Time Delay Relays

Precision electronic timing relays for power-system and industrial control circuits, providing configurable delay logic, robust anti-interference capability, and reliable contact outputs for breaker, motor, interlocking, sequencing, alarm, and protection-support applications.

Product Capability

A power-grade timing-control family built around the STR platform, combining adjustable time logic, compact relay construction, direct local setting, and robust EMC performance for critical control and auxiliary circuits.

Multiple timing logics: ODES time-relay materials cover power-on delay, power-off delay, pulse extension, and cyclic / sequence-delay functions, allowing timing behavior to be matched to different control tasks.
Breaker and switchgear timing: STR-F relays are used in applications such as energy-storage motor timing, disconnector / earthing-switch motor run-time supervision, and three-phase pole-discordance delay logic.
Anti-interference timing: the STR-F1 high-burden configuration uses increased starting / pickup power and power-grade EMC design to reduce the risk of unintended operation in electrically noisy or long-cable control circuits.
Direct local setting: current STR-F product configurations use front-mounted rotary / coded switches, allowing timing values to be set and checked directly during panel assembly, FAT, commissioning, and maintenance.
Power-system environmental capability: ODES STR-series application materials specify operation from -25 °C to +70 °C, altitude capability up to 4500 m, and Level IV EMC immunity for demanding substation and switchgear environments.
Flexible circuit integration: multiple timing, supply, trigger, and contact configurations allow the relay to be applied in new designs, original-drawing continuation projects, retrofit work, and spare-part replacement.

Customer Value

Adds deterministic timing to control circuits while reducing nuisance operation, commissioning ambiguity, and the need for custom timing logic.

Add deterministic timing to control and auxiliary circuits so that switching, interlocking, alarm, and protection-support actions occur only after the required time condition is satisfied.
Reduce nuisance operation caused by transient signals and electromagnetic disturbance by combining intentional timing logic with power-system anti-interference design.
Simplify cabinet engineering by replacing project-specific timing circuits with compact, repeatable relay modules that can be standardized across panel families.
Accelerate FAT and field commissioning through direct front-panel setting and clear model-based timing configuration, without requiring a programming tool for conventional STR-F applications.
Support retrofit and spare-part strategies by providing dedicated STR configurations for established breaker, GIS/LCC, motor-control, and auxiliary-control circuits.
Improve long-term maintainability by separating timing logic from higher-level protection or automation devices, making the delay element easier to test, replace, and verify independently.

Product Series

Product series are configured according to users' usage and configuration preferences.

STR-F1 Series

STR-F1 family; ODES application references include STR-F1-4 and STR-F1-5

High-burden / anti-interference STR time-relay family for critical power-system timing. ODES application materials identify STR-F1-4 for energy-storage motor timing and STR-F1-5 for three-phase pole-discordance timing, with increased pickup / starting power for improved immunity in demanding control circuits.

STR-F2 Series

STR-F2 family; current product-page configuration includes STR-F2-6

Configurable STR timing family for conventional power and industrial control delay tasks. It shares the compact front-setting concept of the STR platform; the exact timing mode, time range, rated supply, burden characteristic, and contact arrangement are defined by the selected suffix.

STR-F3 Series

STR-F3 family

Separate STR timing configuration shown on the current ODES product page for project-specific delay-control requirements. Selection should be based on the required timing mode, range, supply, trigger logic, and output-contact configuration.

STR-P Series

STR-P family

STR timing configuration intended for applications where the timing action is initiated by a control / switching input. It supports separation of the timing trigger from the main circuit logic; exact trigger, delay, supply, and contact details are model / suffix dependent.

View technical parameters by product series.

