Basic electrical principle of UPS uninterruptible power supply
1. wiring problem
(1) the way of wiring
The wiring between A. machines is generally divided into three ways: ground groove, cable hanger or pipeline. The size of the groove is based on the number of cables set. It is generally about 400-600mm wide, about 250-300mm deep and the groove is best located at the bottom of the UPS.
When B. is used for UPS wiring, it is generally required to set up the power supply of the equipment first. If the power transformer is introduced into the equipment environment, the low voltage power line should be over 3m distance from the high voltage power line.
(2) selection of cable diameter
When wiring between equipment, the selected cable must be correctly selected according to the capacity of the equipment and the distance between the equipment to correctly select the permissible current of the cable, the voltage drop and the allowable short circuit current.
The permissible current of A. cable
The main circuit cable can usually be made of CV cable (bridged polyethylene cable) and selected according to the rated current of the circuit and the allowable current of the cable. Due to laying multiple cables, the allowable current rate of the current can be reduced.