top of page
Secondary-Circuit Modules for Protective Relaying, Circuit-Breaker Control, and Power-System Automation
ODES serves primary equipment manufacturers, secondary equipment manufacturers, and power system operation and maintenance providers worldwide. Addressing key applications such as TestBlock systems, circuit-breaker control, measurement, supervision, fault data acquisition, and power supply, ODES delivers modular products designed for seamless integration, straightforward product selection, and reliable project delivery.
Secondary Circuit Expertise
High-Reliability Modular Products
High Quality and Fast Delivery
What ODES Does
Secondary-circuit modules for protective relaying, circuit-breaker control, and power system automation
Customers We Serve
Primary equipment manufacturers, secondary equipment manufacturers, and power system operation and maintenance customers
Market Positioning
An application-driven supplier of modular control components and solutions
Secondary-Circuit Capabilities
TestBlock, circuit-breaker control, measurement, supervision, fault information acquisition, and power supply
Product Offering
High-reliability auxiliary relays and modular solutions
POWER SYSTEM APPLICATIONS
Power System Equipment
Modular integration applications for power system control panels, switchgear, transformers, and power distribution control systems.
01
POWER SYSTEM EQUIPMENT
Protection, Control & Automation Panels
For secondary-circuit tasks in protective relaying, circuit-breaker operation, and power-system automation, provide integrable test, control, supervision, alarm, power-supply, and signal-interface modules.
Integration Point
The secondary compartment of medium-voltage switchgear and its protection, metering, control, interlocking, and testing areas.
02
POWER SYSTEM EQUIPMENT
High-Voltage Switchgear Control & Monitoring
For high-voltage switchgear opening and closing operations, mechanism status, energy storage, auxiliary supplies, environmental conditions, and fault signals, provide local control and supervision modules.
Integration Point
LCCs, mechanism boxes, control boxes, or centralized control cabinets adjacent to GIS, AIS, high-voltage circuit breakers, or disconnectors.
03
POWER SYSTEM EQUIPMENT
Power Transformer Auxiliary Control & Cooling
ODES provides modular control, monitoring and auxiliary protection components for power transformer auxiliary and cooling systems.
Integration Point
Auxiliary control boxes, air-cooling control boxes, or auxiliary control cabinets adjacent to power transformers.
04
POWER SYSTEM EQUIPMENT
Medium-Voltage Switchgear Integration
In assemblies where primary and secondary equipment share the same cabinet, support protection testing, measurement and supervision, operating control, fault alarms, control power, and in-cabinet environmental management.
Integration Point
The secondary compartment of medium-voltage switchgear and its protection, metering, control, interlocking, and testing areas.
05
POWER SYSTEM EQUIPMENT
Low-Voltage Distribution & Control
For distribution branches, power distribution, feeder, and motor circuits, provide distribution supervision, auxiliary control, fault alarms, and in-cabinet environmental components.
Integration Point
Low-voltage distribution boards, low-voltage switchgear, MCCs, and their associated distribution and motor circuits.
Industrial Automation Applications
Industrial Automation
High-reliability control, supervision, isolation, and alarm applications for mission-critical industrial control panels.
06
High-Reliability Components for Critical Industrial Control Panels
Industrial Automation and Critical Control Panels
ODES extends its proven control and monitoring capabilities from demanding power-system applications to critical industrial control panels where reliability, environmental robustness and maintainability matter.
Integration Point
Machine control cabinets, process equipment control cabinets, PLC/DCS system control cabinets, and remote I/O and signal interface cabinets.
Product Portfolio
Build Typical Secondary Circuits Through Modular Combinations.
ODES core modules cover high-frequency applications such as protection test isolation, circuit-breaker tripping and lockout, trip circuit supervision, fault alarms, and manual synchronizing, helping customers quickly match requirements for protection panels, control panels, switchgear, substations, and industrial power projects.
Testblock
For testing, isolation, and safe maintenance of protection secondary circuits, enabling safe handling of CT/PT, trip, signal, and control circuits during commissioning, periodic testing, and maintenance.
Trip Relays
For high-voltage / medium-voltage circuit-breaker tripping applications, providing high-speed operation and multiple contact outputs, with High Burden versions available.
