Based on the introduction switchgear

Switchgear (switch cabinet) is an electrical equipment, switchgear cabinet outside first into the master switch, and then enter the sub-control switch, each branch set up according to their needs. Such as instrumentation, automation, motor magnetic switch, a variety of exchanges and contacts, and some also set up the high-pressure chamber and the low pressure chamber switchgear, high-voltage bus features, such as power plants, and some also have to protect the main equipment of low cycle load shedding.

Switchgear (switchgear) main role is in the power system for power generation, transmission, distribution and power conversion process, make opening and closing, control and protection of electrical equipment. Switch cabinet member main circuit breaker, isolating switch, load switch, operating mechanism, transformers and a variety of protection devices and other components. Classification switchgear many, such as through the circuit breaker can be mounted into withdrawable switchgear and fixed switchgear; or according to the different structure of the cabinet can be divided into open switchgear, metal-enclosed switchgear, and metal Closed armored switchgear; depending on the voltage level can be divided into high voltage switchgear, medium voltage switchgear and low voltage switchgear, etc. Mainly for power plants, substations, petrochemical, metallurgy rolling mill, textile, industrial enterprises and residential areas, high-rise buildings and other various occasions.

Classification
◆ Press voltage classification
In accordance with the voltage level classification usually AC1000V and hereinafter referred to low-voltage switchgear (such as PGL, GGD, GCK, GBD, MNS, etc.), AC1000V above called High Voltage Switchgear (eg GG-1A, XGN15, KYN48, etc.), sometimes also High-voltage switchgear voltage is AC10kV called the MV cabinet (eg XGN15 10kV type RMU).
◆ Press the voltage waveform classification
Divided into: AC switchgear DC switchgear.
◆ According to the internal structure of Classification
Withdrawable switchgear (such as GCS, GCK, MNS, etc.), fixed switchgear (such as GGD, etc.).
◆ By Application
Line cabinets, outlet cabinet, metering cabinets, counters compensation (capacitor banks), corner cabinets, bus cabinet.

Related standards
SJ / T 31401-1994 | High Voltage Switchgear integrity assessment requirements and inspection methods.
DL / T 791-2001 | AC inflatable switchgear guide for the selection within households.
DL 404-1991 | Indoor AC High Voltage Switchgear order technical conditions.
DL / T 404-1997 | AC Voltage Switchgear order technical conditions indoors.
DL / T 539-1993 | indoor AC high voltage switchgear and Components condensation and pollution test technical conditions.
TB / T 2010-1987 | 27.5kV switchgear AC electrified railway technical conditions.
DL / T 404-2007 | AC Voltage Switchgear order technical conditions indoors.