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Leon Zhang sales consultant
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Email: zxl635973785@gmail.com
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Phone/WhatsApp: +86 13655813266
Line Protection and Control Panel | Fiber Differential & Distance Protection
Our Line Protection and Control Panel is an integrated substation solution for 11kV–110kV transmission & distribution lines. Customizable with line differential protective relay (fiber differential) or multi-stage distance relays as core units, it provides full fault protection, real-time measurement, remote control and intelligent communication.
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Description
Overview of Line Protection and Control Panel
Our Line Protection and Control Panel is an integrated substation solution for 11kV–110kV transmission & distribution lines. Customizable with line differential protective relay (fiber differential) or multi-stage distance relays as core units, it provides full fault protection, real-time measurement, remote control and intelligent communication.
It is widely applied in industrial substations, commercial power stations, photovoltaic and wind power grid-connected projects, municipal power distribution systems and EPC power projects.
Assembled with high-precision microcomputer protection relays, industrial-grade control components and standardized cabinet structure, this protection panel features stable operation, fast fault response and flexible configuration.
It solves the pain points of traditional line protection such as single function, slow tripping speed and poor anti-interference ability, ensuring safe, stable and efficient operation of overhead lines and cable lines.
Core Configurations & Working Principles (Customizable by Project)
Fiber Differential Protection Configuration (For Critical Lines)
Equipped with numerical line differential protection relays , this configuration is the optimal solution for important tie lines, short cable lines and ring network lines that require full-line instantaneous tripping. The relays exchange real-time current vector data between two ends of the line via dedicated optical fiber channels, accurately identifying internal and external faults based on current differential principles.
It realizes zero-delay full-line tripping for internal faults and reliable locking for external faults, completely avoiding protection mismatch and delayed action. It supports CT saturation detection, phase difference compensation and broken fiber alarm, with outstanding selectivity and speed, effectively preventing line short circuit and equipment burnout faults.
Distance Protection Configuration (For Conventional & Long Lines)
Configured with transmission line protection distance relays, it adapts to long-distance overhead transmission lines and conventional distribution lines. By real-time monitoring of line impedance changes, it accurately judges fault locations and realizes segmented protection (Zone 1/2/3).
Relays for transmission line protection are equipped with 3-stage overcurrent, zero-sequence, overload and auto-reclosing functions to handle phase short, earth and overload faults. Flexible settings and wide environmental adaptability fit most standard distribution projects.
Main Functions
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Full Fault Protection: Cover fiber differential, distance protection, overcurrent, zero-sequence, overload, overvoltage/undervoltage and PT disconnection detection, realizing all-round line fault monitoring.
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Intelligent Measurement & Control: Real-time collection of line voltage, current, power, frequency and other operating data, supporting local display and remote data upload.
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Automatic Reclosing: Built-in high-precision reclosing logic, adaptable to transient and permanent line faults to improve power supply reliability.
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Fault Recording & Alarm: Automatically record fault time, fault type and operating parameters, with sound-light alarm and remote alarm output for quick troubleshooting.
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Standard Communication: Support IEC61850, IEC60870-5-103 and Modbus protocols, compatible with mainstream substation automation systems for seamless networking.
Product Features
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Flexible Customization: Switchable core protection schemes (fiber differential / distance protection) according to project voltage level, line type and grid operation requirements.
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Fast Fault Response: Microcomputer protection chip ensures millisecond-level tripping, minimizing fault diffusion and equipment loss.
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High Stability & Anti-interference: Industrial-grade cabinet and components, strong electromagnetic anti-interference ability, suitable for harsh outdoor and substation environments.
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Easy Installation & Commissioning: Standard internal wiring, modular structure, convenient parameter setting, testing and later maintenance.
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Full Compliance: Comply with international IEC and domestic power industry standards, fully meeting project safety and compliance acceptance requirements.
Application Scope
Our Line Protection and Control Panel is suitable for 11kV, 22kV, 33kV and 110kV transmission & distribution lines, widely applied in power plant booster stations, industrial and mining substations, new energy grid-connected stations, municipal power grids, railway power supply systems and all kinds of EPC power projects.
FAQ
1. What is a Line Protection and Control Panel used for?
Our Line Protection and Control Panel is a dedicated cabinet solution for 10kV–110kV power lines. It integrates fault protection, real-time measurement, local/remote control and communication, ensuring stable operation of power transmission and distribution systems for industrial substations, new energy grid connection and EPC projects.
2. What are the two core protection configurations of your line protection panel?
We offer two customizable core protection schemes to fit diverse project needs: Fiber Differential Protection and Multi-stage Distance Protection. The configuration is flexibly determined based on line voltage, length and grid operation conditions.
3. What is the difference between fiber differential protection and distance protection?
Fiber Differential Protection is designed for critical tie lines, ring networks and short cable lines. It delivers zero-delay full-line tripping via optical fiber transmission, with no protection dead zone and high accuracy for key power supply lines.
Distance Protection suits long-distance overhead lines and conventional distribution lines. It locates faults by monitoring line impedance, supports 3-stage segmented protection, and integrates overcurrent, zero-sequence protection and auto-reclosing for universal power distribution scenarios.
4. What voltage levels do your line protection panels support?
Our panels cover mainstream voltage levels including 10kV, 35kV, 66kV and 110kV, applicable to industrial, municipal, commercial and new energy power engineering projects.
5. What protection functions does the panel integrate?
Equipped with core fiber differential or distance protection, the panel integrates overcurrent, zero-sequence, overload, over/under voltage and PT disconnection protection. It also supports auto-reclosing, fault recording and sound-light alarm for comprehensive line safety protection.
6. What communication protocols do your protection panels support?
It supports mainstream protocols including IEC61850, IEC60870-5-103 and Modbus, compatible with most substation automation systems to realize remote monitoring, data transmission and intelligent control.
7. Is your line protection panel compliant with international standards?
Yes. All our panels and protection devices comply with IEC international standards, with stable performance and complete qualifications, fully meeting acceptance standards for overseas power grid and EPC projects.
8. Is the protection scheme customizable for different projects?
Yes. We provide full customized solutions. We flexibly configure fiber differential or distance protection, and adjust parameters, cabinet layout and functional modules according to your on-site project requirements.
9. What are the application scenarios of your line protection panel?
Widely applied in power plant booster stations, industrial self-use substations, PV/wind grid-connected stations, municipal distribution networks, railway power supply and various power transmission EPC projects.
10. Is the panel easy to install and commission?
Featuring modular structure and standardized wiring, our panels support simple on-site installation, flexible parameter debugging and convenient later maintenance, saving project construction and after-sales costs.
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High Quality
Stable performance, reliable design, ensuring safe operation for power system protection and grid stability.
Fast Delivery
Timely delivery to support your urgent orders and project schedules efficiently and professionally at any time.
Best Warranty
Professional Warranty: Reliable after-sales support for stable relay protection and long-term customer satisfaction.
Jack –
The cabinet is reasonably designed and meets all operational requirements, passing acceptance inspection smoothly.
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