What is the significance of the low voltage switchgear?

The main function of the low-voltage switchgearis to control and protect the power system. The low-voltage switchgear can run through the grid, and then put the operational needs through some power equipment or some lines for input, or exit operation.

What are the primary equipment included in the low-voltage switchgear?

What are the secondary equipment included in the low-voltage switchgear?

How to operate the low-voltage switchgear?

What are the primary equipment included in the low-voltage switchgear?

Primary equipment mainly refers to equipment that directly produces, converts, and transmits and distributes energy. There are:

1. Motor: The equipment that produces and converts electrical energy includes synchronous generators, transformers and motors.

2. switchgearing electrical appliances: used to connect and disconnect circuits. High-voltage switchgear appliances include circuit breakers (switchgears), isolating switchgears (knife switchgears) and load switchgears. Low-voltage switchgear appliances include knife switchgears, combination switchgears and low-voltage circuit breakers.

3. Current-limiting electrical appliances: used to limit short-circuit current. Including ordinary reactors and split reactors.

4. Current-carrying conductors: mainly include bus bars, overhead lines and cables. Busbars are used to collect and distribute electrical energy or to connect generators, transformers and power distribution devices; overhead lines and cable lines are used to transmit electrical energy.

5. Compensation device: There are adjustable cameras, power capacitors, arc suppression coils and shunt reactors.

6. Transformers: including current transformers and voltage transformers. The function of the current transformer is to change the high current of the AC into a small current. And it supplies power to the current coil of the measuring instrument, the relay protection device and voltage coil of relay protection device.

7. Protection of electrical appliances: including fuse (insurance), lightning protection device (used to protect against overvoltage).

8. Insulator: used to support and fix the current-carrying conductor, and to insulate the current-carrying conductor from the medical history or to insulate the current-carrying conductors of different potentials in the device.

9. Grounding device: there is a working grounding to ensure the normal operation of the power system and a protective grounding to protect personal safety.

What are the secondary equipment included in the low-voltage switchgear?

The main function of the secondary equipment is the auxiliary equipment for the detection, measurement, control, protection and adjustment of the primary equipment. There are:

1. Measuring meters: ammeters, voltmeters, power meters, electric energy meters, frequency meters, temperature meters, etc.

2. Juyuan monitoring device: monitor the insulation status of AC and DC power grids.

3. Control and signal devices: control switchgears, buttons or signal lights, etc.

4. Relay protection and automatic device: The function is to act on the circuit breaker to trip when a fault occurs, or to make the standby power supply automatically turn on, and the transmission line automatically recloses, etc.

5. DC low-primary equipment: including battery packs and silicon rectifiers. That is, the DC screen in the low-voltage power distribution cabinet.

6. Plug-in coil (high-frequency wave trap): It prevents high-frequency current from leaking to substations or branch lines and reduces high-frequency energy loss.

How to operate the low-voltage switchgear?

The operation of the low-voltage switchgear is also very convenient and simple. We can check and repair the line without power failure, and the components in the low-voltage switch cabinet will not affect each other. However, we should pay attention to only controlling the low-voltage switch line, so as to control the walking route of the circuit.

Zhejiang Zhegui Electric Co., Ltd maintains close relationships with customers in low-voltage switchgear , and is committed to strengthening production and operation, improving quality and safety.