What overcurrent protection types does the GWPR100-I Digital Integrated Protection Relay support?

The GWPR100-I Digital Integrated Protection Relay provides a comprehensive phase overcurrent protection scheme, including: • Instantaneous Overcurrent Stage I (ANSI 50) • Definite-Time Overcurrent Stage II (ANSI 51P) • Definite-Time Overcurrent Stage III (ANSI 51) • Inverse-Time Overcurrent (ANSI 51) • Close-On-Fault Acceleration Protection (ANSI 50/51) • Overload Protection (ANSI 51) These protection types can be flexibly selected or combined based on site-specific load characteristics, meeting the full range of current protection requirements from feeder lines to distribution transformers.

What voltage levels and primary equipment are applicable to the GWPR100-I Digital Integrated Protection Relay?

The GWPR100-I Digital Integrated Protection Relay is applicable to medium and low voltage distribution systems up to 13.8 kV and 11 kV, covering primary equipment such as feeder cabinets, distribution transformers, shunt capacitor banks, bus tie breakers, and asynchronous motors. It also supports 400 V low-voltage distributed photovoltaic grid-connection protection, making it suitable for a wide range of application scenarios including industrial facilities, photovoltaic power stations, and substations.

What voltage protection functions does the GWPR100-I Digital Integrated Protection Relay support?

The GWPR100-I Digital Integrated Protection Relay provides comprehensive voltage and frequency abnormality protection, including: Overvoltage (ANSI 59) Undervoltage (ANSI 27) Zero-Sequence Overvoltage (ANSI 59N) Underfrequency Load Shedding (ANSI 81L) VT Disconnection Alarm (ANSI 60) These voltage protection functions effectively safeguard equipment against abnormal voltage conditions, ensuring reliable operation of distribution systems, motors, capacitor banks and photovoltaic grid-connected systems.

GWPR300-TNE Transformer Non-Electrical Quantity Protection Relay

Functions(ANSI) 63 26 71

Product Desc

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.

+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

Protection Functions

Phase Overcurrent Protection

(ANSI 50) Instantaneous Overcurrent Stage I
(ANSI 51P) Definite-Time Overcurrent Stage II
(ANSI 51) Definite-Time Overcurrent Stage III
(ANSI 51) Inverse-Time Overcurrent
(ANSI 50/51) Close-On-Fault Acceleration Protection
(ANSI 51) Overload Protection

Asynchronous Motor-Specific Protection

(ANSI 48) Motor Start Blocking
Earth Zero-Sequence Protection
(ANSI 51N) Definite-Time Zero-Sequence Overcurrent
(ANSI 51N) Inverse-Time Zero-Sequence Overcurrent

Autoreclosing

(ANSI 79) Line Autoreclosing

Voltage/Frequency Abnormal Condition Protection

(ANSI 59) Overvoltage
(ANSI 27) Undervoltage
(ANSI 59N) Zero-Sequence Overvoltage
(ANSI 81L) Underfrequency Load Shedding
(ANSI 60) VT Disconnection Alarm
Shunt Capacitor Bank Dedicated Protection
(ANSI 60) Capacitor Unbalance Overvoltage
(ANSI 46) Capacitor Unbalance Overcurrent
(ANSI 50) Capacitor Switching Inrush Protection

Unbalanced Fault Protection

(ANSI 46) Negative-Sequence Overcurrent

Secondary Circuit Supervision

(ANSI 74) Circuit Breaker Control Circuit Supervision
(ANSI 27/59) System Loss-of-Voltage Protection

Non-Electrical Quantity Protection

(ANSI 63) Transformer Cabinet Door Interlock
(ANSI 63) Buchholz Trip Protection (Heavy Gas)
(ANSI 63) Buchholz Alarm (Light Gas)
(ANSI 63) Winding Overtemperature Trip
(ANSI 63) Equipment Overheating Warning
(ANSI 95) Remote Load Shedding Trip

Other Functions of the Product

GWPR100-I Digital Protection Relay with Measurement, Control & Communication Functions

Technical Specifications

GWPR100-I Digital Integrated Protection Relay Technical Specifications

Structure and Mounting Dimensions

Mounting Type: Standard flush panel mounting. It can be installed singly on local or assembled in multiple units inside centralized control racks.
Rear Board Dual-Module Plug Design:
Plug A: Analog quantity acquisition circuit, RS485 communication circuit
Plug C: Relay auxiliary power supply, 10-channel digital inputs, 4 groups of relay output contacts
Grounding Requirement: The rear grounding terminal must be reliably connected to ground via copper conductors with a cross-sectional area of no less than 4 mm².

GWPR100-I Digital Integrated Protection Relay – Dimensional Drawing

Typical Application Scenarios

Medium and low voltage distribution systems up to 13.8 kV / 11 kV: for feeders, distribution transformers, shunt capacitor banks and bus tie breakers
Medium and low voltage asynchronous motor loops: Integrated protection relay for 0.4 kV / 6 kV / 11 kV / 13.8 kV motors, covering start-up, overload, unbalance and overtemperature fault protection
Distributed photovoltaic grid connection points: Backup protection relay for 13.8 kV / 11 kV / 400 V PV grid-tied sides, monitoring overcurrent, over/undervoltage and earth faults
Industrial plant power distribution rooms: Local protection relay for switchgears in chemical, manufacturing, data center and industrial park projects
Small substations, outdoor prefabricated substations and switching stations: Specialized integrated protection relay for outdoor environments with wide temperature range and high electromagnetic interference

Frequently Asked Questions (FAQ)

Q:What is a transformer non-electrical quantity protection relay?

A transformer non-electrical quantity protection relay receives and evaluates signals generated by the transformer’s mechanical and thermal monitoring devices rather than calculating protection functions from current or voltage measurements. These signals may include Buchholz alarm, Buchholz trip, high temperature, cooling-system failure, pressure-relief device operation, and abnormal oil level. The relay processes each input according to its configured logic and time delay and then initiates a trip or alarm output.

Q:What protection functions does the GWPR300-TNE transformer non-electrical quantity protection relay support?

The GWPR300-TNE transformer non-electrical quantity protection relay provides ten configurable non-electrical quantity protection elements, including main-tank Buchholz alarm, main-tank Buchholz trip, OLTC Buchholz alarm, OLTC Buchholz trip, high temperature, very high temperature, cooling-system failure, pressure-relief device operation, abnormal oil temperature, and abnormal oil level. Each protection element has an independent time delay and can be configured for either trip or alarm operation.

Q:What is an ANSI 63 transformer Buchholz protection relay?

An ANSI 63 transformer Buchholz protection relay receives alarm and trip signals from gas-actuated devices installed on an oil-immersed transformer. The GWPR300-TNE processes Buchholz alarm, Buchholz trip, pressure-relief, temperature, oil-level, and cooling-system failure signals and initiates the configured alarm or trip outputs.