35kV Outdoor HV Copper Strip Cable Branch Box Switch Ring Main Unit Cabinet

35kV Outdoor HV Copper Strip Cable Branch Box Switch Ring main unit Cabinet

Air insulated ring network cabinet - expandable SF6 ring network cabinet, can be freely combined, has a small size, is safe and reliable, and does not require maintenance.

SF6 gas is used as insulation and arc extinguishing medium, and the constant magnetic field arc rotation method ensures strong arc extinguishing ability, good breaking performance, low overvoltage, long electrical life, and maintenance free arc extinguishing chamber.

The load switch - fuse combination electrical appliance has a three position function, perfect sealing, reliable operating mechanism and locking.

The grounding switch has a short-circuit closing function.

The cabinet body is formed by stamping and bending with aluminum coated zinc sheet, which is sturdy and reliable.

96 hour salt spray test conducted by the institution.

The insulated busbar of the main busbar shall be separated by metal partitions between cabinets and shall not generate eddy currents. Both ends of the busbar shall be sealed with insulation sealing.

Measures to prevent electric field concentration and partial discharge shall be taken at the junction of main bus.

The fuse grading cover ensures the insulation performance of the switch cabinet, without electric field concentration and partial discharge.

The ring network cabinet includes the following intervals: switch interval, bus interval, cable interval, mechanism interval, and control protection interval

1) Load switch

Load switches have a certain on-load breaking capacity, which means they can be energized to open and close under light loads, but they cannot be operated frequently. Generally, load switches are equipped with fuses and have stronger arc extinguishing ability than isolation switches.

2) Isolation switch

When the circuit breaker disconnects the circuit, the disconnection of the isolation switch allows for a clear separation of the live and dead parts, serving as an auxiliary switch.

Due to the lack of intuitive external indicators for the contact position of circuit breakers, and in some cases, it cannot be guaranteed that its indication is consistent with the position of the contact, it is necessary to use isolation switches to clearly separate the energized and non energized parts.

In addition, the isolation switch has a certain natural arc extinguishing ability, which is commonly used for the input and disconnection of low current equipment such as voltage transformers and lightning arresters, as well as the connection between a circuit breaker and several devices, making the switching of the circuit breaker through the isolation switch more flexible and convenient.

3) Circuit breaker

A switching device that can close, carry, and disconnect the current under normal circuit conditions, and can close, carry, and disconnect the current under abnormal circuit conditions within a specified time.

4) Grounding switch

Mainly used for equipment maintenance, in order to prevent sudden power calls during the maintenance process, both ends of the maintenance equipment must be grounded.

The grounding switch of the high-voltage distribution cabinet is generally grounded on the output load side. When we repair the load side of the high-voltage distribution cabinet (such as tightening bolts, disassembling cables, etc.), we need to disconnect the switch and close the grounding switch of the distribution cabinet at the same time. This can prevent sudden power calls from causing electric shock accidents, and also discharge the remaining charge, which is conducive to maintenance safety.

Environmental Conditions

(1) Suitable Altitude: ≤2000mSuitable

(2) Temperature: -40℃ ~ +55℃Relative

(3) Humidity: Daily mean ≤95%, monthly mean ≤90%

(4) Gradation of Earthquake Damage: ≤ Level 8

Material of optimal cushion

National standard industrial grade cold rolled + environmental protection label insulation paint is safe, reliable and stable.

Comprehensive technical characteristics of 35kV cable tap box

1. Inner cone plug and pull structure, full insulation, full sealing, full protection structure design, outdoor maintenance free operation.

2. Resistant to heavy pollution, condensation, frost, water overflow, and not limited by altitude.

3. Flexible combination of flexible silicone rubber insulation and aluminum alloy shielding shell can realize the main body of 2-4 branch tap box and shielding joint body (fully insulated bus, with high strength mechanical characteristics and reliable grounding protection characteristics.

4. Flexible connection and branching of cables of different materials and specifications can be realized.

5. Separate phase independent inner cone plug and plug connection, easy to quickly disassemble and replace the cable, can be separately for the main body of the tap box and each cable related test, easy to find and troubleshoot.

6. Equipped with electric indicator, lightning arrester and short circuit fault indicator can be added.

7. Load switch with SF6 insulation and fox extinguishment fully sealed structure is configured to meet the requirements of 35kV power distribution network outage maintenance.

8. The outer box is made of 2mm rust steel plate and electrostatic spraying, which is corrosion-resistant and meets the requirements of environmental protection.

Main technical characteristics of SF6 load switch for 35kV cable tap box

1. Fully insulated, fully sealed and fully protected SF6 load switch

2. It is the load switch, grounding switch and its back to the bus are sealed in the metal shell, the use of spring buckle mechanism, SF6 gas as the fox insulation medium combination of electrical appliances.

3. The inlet and outlet lines of the switch are connected in an internal dimension, so that the cables are fully sealed with the switch.

4. Load switch adopts pneumatic internal blowing structure, strong ability to destroy fox, and does not affect phase and ground insulation, dynamic and static contact with arc contact, greatly improve the number of breaking.

5. The operating mechanism is located in the front of the switch, and the load switch is equipped with spring energy storage or electric operation mechanism, and the operation of the load switch and grounding switch has interlocking device to prevent misoperation.

6.SF6 gas chamber is made of 3mm stainless steel welded, explosion-proof pressure relief device is installed at the back of the gas chamber.

Technical Specifications

Product photo