Basic knowledge of high and low voltage switchgear

High and low voltage switchgear sets, as key equipment in the power system, play a crucial role in power transmission, control and protection. Let's take a deeper look at the basics of these devices:
1. Definition of high and low voltage switchgear:

High and low voltage switchgear is a kind of equipment used to control high and low voltage circuits in power system. It consists of high voltage part and low voltage part, which can complete the functions of power distribution, control and protection in power system and ensure the normal operation of power system.
2. Structure and composition:
2.1 High pressure part:

    The main components of the high-voltage part include high-voltage circuit breakers, disconnector switches, current transformers, voltage transformers, and other equipment.
    Function: The high-voltage part is used to control and isolate high-voltage circuits to ensure the safe operation of power systems in high-voltage environments.

2.2 Low pressure part:

    The main components of the low-voltage part include circuit breakers, contactors, controllers, protection devices, and other components.
    Function: The low-voltage part is used to control, protect, and distribute low-voltage circuits to ensure the operation of the power system within the normal voltage range.

3. Function and function:
3.1 Control functions:

    Circuit control: control the on-off and on-off operation of the power system.
    Branch control: distributing electrical energy to different power-consuming areas or devices.

3.2 Protection function:

    Overload protection: When the current exceeds the rated value, cut off the circuit in time to prevent damage to the equipment.
    Short circuit protection: Quickly cut off the circuit to prevent short circuit failures.

3.3 Monitoring functions:

    Power parameter monitoring: Monitor current, voltage, power and other parameters to ensure the stable operation of the power system.
    Intelligent monitoring: Support remote monitoring and automated control to enhance the intelligence of the power system.

4. Application field:
4.1 Power system:

    It is used for power distribution control and protection of power systems such as power substations and power plants.

4.2 Industrial sector:

    It is used for the control and distribution of power equipment in large industrial enterprises such as steel, petrochemical, and mining.

4.3 Construction and infrastructure:

    It is used for the control and distribution of power systems in commercial buildings, medical institutions, transportation hubs, and other places.

Conclusion:

High and low voltage switchgear is one of the most important equipment in the power system. It has complex structure, diverse functions and wide range of uses. Through the combination of high voltage and low voltage parts, the control, protection and monitoring of the power system are realized, the safe and stable operation of the power system is guaranteed, and reliable power support is provided for the production and life of various industries.