High and low voltage switch cabinet power-on test bench is mainly used for conducting power-on tests on various switch cabinets and boxes before they are manufactured. The test bench can provide multiple AC and DC power sources, and can check whether various types of current meters, voltage meters, energy meters and other instruments installed on the switch cabinets and boxes are indicating normally, and whether the action values of various relays meet the requirements.
The high and low voltage switch cabinet power-on test bench is used to inspect the secondary wiring of the high and low voltage switch cabinets, providing AC and DC power for the opening and closing operations of the switches, and conducting the rapid overcurrent protection actions of the protection devices, as well as performing measurement and testing. The high and low voltage switch cabinet power-on test bench is a conventional testing instrument for conducting factory inspections on the secondary wiring part of the switches.
The working principle of the high and low voltage switch cabinet power-on test bench is similar to that of many other test benches. It all operates based on scientific working principles. Generally speaking, a high and low voltage switch cabinet power-on test bench that can work normally and stably consists of several parts. In terms of input power requirements, it should have three-phase four-wire, and the power voltage should reach 380 volts.
For the high and low voltage switch cabinet power-on test bench, in terms of input current and voltage, it requires a set of adjustable three-phase output with a voltage of less than 100 volts, another set of three-phase output with a voltage of 100 volts, and when the AC input voltage is 220 volts, the current should be less than 10 amperes. At other times, the voltage value is between 0 and 400 volts.
When conducting DC operations, the output voltage ranges from 0 to 260 volts. In addition to this, a specific rated value power supply for DC closing is required. There are two sets of single-phase and one set of three-phase outputs. The single-phase output needs a socket form, while the three-phase output has a fixed value of connection terminals.
When the high and low voltage switch cabinet power-on test bench is in operation, it is necessary to check the power supply. Of course, it is turned off before the operation. After the circuit is opened, due to the generation of current and voltage, some physical characteristics will occur, thereby generating the desired experimental values. The current, voltage, frequency and other meters used for measurement adopt 0.5-class digital meters, and the sensors (current and voltage transformers) and other components adopt 0.5S-class.
Post time: Aug-05-2026