繼電器是液壓貨梯http://www.shdongkun.com/上的重要部件之一，長(zhǎng)期使用也會(huì)出現(xiàn)失效的狀況，就會(huì)嚴(yán)重影響液壓貨梯的正常工作。那么如何判斷液壓貨梯繼電器是否失效呢?
　　
1、液壓貨梯繼電器線(xiàn)圈通電時(shí)不動(dòng)作。
Hydraulic freight elevator does not move when the relay coil is energized.
　
2、液壓貨梯繼電器線(xiàn)圈斷電時(shí)不返回。
Hydraulic freight elevator does not return when the relay coil is de-energized.
　　
3、液壓貨梯觸點(diǎn)發(fā)生熔接或其他形式的粘接。
Welding or other forms of bonding hydraulic freight elevators contacts occur.

4、液壓貨梯閉合觸點(diǎn)的接觸壓降超過(guò)其規(guī)定范圍內(nèi)的極限值。
Hydraulic freight elevator closed contact contact pressure drop exceeds its limit within a predetermined range.
　
5、液壓貨梯http://www.shdongkun.com/試品零部件有破壞性損壞，連接導(dǎo)線(xiàn)及零部件松動(dòng)。
Hydraulic freight elevators destructive damage to parts of the test, the connection wires and loose components.