Main components of high and low voltage switchgear

High and low supplage switchgear-Cabinet material:

Cold tape steel or angle steel

2. Apply an aluminum-zinc plate or a galvanized steel plate (for assembly cabinet).

3. Stainless steel plate (not magnetic).

4. Aluminum plate ((not magnetic).

High and low voltage switchgear - Functional unit of the cabinet:

Busbar room

The busbar chamber is arranged on the back side of the switchgear, and the mounting three-phase high voltage alternating busbar and the use of the branch bus bar are used. All busbars are plastic with insulated sleeve. When the busbar passes through the switch cabinet spacer, secure it with a bus bar. If an internal fault arc occurs, it can control the accident spread to the neighboring cabinet, and can ensure the mechanical strength of the busbar.

2. Hand car circuit breaker room

Specific guides are installed in the circuit breaker room for buffer handwriting and work. The hand car can move between the working position and the test position. Squeeet of static contacts (trunk) is mounted on the back wall of the handbox. When the hand is moved from the test position to the working position, the separator is automatically opened, and the mobile hand in the anti-direction is completely composite, thereby ensuring the operator does not touch the carrier.

3. Cable room

A current acute device, a ground switch, a lightning arrester overvoltage protector, and a cable, etc. can be installed in the cable room, and the open-removable aluminum plate is prepared at the bottom to ensure the convenience of the site construction.

4. Relay room

On the panel of the relay room, the microcomputer protection device is installed, the handle, protect the outlet plate, instrument, status indicator or status display relay room, the terminal block, microcomputer protection control loop DC power switch, microcomputer protection work DC power supply, storage Can operate power switch DC or communication, and secondary equipment for special requirements.

High and low supplage switchgear - Electrical components in the cabinet:

The following equipment is commonly used in the cabinet (main circuit device):

1, current transformer (CT)

2, voltage transformer (PT)

3, ground switch

4, arresser (blocking absorber)

5, isolation switch

6, high pressure circuit breaker

7, high voltage contactor

8, high pressure fuse

9, transformer

10, high voltage charged display

11, insulating parts [such as: Wall sleeve, contact box, insulator, insulated heat shrink (cold shrink) sheath]

12, home bus and branch bus

13, high voltage reactor

14, load switch

15, high pressure single-phase parallel capacitor

High and low voltage switchgear - Secondary components:

Main secondary components commonly used in the cabinet (also known as secondary equipment or auxiliary equipment, referring to low-voltage equipment for monitoring, control, measurement, adjustment, and protection of primary equipment), and is common as the following equipment:

1.Relay

2. Power meter

3. Current table

4. Voltage meter

5. Power Table

6. Power factor table

7. Frequency table

8. Fuse

9. Air switch

10. Convert switch

11. Signal light

12. Resistance

13. Button

14. Microcomputer integrated protection device, etc.