21N4 - 00762 24V Relay Timer R150-7 Earthmover Spare Parts Electrically Operated Switch

21N4 - 00762 Excavator Control Panel 24V Relay Timer R150 - 7 Excavator Spare Parts
 
 
Specifiions

Description
 

A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.

Relays are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal. Relays were first used in long-distance telegraph circuits as signal repeaters: they refresh the signal coming in from one circuit by transmitting it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.

Characteristic

1.Safe and environmental protection, strong and durable
2.long term availability (no obsolescence)

3.Relay causes undesired arcing between the contacts, eventually leading to contacts that weld shut or contacts that fail due to a buildup of surface damage caused by the destructive arc energy.

2.Switch and certain other high-reliability designs, the reed switches are always switched "dry" (without load) to avoid that problem, leading to much longer contact life.

4.Low friction ensures high efficiency and long life
5.Simple and reliable structure design

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