Operantes principium pressurae altae et humilis arcae pressura

High and low voltage switchgear is connected to high voltage or low voltage cable equipment, the general power supply bureau, substation are using high voltage cabinet, and then the transformer step-down and then to the low voltage cabinet, the low voltage cabinet in the power distribution box, which is some switch circuit breakers and other protection devices assembled into one of the electrical equipment. High and low voltage switchgear is divided into low voltage withdrawable switchgear, AC low voltage distribution cabinet, metal armoured shift switchgear, low voltage fixed divided switchgear, high voltage capacitor cabinet and high voltage switchgear.

High and low voltage switch cabinet is a kind of electrical equipment, the external control switch into the cabinet, and then into the branch control switch, each branch is set according to its needs. Such as instruments, automatic control, motor magnetic switches, various AC contactors, etc., some also have high voltage chamber and low voltage chamber switchgear, with high voltage bus, such as power plants, etc., and some also have low cycle load reduction for the main equipment.

Low-voltage drawout switchgear is widely used in power plants, substations, factories and mining enterprises and high-rise building power distribution center PC and motor control center MCC, as AC 50-60Hz, rated operating voltage of 1kV and below, rated current of 6300A and below power supply system distribution, motor centralized control. Low voltage power distribution unit for reactive power compensation.

Ac low-voltage distribution cabinet is suitable for power plants, substations, factories and mining enterprises and other power users of AC 50Hz rated working voltage 1kV and below, rated working current up to 6300A distribution system, as power, lighting and distribution equipment of electric energy conversion, distribution and control.

The high voltage switch cabinet is composed of a cabinet and a circuit breaker. The cabinet is composed of a shell, electrical components (including insulation parts), various mechanisms, secondary terminals and connections.