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Protection and Control Panels

Protection and control panels provide reliable relay protection, monitoring, and control functions, ensuring safe operation and efficient management of power systems.

Protection and Control Panels

Protection and Control Panels

Protection and control panels act as the core control hub of power plants and substations, normally installed in the secondary equipment control room. Common types include transformer protection panels, generator protection panels and other variants, with each panel performing distinct functions.

Meanwhile, the internal configuration of panels is not fixed, which shall be subject to the technical requirements of specific projects.

If you have any project consultation, scheme matching or customized configuration demands for protection and control panels, feel free to contact our professional technical team for one-stop customized solutions.

Solid industry experience and robust technical expertise in Protection and Control Panels

Backed by decades of power system expertise in grid protection and automation, we supply tailor-made protective relay and control panels for all voltage grades and scenarios in power plants, substations and industrial power systems, fully compliant with international standards.
Beyond standard products, we deliver custom engineering for complex power projects. Our one-stop service covers design, production, testing, commissioning and lifelong technical support.

Professional Custom Design Capabilities for Unique Project Requirements

Every power engineering project has unique operating conditions, grid architectures and environmental demands for protection relay panels. Rejecting inflexible universal configuration schemes for protection relay panels, we leverage our senior power design specialists and validated industrial engineering database to deliver tailor-made customized design solutions of protection relay panels for global customers.

Schematic-Level Scheme Optimization & Risk Prevention

In the project preliminary design stage, our professional engineers conduct comprehensive analysis of the primary single-line diagram, system operation mode, load characteristics, and station automation level for protection relay and control panels.
We optimize protection configuration schemes and internal secondary wiring schemes of the panels in strict accordance with IEC and national power industry standards.
All protection logic and setting coordination is fully verified to effectively eliminate potential risks such as protection false tripping and refusal-to-trip, ensuring long-term stable operation of the protection relay and control panels and other power equipment.

Accurate Implementation of All Non-Standard Engineering Demands

We fully adapt to special technical requirements of complex projects for relay protection panels, including custom interface protocols, exclusive signal definition, non-standard panel size and color customization, and extreme environment adaptation.
Our relay protection panel solutions are widely applicable to high-altitude, high-humidity, salt-fog corrosion, and strong electromagnetic interference scenarios.
Our design team can quickly respond to technical specification requirements, output standardized engineering drawings and construction plans, and accurately implement every personalized technical demand of clients.

Highly Integrated Panel Design to Improve System Reliability

To solve on-site space limitations and excessive inter-device wiring problems, we support flexible integrated design of multiple core functions for relay protection and control panels, including protection, control, measurement, metering, intelligent communication, fault recording, PLC sequence control, and grid synchronization.
Multiple functional modules are centrally integrated into one or a group of relay protection and control panels, which greatly reduces cross-panel cables, simplifies on-site construction, and significantly improves the overall stability and maintainability of the power automation system.

Strict Full-Process Quality Control & Standardized Test Verification System

Quality stability is the core credibility of power system panel equipment.
We have established a closed-loop quality management system covering design, procurement, production, and testing for custom protective relay panels, with all processes implemented in accordance with international industry standards, ensuring every delivered custom protective relay panel meets high-standard power engineering acceptance requirements.

Standardized Whole-Production Quality Inspection

We implement strict quality checkpoints throughout the entire production process of protective relay panels, including incoming component testing, standardized panel assembly, and standardized secondary wiring for protective relay panels.
Adopting professional processes such as unified wire number marking, layered wiring trough layout, and strong and weak current isolation, we ensure every protective relay panel achieves 100% accurate wiring, neat and standardized internal layout, and convenient daily maintenance and later equipment upgrade.

100% Full-Item FAT Factory Acceptance Testing

Fitted with high-precision relay protection testers, digital analog generators and multi-protocol communication analyzers, we conduct full FAT testing on all protection relay panels before delivery. All tests comply with IEC 61850, IEC 60255 and other international standards and project technical specs.
Comprehensive tests cover protection setting verification, logic tripping, analog fault simulation, DI/DO calibration, GOOSE/MMS communication and interlock logic inspection. Full official FAT reports accompany every batch of protection relay panels to ensure qualified factory performance.

Professional On-Site SAT Joint Commissioning Support

Our service is not limited to equipment manufacturing. Our on-site engineering team provides full-process SAT technical support, including on-site installation guidance, wiring inspection, single equipment debugging, whole-station system joint debugging, and load test verification.
We ensure seamless docking between protection and control panels, primary power equipment, and station-level monitoring systems, helping clients complete project acceptance efficiently and stably.

Powerful System Integration & Cross-Brand Communication Interoperability

Against fast-upgrading smart substations and digital power plants, open communication compatibility and system interoperability are core performance metrics for power automation equipment.
Drawing on extensive experience in digital power reconstruction projects, we deliver highly compatible system integration solutions built around ht panel protection relays.

Full Coverage of Mainstream International Communication Protocols

Our ht panel protection relays & integrated protection and control panels support all mainstream industrial protocols: IEC 61850 (GOOSE, MMS, SV), IEC 60870-5-103/104, Modbus RTU/TCP and DNP3.
For both new smart substation construction and conventional automated substation retrofits, our equipment enables steady data interconnection with monitoring systems, RTUs, intelligent terminals and merging units from all mainstream manufacturers without any communication obstacles.

