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.

GWPR200-FS Fault Separation Relay

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

Product Desc

The GWPR200-FS Fault Separation Relay is suitable for the load side or small power source side of 33 kV, 22 kV, 11 kV and lower-voltage power systems. When specified grid fault or abnormal operating conditions are detected, the relay rapidly issues a trip command to separate the local power system or small power source from the utility grid, helping prevent the disturbance from further affecting the local system. It is widely used in hydroelectric, thermal, photovoltaic, gas turbine and captive power plants. It can be installed in a panel or locally in a switchgear cabinet. The device employs a high-speed 32-bit microcontroller with an integrated DSP and floating-point unit (FPU), integrating protection, measurement, energy metering, communication, fault recording and time synchronisation functions. It features a large LCD display and a user-friendly operating menu. Each protection and separation function is modular, functionally independent and flexibly configurable.
Communication Functions (listed by hierarchy):
2 Ethernet ports (supporting IEC 60870-5-103, optional)
1 RS-485 communication port (supporting Modbus RTU)

+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 voltage levels and applications is the GWPR200-FS Fault Separation Relay suitable for? Can it be used at 33 kV/22 kV/11 kV? How should a fault separation relay be selected?

A1: It is suitable for fault separation on the load side or small power source side of 33 kV, 22 kV, 11 kV and lower-voltage power systems. It is widely used in hydroelectric, thermal, photovoltaic, gas turbine and captive power plants. It can be installed in a panel or locally in a switchgear cabinet.

Q:What communication protocols does the GWPR200-FS Fault Separation Relay support? How are IEC 60870-5-103 and Modbus RTU interfaces configured?

A2: The standard configuration includes 1 RS-485 communication port supporting Modbus RTU; 2 Ethernet ports supporting IEC 60870-5-103 are optional. Time synchronisation supports protocol-based time synchronisation, SNTP and IRIG-B.

Q:What protection and separation functions does the GWPR200-FS provide? What are the corresponding ANSI codes?

A3: The relay provides Overvoltage Separation Stage I/II/III (ANSI 59), Undervoltage Separation Stage I/II/III (ANSI 27), Zero-Sequence Overvoltage Separation Stage I/II (ANSI 59N), Overfrequency Separation Stage I/II/III (ANSI 81O), Underfrequency Separation Stage I/II/III/IV/V (ANSI 81U), VT Circuit Failure Alarm (ANSI 60), and External Intertrip 1/2. Each function is modular, functionally independent and flexibly configurable.