STR-F2 Series - Configurable Time Delay Relays

Parameter(STR-F2)	Data(STR-F2)	Remarks(STR-F2)
Timing capability	Configurable delay logic; exact mode is suffix dependent	Confirm on-delay / off-delay / pulse / other required logic in the latest model manual.
Representative current-page configuration	STR-F2-6	Model marking visible on the current ODES Time Delay Relays product page.
Setting method	Front rotary / coded switches	Direct setting supports panel assembly, FAT, commissioning, and maintenance.
Burden / pickup characteristic	Model / suffix dependent	Where a >5 W high-burden requirement is specified, STR-F1 should be evaluated as the dedicated high-burden option.
EMC capability	Power-system anti-interference design; Level IV referenced for the STR family	Confirm the exact certificate / test scope for the selected STR-F2 suffix.
Operating environment	-25 °C to +70 °C; altitude up to 4500 m in STR-series application materials	Verify project derating or special environmental requirements where applicable.
Rated supply and output contacts	Multiple configurations; model / suffix dependent	Confirm rated supply, contact form, contact duty, and terminal assignment.
Typical applications	Sequence timing, motor-control timing, auxiliary control, interlocking and alarm delay	Use the actual circuit function to determine the required suffix.
Final selection data	Timing mode; time range; rated supply; contact arrangement; burden / EMC requirement	Freeze these items against the latest instruction manual before ordering or website publication.
Product type	Electronic time delay relay - STR-F2 configuration	For conventional timing functions in power-system and industrial control circuits.

STR-F3 Series - Project-Specific Time Delay Relays

Parameter(STR-F3)	Data(STR-F3)	Remarks(STR-F3)
Timing capability	Model / suffix dependent	Select according to the required timing sequence and control-circuit logic.
Setting method	Front rotary setting	Current product image shows direct local adjustment; exact scale / resolution must be confirmed by suffix.
Rated supply	Multiple project-specific versions	Confirm AC / DC type and rated voltage from the exact ordering code.
Output contacts	Relay contact output; model / suffix dependent	Contact form, quantity, rating, and timed / instantaneous behavior must be confirmed by model.
Operating temperature	-25 °C to +70 °C for the STR-series application platform	Confirm exact suffix and any project-specific derating requirement.
Altitude	Up to 4500 m for the STR-series application platform	Current ODES STR-series application value.
EMC capability	Level IV referenced for ODES STR-series application	Verify exact test standard and product coverage for the selected suffix.
Typical applications	Power-system and industrial auxiliary timing; project-specific sequence / interlock delay	Use when the selected STR-F3 logic and contact arrangement match the control schematic.
Final selection data	Timing logic; delay range; supply; contacts; EMC; terminal map	Confirm all contractual numeric values against the latest instruction manual.
Product type	Electronic time delay relay - STR-F3 configuration	A separate STR-family timing configuration shown on the current ODES product page.

STR-P Series - Signal-Input Time Delay Relays

Parameter(STR-P)	Data(STR-P)	Remarks(STR-P)
Trigger concept	External switching / control-signal input	Useful when the timing trigger needs to be functionally separated from the auxiliary supply or main control path.
Timing capability	Model / suffix dependent	Confirm whether the selected version performs on-delay, pulse / interval, off-delay, or another specified timing function.
Representative family	STR-P	Displayed as a separate product configuration on the current ODES Time Delay Relays page.
Setting method	Front local setting; model dependent	Confirm the actual time-range selector and adjustment method for the ordered suffix.
Rated supply	Multiple AC / DC configurations	Supply voltage is defined by the exact ordering code.
Output contacts	Relay contact output; model / suffix dependent	Confirm contact form, quantity, rating, and terminal assignment before final selection.
Operating temperature	-25 °C to +70 °C for the STR-series application platform	Current ODES STR-series application value.
Altitude	Up to 4500 m for the STR-series application platform	Current ODES STR-series application value.
EMC capability	Power-system anti-interference design; Level IV referenced for the STR family	Confirm exact certificate / test scope for the selected STR-P model.
Typical applications	Signal-triggered timing, auxiliary interlocking, alarm delay, sequence control, and retrofit timing logic	Final function depends on the selected suffix and project schematic.
Product type	Electronic time delay relay - STR-P configuration	For timing initiated by a dedicated control / switching input.

