‑bit high‑precision AD sampling. It integrates main protection, backup protection, measurement, control and fault recording functions.
- Adopting fully‑enclosed chassis construction, high‑voltage and low‑voltage circuits are strictly isolated. Both hardware and software anti‑interference measures are implemented to satisfy stringent EMC, insulation and mechanical performance criteria.
- Modular plug‑in hardware consists of AC module, power supply module, output module, digital‑input module, CPU module and man‑machine interface module. It is configured with 21 active digital inputs, 11 protection outputs, 2 signal outputs and 1 power‑failure alarm output.
- Equipped with LCD + keypad HMI, it supports parameter setting, event review, fault oscillography, local output trip test and serial‑port printing.
- The device automatically performs CT (Current Transformer) balance scaling and phase compensation for each side of the generator‑transformer unit. It implements main unit differential protection including differential quick trip and restrained differential, together with comprehensive backup protection and abnormal alarm monitoring. Protection elements are modular and independently configurable. Setting groups and soft‑logic switches support both local and remote modification & management.
Product Functions
Protection Functions
- (ANSI 87GT) Differential Instantaneous Trip (Trip)
- (ANSI 87GT) Restrained Differential Protection (Trip)
- CT Circuit Failure Alarm (Instantaneous signal output, delayed alarm)
- Differential Current Exceedance Alarm (Alarm)
- (ANSI 50/51/51V) Phase Overcurrent Stage I / II / III (Trip, with residual‑voltage blocking available)
- (ANSI 51) Inverse‑time Overcurrent (Trip; Normal / Very / Extremely inverse characteristics selectable)
- (ANSI 51) Overload Protection (Alarm / Trip optional)
- (ANSI 46) Negative‑Sequence Overcurrent Stage I (Trip)
- (ANSI 46) Negative‑Sequence Overcurrent Stage II (Alarm / Trip optional)
- (ANSI 51N) Neutral Overcurrent Stage I / II (Trip, with neutral‑voltage blocking available)
- (ANSI 51N) Neutral Overcurrent Stage III (Alarm / Trip optional)
- (ANSI 59) Overvoltage Protection (Trip)
- (ANSI 27) Undervoltage Protection (Alarm / Trip optional)
- (ANSI 59N) Neutral Overvoltage Protection (Alarm / Trip optional)
- (ANSI 60) PT (Potential Transformer) Circuit Failure (Alarm)
- Overcurrent Protection Inhibit on PT Failure (Logic blocking, configurable, default disabled)
- Undervoltage Protection Blocking on PT Failure (Logic blocking)
- (ANSI 74) Control‑circuit Break Alarm (Alarm)
- System De‑energization Alarm (Alarm)
- Transformer Door‑open Alarm (Alarm)
- Load Control Input (Alarm / Trip optional)
- (ANSI 63) Buchholz Low‑gas Alarm (Alarm)
- (ANSI 63) Buchholz High‑gas Trip (Trip)
- (ANSI 49) Temperature Rise Alarm (Alarm)
- (ANSI 49) Overtemperature Protection (Trip)
- Thermal / Hydraulic‑process Fault Input (Alarm / Trip optional)
- (ANSI 40) Loss‑of‑Excitation Protection (Alarm / Trip optional)
Measurement & Control Functions
- Acquire three‑phase voltages, three‑phase currents and residual‑quantities; measure active power, reactive power and power factor; calculate four‑quadrant energy.
- Multiple active digital inputs for circuit‑breaker / disconnector status and non‑electrical signals.
- Relay dry‑contact outputs for protection tripping and signal output.
Fault Recording & Event Handling
- Fault oscillography captures pre‑fault and post‑fault waveforms; maximum storage capacity for 32 fault records.
- Complete event log and SOE (Sequence‑of‑Events) recording; support local viewing and serial‑port report printing.
- Support local output contact test and event simulation debugging.
Human‑Machine & Commissioning Functions
- Local LCD menu for device parameters, protection settings, control‑word and output‑logic configuration.
- Password‑based privilege management; support setting‑group online copy and switching for convenient site commissioning & maintenance.
