GWPC300‑LP Line Protection & Control Panel
Product Desc
- The GWPC300-LP Line Protection & Control Panel is a complete bay-level solution developed by GoWatron for medium-voltage power systems up to 33 kV. The panel is equipped with the GWPR320-LD Line Fiber-optic Differential Protection Relay, the GWPR320-DIS Line Distance Protection Relay, and the GWPR320-BCU Bay Control Unit. Fiber-optic pilot differential protection and distance protection are implemented on two physically independent protection relays, adopting a separate-hardware main-plus-backup protection architecture that integrates line protection with bay-level measurement and control functions.
- Designed in compliance with IEC, ANSI, IEEE and other international standards, protection trip logic runs locally within the protection devices and is independent of the station-level communication network. Even if the supervisory communication link is interrupted, the protection devices can still perform fault discrimination and trip output autonomously. The panel supports IEC 61850, IEC 60870-5-104, and DNP3.0 communication protocols for seamless integration with SCADA and substation automation systems. It is applicable to utility substations, industrial substations, renewable-energy step-up stations, and overseas power projects.
- Panel dimensions: 2260 × 800 × 600 mm (H × W × D).
Measurement Accuracy
≤ 0.2%
Quick Response
≤ 20 ms
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
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.
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