Whole-Station Data Interconnection & Unattended Operation Support

Through the coordinated matching of RTU communication panels, public measurement and control panels, and SCADA monitoring panels, we realize full-featured whole-station data management functions, including remote modification of protection settings, remote fault diagnosis, accurate SOE sequence of events recording, and complete four-remote functions (remote measuring, remote signaling, remote control, remote regulation). Effectively help power stations and substations realize low-manpower or unattended intelligent operation, reducing long-term operation costs.

Full-Lifecycle Technical Support & 24/7 Rapid After-Sales Response

We adhere to long-term cooperative service concepts and provide clients with full-lifecycle one-stop technical services from pre-sales consultation to after-sales operation, maintenance, and equipment upgrade, ensuring stable and long-term operation of customer equipment.

Professional Pre-Sales Technical Consulting & Scheme Customization

In the pre-sales stage, our professional technical team provides free equipment selection consultation, project scheme demonstration, technical feasibility analysis, and drawing coordination services.
Combined with project grid parameters and operation requirements, we tailor the most economical and reliable protection and control panel solution for clients to avoid technical risks and resource waste.

Efficient After-Sales Operation & Maintenance Guarantee

We have a professional localized after-sales service team and sufficient spare parts inventory.
Available services include on-site technical training, regular equipment inspection, daily fault troubleshooting, protection setting review, and system software upgrade.
For on-site emergency faults, we implement a 24-hour remote response and 48-hour on-site arrival service mechanism, minimizing power outage losses and project operation risks for clients.

Low-Cost Intelligent Upgrade Service for Old Equipment

We provide targeted intelligent upgrading for long-serving traditional protection panels. Original cabinets are retained to reduce costs; legacy electromagnetic and early microcomputer protection equipment is upgraded to modern digital intelligent relays for economical system intelligence renewal.

What kinds of power system cabinets can we manufacture?

Various types of protection and control panels are adopted in engineering practice, which are summarized as follows:

Panel Name Function Description
Bus Differential Protection Panel It trips within milliseconds for internal bus faults and reliably blocks operation under external faults to prevent large-scale power outages, applicable to 11kV ~ 110kV busbars.
Transformer Protection & Control Panel It integrates electrical and non-electrical protections to provide full-range protection and measurement for main transformers, ensuring safe and stable equipment operation.
Fault Recorder Panel It automatically records fault waveforms and outputs files in standard formats, supplying accurate data for fault analysis and protection performance verification.
Generator Excitation Panel It outputs adjustable excitation current and integrates AVR and PSS to maintain constant terminal voltage and guarantee the transient stability of generating units.
Generator Protection & Control Panel It is equipped with complete ANSI-standard protective functions together with electrical measurement and control modules to comprehensively secure the operation of generator sets.
Generator Synchronizing Panel It automatically checks synchronizing conditions and supports dual manual/automatic modes to realize smooth, shock-free grid connection of generators.
Metering Panel It conducts high-precision measurement of active and reactive power energy, supports time-of-use tariff metering and remote data transmission, and serves as the legal basis for electricity settlement.
PLC Control Panel It executes sequence control for switches and auxiliary equipment in accordance with preset logic with high reliability, suitable for substation automation scenarios.
Common Measurement & Control Panel It centrally collects all station-wide common electrical and non-electrical data and uploads data to SCADA systems to improve the operation and maintenance efficiency of auxiliary equipment.
RTU Communication Panel It aggregates operational data of all on-site equipment, supports mainstream power communication protocols for remote transmission, and realizes the four remote functions for dispatch centers: remote measuring, remote signaling, remote control and remote regulation.
Line Protection & Control Panel It integrates main and backup protections with real-time measurement and switching control, enabling fast isolation of faults on transmission and distribution lines.
Power SCADA Monitoring Panel It graphically displays power grid primary topology and operational parameters, integrating real-time monitoring, fault alarming and remote control into one integrated unit.

On-site Actual Operation of Protection and Control Panels

Protection and control panels

Selection Guidelines for Protection & Control Panels

Confirm System Voltage Level and Equipment Type

Clarify the voltage level of the power system (11kV to 110kV as the mainstream range) and core primary equipment under protection, including busbars, transformers, generators, transmission lines and more. Specialized protection panels shall be configured for different types of primary equipment.

Match Standard Protection Functions

Based on operational risks of equipment, select panels integrated with full ANSI standard protection logics, such as differential protection, overcurrent protection, earth fault protection and reverse power protection, to realize rapid fault isolation.

Comply with Project-Specific Technical Requirements

There are no universal fixed standards for the internal layout, signal interfaces and communication protocols of panels.
All configuration schemes shall be implemented in strict accordance with the bidding documents and technical specifications of the corresponding power plant or substation project.
What are the common types of protection and control panels?

Common types include bus, transformer, line and generator protection & control panels, as well as excitation, synchronizing, fault recording, metering, PLC, common measurement & control, RTU communication and SCADA monitoring panels.

Protection and Control Panels Inquiry

Fill in the form below to get detailed technical parameters, factory direct quotations, drawing support, on-site installation guidance and fully customized solutions for all types of power secondary protection and control panels. Our professional electrical engineer team will contact you within 24 hours to answer your technical questions and provide one-stop power system secondary equipment solutions.
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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.