STR-F1 Series - High-Burden / Anti-Interference Time Relays

Parameter(STR-F1)	Data(STR-F1)	Remarks(STR-F1)
Timing capability	Configurable STR-family delay logic	ODES STR materials cover power-on delay, power-off delay, pulse extension, and other timing functions; the exact STR-F1 function is suffix dependent.
Representative application models	STR-F1-4 / STR-F1-5	ODES company application materials identify STR-F1-4 for energy-storage motor timing and STR-F1-5 for three-phase pole-discordance timing.
Setting method	Front rotary / coded switches	Allows direct local adjustment; exact time range, multiplier, and resolution depend on the model suffix.
Starting / pickup power	>5 W for the STR-F1 high-burden configuration	ODES application material highlights this characteristic to improve anti-interference performance.
EMC capability	Level IV immunity; EN 61000-4-2 / -4-4 / -4-5 referenced in ODES materials	Confirm the exact test report / certificate scope for the ordered suffix.
Operating temperature	-25 °C to +70 °C	Current ODES STR-series application value.
Altitude	Up to 4500 m	Current ODES STR-series application value.
Rated supply	Multiple AC / DC versions	Rated voltage is defined by the model suffix and project control-power system.
Output contacts	Relay contact output; model / suffix dependent	Confirm contact form, quantity, continuous current, making / breaking duty, and terminal assignment before ordering.
Typical applications	Energy-storage motor timing; pole-discordance delay; HV/MV breaker and GIS/LCC auxiliary control	Select the exact suffix according to the circuit schematic and required delay logic.
Product type	Electronic time delay relay - high-burden / anti-interference configuration	For critical power-system auxiliary and control circuits requiring reliable timing and higher immunity to coupled interference.

Resources & FAQ

Datatype - Download
Product Catalog
Installation Drawing
Datasheet
Wiring Diagram
Product Certification Report

Frequently Asked Questions

Q1. How do I choose between STR-F1, STR-F2, STR-F3, and STR-P?

Start with the circuit function and trigger method. Select STR-F1 when the project specifically requires the high-burden / anti-interference configuration or when an existing design already specifies STR-F1. Select STR-F2 or STR-F3 according to the required timing mode, supply, time range, and contact arrangement stated by the exact suffix. Select STR-P when the application requires a timing relay configuration triggered by a separate control / switching signal. The final choice should be checked against the latest instruction manual and project schematic.

Q2. What information is required before ordering a time delay relay?

Confirm the required timing function (for example on-delay, off-delay, pulse / interval, or cyclic logic), delay range and setting resolution, rated control / auxiliary supply, trigger method, required contact arrangement and contact duty, high-burden requirement, EMC requirement, operating environment, installation method, and the exact circuit application. For replacement projects, also provide the existing model and wiring diagram.

Q3. When should a high-burden time relay be considered?

A high-burden configuration is useful where long control cables, distributed capacitance, or other coupled interference may create unwanted voltage or energy in the relay circuit. Increasing the pickup / starting power helps the relay remain stable under such disturbance. ODES application materials identify STR-F1 as the high-burden option with starting power greater than 5 W; coordination with the actual control circuit and project specification should still be verified before selection.

The current ODES Time Delay Relays product page presents four STR-family product configurations: STR-F1, STR-F2, STR-F3, and STR-P. ODES application materials also reference a WS digital-display time-relay family, but it is not treated as a current product-page series in this draft. Numeric values below are included only where they are stated in current ODES website or company application materials. Before website release, project approval, or ordering, verify the exact model suffix, timing function and range, rated supply, trigger logic, contact arrangement and rating, burden requirement, EMC certificate scope, dimensions, and terminal assignment against the latest instruction manual and project specification.