Contacts play a controlling role in the whole electric hoist work play a very important role in our daily work should pay attention to check the contacts section.
1, the contact with copper drops grotto file level contacts polished,manual hoist mechanical strength enough or overtravel reach the required value, replaced with new contacts.
2, to maintain the thread does not burn pine, screws tight weeks, the insulation to keep clean.
3, the contacts of the contactor contact width should be greater than 3/4.
4, arc cover intact, no card contacts, arc suppression coil is not shorted.
5, the contact should be kept open enough distance and overtravel.
6, a contact that is connected to the contact while the deviation does not exceed 0.5mm.
7, requires electric hoist contactor operation light and flexible,lever hoist bearings need regular lubrication.
8, anyway, turn contactor mechanical interlock should be adjusted appropriately when a contactor contact will be contacted, another contactor contacts is not closed, the gap is not less than 3mm.
9, electric hoist contactor magnet contact area should be greater than 75%, the contactor magnet can not skew can not be jamming, manual block and the magnet surface should be kept clean.