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FIIG:  T130-H

Entry Date:  Apr-01-1974

Concept:  

Status:  A

Applicability:  HA

Type:  0

Definition:  An item having a moving plunger type core which travels parallel to the longitudinal axis of the coil(s), and which is primarily designed to perform the dual function of closing the circuit of a STARTER, ENGINE, ELECTRICAL and actuating the starter engaging mechanism. It must have provisions for attaching the mechanical linkage for actuating the engaging mechanism if the linkage is not included. May have provisions for manual actuation. Without contacts this item is known as a SOLENOID, ELECTRICAL. Without provisions for attaching mechanical linkage this item is known as a RELAY, ELECTROMAGNETIC. See also SWITCH, ENGINE STARTER, ELECTRICAL.

Basic INC:  70595

Basic Name:  RELAY

Description:  1. (Electrical) A protective or control device which completes or breaks an electrical circuit in response to electrical changes in an external circuit. The contacts and actuating element are not in series. It is not designed to permit manual opening of the protected or controlled circuit but may have facilities for manual closing or reset upon automatic opening of the circuit. It is classified by the type of contact actuation, such as armature, meter movement, motor driven, rotary, and solenoid rather than by its application. Such uses as time delay, antenna switching, and keying are secondary features since, for example, a time-delay relay may be of the armature, motor driven, solenoid, or thermal type. MOTOR-DRIVEN SWITCHES, PHOTOELECTRIC TUBES, AND ELECTRON TUBES WHICH MAY FUNCTION AS SWITCHING DEVICES ARE NOT CONSIDERED AS RELAYS. For items with provisions for manual operation, see RELAY-SWITCH. For items in which the contacts and actuating elements are in series, see CIRCUIT BREAKER. See also REGULATOR, VOLTAGE; REGULATOR, CURRENT; SWITCH (as modified); and TIMER, SEQUENTIAL.