How Does Switchgear Work?

Switchgear is a device used to switch, control, and protect circuits and equipment. The demand for electricity has increased a lot, so in order to obtain a continuous power supply. The power system must prevent major failures and provide protection for machinery and equipment. In order to ensure the continuity of power supply, mechanical equipment such as generators and motors are turned on and off many times. The method to achieve this is called switchgear.

Generally speaking, switchgear is a term that includes the entire switchgear and its combination with related control, measurement, protection, and regulation equipment.

What is the function of the switch cabinet

• Carry normal load current

• Making or breaking the normal load current

• Clear fault current

What must be considered when using switchgear in power systems

• The location of the equipment indoors or outdoors

• System parameters, such as system grounding, frequency, insulation level, environmental conditions

• Installation of switchgear-mechanical and electrical interconnection, equipment placed on the foundation, assembly of loose supply parts, connection of control and power circuits

• Switching equipment commissioning-must be tested to ensure that the installation meets the requirements

What are the basic characteristics of switchgear

Reliability-Switchgear is used in power systems to improve the reliability of the system when it fails. The switchgear must isolate the faulty part from the remaining circuit.

Absolutely certain distinction-if the power system fails, then the switchgear must be able to distinguish the faulty part from the normal part.

Fast operation-if there is any failure in the power system, the switchgear must be able to move quickly so as not to cause damage to the equipment.

Provide manual control-switch equipment that must have manual control to prevent any electrical or electronic control failure.

Provide meter-need to provide meter, which can be ammeter, voltmeter...

Type and classification of switchgear

• The classification of switchgear can be passed

• Current rating

• Interrupt rating

• Voltage level-Low voltage (less than 1000 volts)

             Medium voltage (1000-35000 volts)

             High voltage (over 35000 volts)

• Insulating medium-air, gas, oil, vacuum

• Building type-indoor, outdoor, industrial, metal enclosure, metal-clad...

• Current type-AC, DC

• By application-transmission system, power distribution

• Operation method-manual, motor or solenoid valve/energy storage

Baoding Zhongyi Electrical material Manufacturing Co., Ltd. is located at the beautiful Baiyangdian Science and Technology Town in Baoding City, with an advantageous geographical location and convenient transportation. The company mainly produces oil-immersed power transformers, dry-type transformers, box-type substation, high and low voltage switchgear assembly, and a variety of special-type transformers. Our company has passed the ISO9001-2015 international standard quality management system certification. All performance indicators of the products have reached the relevant national standards and international standards.