Technical Specifications Adjustable time‑delay range. Drive input signal 24‑250 V DC. Relay contact rated 250 V AC / 5 A resistive load. Auxiliary power supply 24‑250 V DC. Typical power consumption 4.5 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP30, rear connector area IP20. Complies with CE and IEC time‑delay relay standards.
Functional Features Receives external drive binary signal. Realizes adjustable time‑delay logic processing. Drives electromagnetic relay to output dry‑contact signal after timing completes. Front‑panel LED indicators show drive input status and relay action status. Timing parameter can be adjusted on‑site.
Application Scenarios Mounted in substation protection relay rack. Used for time‑delay logic implementation in protection interlock, alarm and auxiliary control loop. Suitable for old substation renovation and spare‑part replacement projects.
Performance Parameters Time‑delay precision meets secondary protection loop requirement. Relay mechanical service life reaches 10000000 operations. Contact switching capacity satisfies secondary circuit load requirement. Power‑supply abnormality triggers LED prompt.
Working Principle After power‑on, module completes power‑supply self‑check. When external drive signal arrives, timing circuit starts countdown according to preset parameter. After time‑delay finishes, internal electromagnetic relay pulls‑in, dry‑contact outputs control signal to external secondary loop.
Installation Requirements Insert module into standard relay rack slot and lock fastening screw. Connect auxiliary power supply within rated voltage range. Complete external drive and contact loop wiring strictly following engineering drawing. Adjust time‑delay knob to required setting value. Guarantee reliable rack protective grounding. Check LED indication after power‑on.
Usage Notes Take anti‑static measures before module operation. Hot‑plug under powered condition is forbidden. Do not adjust timing knob under violent vibration environment. Periodically check terminal tightening status and relay contact burning condition. Avoid dust and corrosive gas environment. Verify time‑delay parameter in maintenance cycle.
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