Trip and Lockout Relays
For applications requiring lockout retention after tripping; a bistable / lockout relay available in High Burden and relay-coil supervision versions.
Trip Circuit Supervision Relays
Used to supervise the integrity of circuit-breaker trip circuits, ensuring the trip circuit is available when a trip is actually required.
Fault Annunciator
Used for abnormal signal acquisition, status indication, audible and visual alarms, and remote outputs, helping O&M personnel identify faults quickly.
Manual Synchronizing Module Series
For manual synchronizing circuits in generators, bus couplers, grid-connection breakers, and marine / industrial power systems.
More Product Series
Auxiliary Supply Circuit Supervision Relays, Temperature and Humidity Controllers, Dual-Bus Voltage Transfer Modules, Auxiliary Relays, Measuring / Monitoring Relays, Time Delay Relays, DIN-Rail Power Supplies, Disconnector Motor Controllers, Signal Isolators, and other products are available in the Product Center.
Application
Application-Driven Solutions
01
TestBlock
During commissioning, periodic testing, and maintenance, CT/PT, trip, signal, and control circuits must be handled safely.
Circuit Tasks
CT/PT Test Isolation
Trip Circuit Isolation
Safe Maintenance
Applicable Modules
TSBA serialT
TSBE serial
02
Fast trip and Lockout
Protection trip outputs require high-speed operation and multiple contact outputs, with lockout maintained after faults or critical operations.
Circuit Tasks
High-Speed Tripping
Multiple Contact Outputs
Lockout Latching
Manual Reset
Applicable Modules
GRUS-11H serial
GRUS-11TA serial
03
Trip Circuit Supervision
Customers need to verify that trip circuits will operate when required, avoiding hidden open circuits or false healthy indications.
Circuit Tasks
Trip Circuit Continuity Supervision
Open-Circuit Alarm
Coil Circuit Availability Verification
Applicable Modules
GRUS-TCS serial
04
Fault Information Acquisition, Display, Expansion and Communication
On-site abnormal signals require centralized acquisition, status display, audible and visual alarms, contact expansion, and communication outputs to help O&M personnel identify faults quickly.
Circuit Tasks
Abnormal Signal Acquisition
Status Indication
Audible and Visual Alarm
Expansion and Communication
Applicable Modules
SAD serial
05
Auxiliary Supply Circuit Supervision
Protection equipment, trip circuits, and control power supplies require continuous auxiliary-supply supervision to reduce the risk of false alarms or functional failure caused by momentary voltage dips or supply abnormalities.
Circuit Tasks
Auxiliary Supply Supervision
Voltage-Dip Detection
Time-Delayed Alarm
Control Power Supply Status Verification
Applicable Modules
GRUS-RTU serial
USR serial
06
Control Cabinet Climate Control
Temperature, humidity, and condensation risks inside control panels and switchgear must be continuously managed to prevent insulation degradation, terminal corrosion, and secondary-circuit failures.
Circuit Tasks
Temperature and Humidity Monitoring
Heating / Ventilation Control
Condensation Risk Control
In-Cabinet Environmental Alarm
Applicable Modules
TH-E serial
Why Choose ODES
From Secondary-Circuit Requirements to Deliverable Products.
01
Engineered for Real-World Secondary-Circuit Applications
For typical tasks including tripping, lockout, circuit supervision, test isolation, alarms, power supply, and signal isolation, supporting applications in protection panels, switchgear, control panels, substations, and industrial power projects.
Tripping
Circuit Supervision
Fault Alarm
Lockout
Test Isolation
Signal Isolation
02
Support for International Certifications and Project Documentation
Provide CE, cUL, test reports, product documentation, and compliance documents by product series and project requirements to support export projects, equipment integration, and tender reviews.
CE
Compliance Documents
Test Reports
cUL
Product Documentation
Project Review
Serving primary equipment manufacturers, secondary equipment manufacturers, and power system O&M customers, ODES starts from real-world secondary-circuit applications and connects customer circuit tasks, engineering pain points, certification documentation, selection software, and stable manufacturing to reduce selection risk, shorten confirmation cycles, and improve project delivery efficiency.
