Have you clarified the electrical primary and secondary circuits?
2023-04-10()click
Primary circuit, also known as main circuit, main circuit, primary system, etc. It mainly consists of primary equipment, including transformers, circuit breakers, load switches, isolating switches, fuses, capacitors, reactors, busbars, power cables, overhead lines, lightning arresters, transformers, etc. It mainly plays the role of converting voltage, transmitting electrical energy, and distributing electrical energy. Compared to the secondary circuit, its voltage is high and its current is high.
Secondary circuit, also known as control circuit, secondary wiring, secondary system, etc. It mainly consists of secondary equipment, including various relays, measuring instruments, measuring meters, control switches, operating power supplies, control cables, and control small busbars. It mainly plays a role in monitoring, measuring, controlling, protecting, and emitting various signals. If the primary system is low voltage (such as AC 380V), this secondary equipment is also called auxiliary equipment. At the same time, the working status of the secondary circuit reflects the true operation of the primary equipment. Compared to the primary circuit, it has low voltage and low current. But there are many secondary devices, and the secondary wiring is much more complex than the primary wiring.
Connecting secondary equipment in a certain order to illustrate the electrical working principle is called a secondary circuit diagram; The secondary wiring diagram is used to illustrate the electrical installation wiring. If the primary system is below 380V, the secondary circuit diagram and wiring diagram can also be referred to as the auxiliary circuit diagram and auxiliary wiring diagram; If mainly used for electrical control, it can also be referred to as control circuit diagram and control wiring diagram. The block diagram of the electrical primary and secondary equipment composition is shown in the figure.
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