Low voltage isolation switch of the daily operation and maintenance
This mainly talk about low voltage isolation switch, such as the common HGL load isolation switch, the how to do the daily operation and maintenance.
When the isolating switch is damaged for repair, or in periodic overhaul repair, should remove the dust on the floor, in order to ensure good insulation. Check the contact knife contact, if contact knife wear or arc contact arc transition burn, should be promptly replaced. Find contact knife rotary hinge loose, if it is for the bolt, the bolt tightening.
Installing isolation switch, attention should be paid to the bus and the isolating switch terminal connected, not exist great torsional stress, and to ensure the reliable contact. The mounting lever operating mechanism, should regulate the length of the connecting rod protection operation in place, and flexible. Installed to the interrupter device.
( 1) fuse type isolating switch, for example HR17B series of grooved rails must be kept clean, to prevent contamination after the operation is not flexible.
( 2) should always check the isolating switch contact, clean up the dust and oil dirt. Operation mechanism of friction should be regularly add lubricating oil, the action is flexible, prolong the using life of.
( 3) to replace the fuse, the operator should wear work gloves, avoid high temperature and hot melting pipe.
( 4) replacement of the fuse-link, attention should be paid to the replacement of the same model with the specifications of the fuse body.
( 5) should avoid unnecessary disassembly interrupter, remove, must be carefully packed, to avoid accidents.
( 6) to install, in the bus and the socket connection must be cleared of oxide film, and then immediately apply a small amount of industrial Vaseline or conductive adhesive, to prevent oxidation.
( 7) in the repair of load switch, it is necessary to keep the handle and door chain, can not be easily removed. Low voltage isolation switch operation examination items:
( 8) examined whether load current exceeds the rated value of isolating switch.
( 9) check the contact and the isolation switch is connected with no overheating.
( 10) check the insulation rod, the base is damaged and discharge phenomenon.
( 11 ) check contact having no burn, interrupter enclosures are clean complete.
( 12) check the contact is close, three-phase whether concurrent exposure, lead wire nuts for fastening.
( 13) the operating mechanism should be intact, the action should be flexible, divided, closing position should be put in place, the top wire, rod, pin should be normal.
( 14) of the HR3 type fuse type knife switch, with particular attention to adjust its in-phase on contact is closed at the same time and the upper and lower contacts the center position, in order to make close contact.
( 15) check the control load is in the rated capacity, the melt is matched with load.
The above data of electrical switch factory provide for reference purposes only ( www.jiandq.com )