What is a switchgear?

SWITCHGEAR DEFINITION. Switchgear is a general term covering switching and interrupting devices that control, meter and protect the flow of electric power. The component parts include circuit breakers, instrument transformers, transfer switches, voltage regulators, instruments, and protective relays and devices.

What are the operating mechanisms for switchgear?

Operating mechanisms for switchgear can be either stored-energy or dependent-energy closing. Stored-energy closing is frequently achieved by means of a spring which is either manually charged (type QM) or charged by an electrical motor. Dependent-energy closing is by use of a solenoid.

What is a switchgear in a PV power plant?

It is critical to provide various switchgears on the DC and AC side of the PV power plant for protection and isolation purposes while complying with grid connection standards. Switchgear is the combination of electrical disconnect switches, fuse, or circuit breaker used to control, protect and isolate the electrical equipment.

What is the function of auxiliary power system switchgear?

The function of the auxiliaries' power system switchgear is the distribution and control of electrical energy to the station auxiliary plant. Depending upon the station operating regime and the duty of the plant controlled, some circuits are switched frequently, while others may remain on- or off-load for long periods.

What are the components of switchgear?

The component parts include circuit breakers, instrument transformers, transfer switches, voltage regulators, instruments, and protective relays and devices. Switchgear includes associated interconnections and supporting or enclosing structures.

What is a switchgear control circuit?

Figure 5-2 contains a diagram of typical switchgear control circuitry. Switchgear subdivides large blocks of electric power and performs the following missions: Distributes incoming power between technical and non-technical loads. Isolates the various loads. Controls auxiliary power sources.