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For relay protection, circuit breaker operation, and power automation systems, explore ODES product modules by secondary-circuit function.
Product Portfolio
Find the Right Product Series by Circuit Function
Covers applications including test isolation, tripping and lockout, circuit supervision, fault annunciation, signal expansion, measurement and monitoring, synchronizing control, cabinet climate control, power supply, and signal conversion.
Testblock
Designed for testing, isolation, and safe maintenance of relay protection secondary circuits, enabling safe handling of CT/PT, trip, signal, and control circuits during commissioning, routine inspection, and maintenance.
Circuit Tasks
CT/PT Testing and Isolation
Trip Circuit Isolation
Safe Maintenance and Servicing
Protective Relay Commissioning, Periodic Testing, and Secondary Circuit Maintenance
Trip Relays
Designed for high- and medium-voltage circuit breaker tripping applications, with core capabilities including high-speed operation and multiple contact outputs, and available in a high-burden version.
Circuit Tasks
Circuit Breaker Tripping
High-Speed Operation
Multiple Contact Outputs
Protection Panels, Circuit Breaker Control Circuits, and Medium- and High-Voltage Switchgear
Trip and Lockout Relays
Designed for applications requiring maintained lockout after tripping, this bistable/latching relay is available in High Burden and relay-coil supervision versions.
Circuit Tasks
Trip Lockout
Bistable Latching
Coil Supervision
Protection Trip Circuits, Fault Lockout Circuits, and Critical Equipment Interlocking Circuits
Trip Circuit Supervision Relays
Used to supervise the continuity of the circuit breaker trip circuit, ensuring that it remains available when tripping is required.
Circuit Tasks
Trip Circuit Continuity Supervision
Open-Circuit Alarm
Trip Availability Verification
Substation Protection Panels, Circuit Breaker Trip Circuits, and Protection Output Circuits
Auxiliary Supply Circuit Supervision Relays
Used to supervise auxiliary power supplies for protection devices or trip circuits, reducing the risk of nuisance alarms caused by transient voltage dips.
Circuit Tasks
Auxiliary Power Supply Supervision
Undervoltage Detection
Nuisance Alarm Suppression
Protection, Trip, and Control Power Supply Circuits
Fault Annunciator
Used for abnormal signal acquisition, status indication, audible and visual alarms, and remote signal output, enabling operation and maintenance personnel to quickly identify faults.
Circuit Tasks
Abnormal Signal Acquisition
Audible and Visual Alarm
Remote Signal Output
Substation Alarm Panels, Protection and Control Cabinets, and Industrial Power Systems
Auxiliary Relays
Used for signal isolation, contact multiplication, and control interfacing, ensuring reliable signal conversion between protection devices, control equipment, and actuating circuits.
Circuit Tasks
Signal Isolation
Contact Multiplication
​Multiple Circuit Outputs
​Protection Device Interfaces, Control Equipment Interfaces, and Field Actuating Circuits
Measuring Relays / Supervision Relays
Used to monitor electrical parameters including voltage, current, frequency, phase sequence, phase loss, and phase unbalance, and to provide alarm, interlock, or control outputs.
Circuit Tasks
Voltage Supervision
​Current Supervision
​Frequency, Phase Sequence, and Phase-Loss Supervision
​Protection Panels, Switchgear, Control Cabinets, and Industrial Power Systems
Manual Synchronizing Module Series
Used in manual synchronizing circuits for generators, bus-tie circuit breakers, grid-connection circuit breakers, and marine and industrial power systems.
Circuit Tasks
​Synchronizing Signal Interface
​Closing Permissive
​Synchronizing Interlock
​Generator Grid Connection, Bus-Tie Circuit Breakers, and Marine and Industrial Power Systems
Temperature and Humidity Controller
Used to control temperature, humidity, and condensation risks inside electrical cabinets by automatically operating heating, ventilation, or dehumidification equipment, thereby reducing the risks of moisture, condensation, insulation degradation, and secondary-circuit faults.
Circuit Tasks
Temperature and Humidity Monitoring
​Condensation Risk Control
Heating, Ventilation, and Dehumidification Control
​Switchgear, Ring Main Units, Terminal Boxes, and Outdoor Control Cabinets
Dual-Busbar Voltage Switching Module
Used in dual-busbar PT secondary voltage circuits to provide reliable switching between the Busbar I and Busbar II voltage sources, ensuring correct secondary voltage inputs for protection, control and monitoring, metering, synchronizing, and automation devices.
Circuit Tasks
​PT Secondary Voltage Switching
Busbar Voltage Selection
Voltage Inputs for Protection, Measurement, and Control
Dual-Busbar Substations and Protection, Measurement and Control, Metering, Synchronizing, and Automation Devices
Time Relay
Used for time-delay control in power-system secondary and control circuits, reducing the risk of unintended operation caused by transient signals and contact bounce.
Circuit Tasks
On-Delay
Off-Delay
Pulse and Interval Delay
Protection and Control Circuits, Switchgear Control Circuits, and Industrial Control Cabinets
DIN-Rail-Mounted Switching Power Supply
Power conversion and reliable power supply modules for power-system secondary circuits, circuit breaker operating circuits, and in-cabinet auxiliary equipment.
Circuit Tasks
Power Conversion
Power Supply for Auxiliary Equipment
Control Power Supply Support
Protection and Control Cabinets, Circuit Breaker Operating Circuits, and In-Cabinet Auxiliary Equipment
Disconnector Motor Controller
Used in motor-operated mechanisms for disconnectors and earthing switches in medium- and high-voltage switchgear, GIS, and substations.
Circuit Tasks
​Opening and Closing Control
​Forward/Reverse Control
Electrical Interlocking
Disconnectors, Earthing Switches, and Motor-Operated Mechanisms
Isolated Signal Transmitter Module
Used in power-system secondary circuits, control cabinets, PLC/DCS systems, and industrial automation data acquisition applications to provide signal isolation, conversion, and interference-resistant transmission.
Circuit Tasks
Electrical Measurement Signal Conversion
Non-Electrical Signal Conversion
Isolated, Interference-Resistant Signal Transmission
​PLC/DCS Data Acquisition, Power Monitoring, and Industrial Automation Systems
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