Introduction of high and low voltage distribution box
What is a high and low voltage distribution box?
High and low voltage distribution box means that is in the electric power supply system for electric power distribution, control, measurement and cohesion of the cable distribution equipment, power supply bureau, substation are usually with high voltage switch cabinet, then the low voltage side of transformer step-down leads to the low voltage distribution box, low-voltage distribution box in the various power panel, control box and switch box, Inside is after some switches, circuit breakers, fuses, buttons, indicators, appearance, wires and other maintenance equipment assembled into one to reach the design function request of the distribution device equipment.
Working principle of high and low voltage distribution box
High and low voltage distribution box is according to the electrical wiring requirements will switch equipment, measuring appearance, maintenance electrical appliances and auxiliary equipment assembled in the closed or half closed metal cabinet or screen, forming a low voltage distribution box. In normal operation, the circuit can be switched on or off by manual or automatic switch. Fault or abnormal operation by maintenance electrical circuit or alarm. Various parameters in operation can be shown by the measurement surface, and some electrical parameters can be adjusted, and the deviation from the normal operation state can be signaled or announced.
Precautions for use of high and low voltage distribution box
1, The power supply criterion is that we need to close the knife gate first, then the load switch, first the high voltage switch, then the low voltage switch, first the power side knife gate, then the load side knife gate, first the power side switch, then the load side switch. In the meantime, the order between each step and each step can not be confused, so as to avoid causing other problems when we use. Power outage sequence, contrary to the above operating guidelines.
2, Before we are closing shall check the low voltage main switch, high voltage switch, each branch switch, matching the breaker is in the closed position, the equipment maintenance after the closing operation should also view the various circuits have earth wire without relief, some related equipment is now restorable, must carefully check wiring fault not to fall again after operation.
3, Before closing, it is necessary to check the operation according to the power supply circuit of a system diagram and the power consumption situation of the field practice, do a good job to ensure the safety arrangement and technical methods, do a good job in accordance with the safety method of the field practice to be able to operate, even if there is a small question in the operation process, it is necessary to make clear the operation. High pressure operation should be carried out by two people together, one person as the operator and one person as the guardian.
High and low voltage distribution box supplier
Shunzhi Electric Power Equipment Co.LTD. (SHZPower) is a professional electrical automation, low and medium voltage switchgear, box-type substation, distribution cabinet, multimedia box supplier. Professional box substation supplier, to provide waterproof, fireproof, moisture-proof, high-quality, durable box substation. If necessary, please feel free to contact us.
