1. primary equipment: primary equipment refers to equipment that directly generates, transmits, distributes and uses electric energy, mainly including transformers, high-voltage circuit breakers, disconnectors, buses, lightning arresters, capacitors and reactors.
2. Secondary equipment: The secondary equipment in a substation refers to the equipment that measures, monitors, controls and protects the operation status of primary equipment and systems. It is mainly composed of relay protection device, automation device, measurement and control device (current transformer and voltage transformer), metering device, automation system and DC device that provides power for secondary equipment.
In terms of electrical equipment, the primary equipment is mainly open-air equipment, and gradually develops into fully enclosed gas combination appliances and semi-enclosed gas combination appliances. Secondary equipment developed from early transistor and integrated circuit protection to microcomputer protection.
Extended data:
Basic requirements of substation electrical equipment:
1. Reliable protection measures should be taken for live equipment exposed on the ground and easily touched by human body.
2. The live part of the equipment should keep a safe distance from the ground and other live parts.
3. Power systems prone to overvoltage should have overvoltage protection devices, such as lightning rods, lightning wires, lightning arresters and protective gaps.
4. The low-voltage power system should have grounding and zero protection devices.
5. Different types of protection measures such as high-voltage fuses and circuit breakers should be installed for various high-voltage electrical equipment; Low-voltage electrical equipment should take corresponding low-voltage electrical protection measures.
6. Safety signs should be set on the installation site of electrical equipment.
7, according to the characteristics and requirements of some electrical equipment, special safety measures should be taken.
Baidu encyclopedia-substation
Baidu encyclopedia-substation