03
Fast Selection and Complete Model-Number Generation
Provide selection software for major product series, allowing customers to generate complete model numbers based on voltage, contacts, functional variant, mounting method, and application, reducing selection errors and repeated confirmation.
Selection Software
Mounting Method
Functional Variant
Voltage Selection
Contact Configuration
Complete Model Number
04
Consistent Quality and Fast Delivery
Through a modular product platform, standardized materials, process control, automated testing, and flexible manufacturing, improve product consistency, delivery speed, and project responsiveness.
Flexible Manufacturing
Process Control
Rapid Response
Standardized Materials
Automated Testing
Modular Platform
Certifications and International Project Experience
Certification, Project Experience and Compliance Documentation Support.
International Certification Support
CE / cUL and Other Project Qualification Documents
For export projects, OEM integration, and engineering tenders, provide certification, testing, and compliance document support based on product series and project requirements.
International Market Applications
Multi-Region Power Project Coverage
Serving transmission and distribution, industrial power, renewable energy, and infrastructure projects across the Americas, Middle East, Africa, Central Asia, and Southeast Asia.
Project Track Record and Supply Experience
Support for Primary and Secondary Equipment Integration Projects
Provide modular products and project adaptation documentation for primary equipment, protection and automation equipment, secondary panels, and O&M scenarios.
ODES provides secondary-circuit modules for protective relaying, circuit-breaker operation, and power-system automation in international power markets, with support for CE, cUL, and other certification, testing, and compliance documentation by product series and project requirements.
Global Customers
Serving primary equipment manufacturers, secondary equipment manufacturers, and power system operation and maintenance customers.
In new projects, ODES products typically enter power plants, substations, industrial power, renewable-energy, and infrastructure projects through primary and secondary equipment manufacturers. Utilities and O&M customers also contact ODES directly for spare parts, replacement maintenance, and retrofit needs.
Primary Equipment Manufacturers
Manufacturers of transformers, circuit breakers, disconnectors, GIS, switchgear, and complete equipment
Configure reliable secondary-circuit control, supervision, alarm, test-isolation, and operating-interface modules in primary equipment and complete equipment solutions.
Secondary Equipment Manufacturers
Manufacturers of protection relays, measurement and control devices, automation systems, protection panels, and control systems
For protection, measurement and control, automation, and secondary panel integration, configure highly consistent auxiliary control, interface, isolation, alarm, and automation modules.
Power System O&M Customers
Power transmission and distribution companies, regional grid operators, power plants, substations, and industrial power O&M organizations
For spare parts, replacement maintenance, retrofit projects, and operational issue resolution, focus on model matching, supply stability, and secondary-circuit reliability.
Market Regions
International Markets Currently Served
The Americas
Coverage Across South America, North America and Canada
Middle East
Power Grid, Infrastructure and Industrial Power Projects
Africa
Power Grid, Substation and Industrial Power Applications
Southeast Asia
Utilities, EPCs, OEMs and Infrastructure Projects
Project Ecosystem
Project supply-chain experience with global power equipment ecosystems
ODES products are used in project supply chains involving global and regional power equipment manufacturers, protection and automation equipment manufacturers, and project integration ecosystems. This description indicates project ecosystem experience and do not imply official endorsement or authorized partnership.
Global & Regional Equipment Ecosystem
Primary equipment manufacturers
Secondary equipment manufacturers
Protection, Automation & Project Ecosystem
Protection and automation manufacturers
Panel and switchgear buildersS
System integrators and EPC project stakeholders
Quote & Support
Submit Model Numbers, Selection Results or Project Requirements.
Customers can submit model numbers, BOMs, RFQs, technical specifications, nameplate photos, or selection results directly. Complete engineering drawings are not required; ODES will follow up to confirm requirements.
Email : tonyzhang@odes-electric.com
R&D Center: 13th Floor, Building A, Xincheng Headquarters Tower, No. 13 Pukou Avenue, Pukou District, Nanjing, Jiangsu Province, China
Factory: No. 34 Zifeng Road, Pokou District, Nanjing City, Jiangsu Province
bottom of page