Knowledge Dry Goods! Analysis Of Some Common Faults And Causes Of Underground Electric Vehicles

Electric Locomotive does not run after the controller is closed

1. Circuit breakage may be due to insufficient elasticity which prevents the slide board from contacting the overhead line or the power line from breaking or loosening the terminal.

2. The contacts of the automatic switch are burnt off, the power supply wire is broken, the terminal is broken off or the magnetic coil is broken.

3. Wire breaks because the main and auxiliary contacts of the controller fall off or are not in good contact.

4. Start-up resistance circuit breaking

5. Breaking of main pole or commutation pole coil of traction motor, breaking of connecting wire or terminal, or bad contact between brush and commutator

6. Driving Underground Mining Locomotive without loosening the brake due to wrong operation

The starting speed of the locomotive controller is too slow or too fast after closing

1. Locomotive Too slow: Some contacts in the controller circuit connect wires to short circuit, resulting in single machine operation or starting resistance should be disconnected without disconnection.

2. Locomotive Too fast:starting resistance short circuit; excitation winding short circuit of traction motor

Locomotive Lighting lights are not bright and dimmed

1. Lighting lamp is not on: fuse burning; bad contact or burning of light switch contacts; bad contact or burning of light head; power or ground wire breaking; lighting resistance grounding or breaking

2. Dimming of illumination lamp: excessive voltage drop of traction power grid or voltage drop of battery power supply device; poor contact between electrical appliances and overhead wires

3. There are circuit breaks in the lighting resistance of multi-transistor parallel connection