1. Scope of application

The SS-21A time relay (hereinafter referred to as the relay) can be used in various relay protection and automatic control circuits with high delay accuracy within the delay range of 0.01-99s.

2. Main technical data

Operating voltage: not exceeding 70% of the rated voltage.
Return voltage: not less than 5% of the rated value.
Setting error: less than 1% of the maximum setting value plus 0.050s.
Delay consistency: not greater than 0.2% maximum setting value+0.050s.
Power consumption: not exceeding 5.5W.
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the breaking capacity of the output contact of the product is 50W. The output contact can reliably operate and return 5 x 104 times under the specified load conditions. The long-term allowable current for the output contact is 5A.
Dielectric strength: When the conductive terminals of the product are connected together, they can withstand a test of 2000V (effective value) 50Hz AC power for 1 minute without insulation breakdown or flashover between exposed non charged metal parts or shells.  

3. Internal wiring

SS-21A type time relay