High-quality relays for excavators: 1114871, 3E5239, 1183534, 111-4871, 3E-5239, 118-3534, 312B L, 317B LN, 322B L, 345B II, 325B LN, 320-A

High-quality relays for excavators: 1114871 3E5239 1183534 111-4871 3E-5239 118-3534 312B L 317B LN 322B L 345B II 325B LN 320-A

In bulldozers and other construction machinery, high-quality relays (such as safety relays) are key components of the electrical control system. Their main function is to monitor the circuit status and quickly disconnect the circuit when abnormalities occur (such as overload or short circuit), thereby protecting core equipment such as the engine and motor from damage. For example, the Shantui SD22 bulldozer's Cummins NT855 engine is equipped with a dedicated diesel engine safety relay.

The core role of relays in bulldozers:

Electrical isolation and protection: Isolating control circuits (such as sensors and switches) from high-power loads (such as the engine and hydraulic system) to prevent high-voltage interference from damaging control equipment.

Overload and short-circuit protection: When the current in the circuit exceeds the rated value, the relay will trigger to disconnect, preventing the equipment from overheating or being damaged.

Signal amplification and switching: Control high-current equipment with a low-current signal, such as safely starting or stopping a high-power motor with a small button or sensor signal.