Analyze the basic knowledge of Low voltage switch cabinet

2025-10-16 17:06:09

With the rapid development of power technology, Low voltage Switch cabinet are a very common product in our production and life. However, many of our users do not know much about them, so we will explain the basic knowledge of Low voltage switch cabinet to everyone.

As the name suggests, Low voltage switch cabinet are distribution equipment used in the power supply system for power distribution, control, measurement, and cable connection. Generally, power supply bureaus and substations use High-voltage switchgear, which is then led out to Low voltage switch cabinet through transformers to reduce voltage on the low-voltage side. An Control distribution box is a power distribution device that integrates protective devices such as switches, circuit breakers, fuses, buttons, indicator lights, instruments, and wires to meet design functional requirements.

2. When working on all and partially charged Low voltage switch cabinet, the maintenance equipment should be separated from the operating equipment.

3. The structure of Low voltage switch cabinet is roughly similar, mainly divided into busbar room, circuit breaker room, secondary control room, and feeder room. Each room usually has steel plate isolation. Internal components include busbars, circuit breakers, conventional relays, comprehensive relay protection devices, measuring instruments, indicator lights, etc.

4. Secondary windings with current transformers and voltage transformers should have reliable protective grounding.

When operating Closed distribution box, insulated tools should be used, insulated gloves should be worn, and if necessary, relevant relay protection devices should be stopped before work.

6. Strictly prevent Low voltage switch cabinet from short circuiting or grounding.

When Low voltage switch cabinet are connected to temporary loads, they must be equipped with dedicated switches and fuses.

In the power on test of the secondary circuit of an Low voltage switch cabinet, in order to prevent the secondary side from reversing voltage, in addition to disconnecting the secondary circuit, the fuse should also be removed.