VTT12 relay equivalent, definite time delay relay.
* Consistent accuracy
* Reliability
* Low burden
* Reduced maintenance
* Immunity to transients and surges;
withstands 5 kv impulse voltage .
requiring large number of operations and consistent accuracy with little or no maintenance over long periods. It is also.
A stabilised voltage is applied to a resistance/capacitance circuit. The potential developed across the capacitor is applied to a transistor switching circuit which, in turn, operates an attracted armature relay when the potential reaches the trigger.
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