繼電器是液壓貨梯http://m.meilijh.com/上的重要部件之一,，長期使用也會出現(xiàn)失效的狀況,，就會嚴(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,、液壓貨梯繼電器線圈通電時不動作,。
Hydraulic freight elevator does not move when the relay coil is energized.
　
2、液壓貨梯繼電器線圈斷電時不返回,。
Hydraulic freight elevator does not return when the relay coil is de-energized.
　　
3,、液壓貨梯觸點發(fā)生熔接或其他形式的粘接。
Welding or other forms of bonding hydraulic freight elevators contacts occur.

4,、液壓貨梯閉合觸點的接觸壓降超過其規(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://m.meilijh.com/試品零部件有破壞性損壞,，連接導(dǎo)線及零部件松動,。
Hydraulic freight elevators destructive damage to parts of the test, the connection wires and loose components.