For safety reasons, the following should be noted when installing and maintaining low-voltage electrical appliances:
(1) Electrical appliances should be installed at locations where there is no strong vibration, and should be at an appropriate height from the ground.
(2) It should be installed vertically, and the inclination should not exceed 5°. For oil-immersed appliances, the insulation oil should never be spilled; the fixing of electrical appliances should be bolted and must not be welded.
(3) Before installing new appliances, the protective oil layer on each contact surface of the appliance should be removed to prevent poor contact.
(4) All metal casings should be grounded or zero-protected to prevent contact electricity; the exposed part of the appliance should have a protective cover to prevent direct contact with electricity.
(5) The protection of electrical appliances should be compatible with the environmental conditions at the installation site. Appliances with appropriate protective measures should be installed in locations where there is a risk of explosion or fire and where there is a large amount of dust or moisture.
(6) During maintenance, it should be noted that the contacts of the electrical appliance are in good contact and tight, and the contact of each phase is consistent, and whether the arc extinguishing device remains intact and clean.