1. Scope of application
SS-71.72.73 series time relay (hereinafter referred to as relay) is a delay control component used in power system relay protection and automation devices.



3. Main technical data

Rated voltage: DC 220V, IIOV, 48V.
Operating voltage: not exceeding 65% of the rated voltage.
Return voltage: not less than 50% of the rated voltage.
Rated white holding current: DC 0.25A, 0.5A, lA, 2A.
Self holding current: not exceeding 80% of the rated self holding current.
Return time: no more than 20ms.
Delay error: not greater than 0.1% of the set value plus 2ms.
Power consumption: not exceeding 9W.
Contact capacity: For a vertical inductive load with a voltage not exceeding 250V, current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W in the circuit. Under the specified load conditions, the product can reliably operate and return 5x104. The output contact is allowed to be connected for a long time with a current of 5A
Dielectric strength: When the conductive terminals of the product are connected together, it can withstand a 2000V (effective) 50HZ AC voltage for 1 minute without insulation breakdown or flashover between exposed non charged metal parts or shells

4. Internal wiring

SS-71, 72,73 series time relay