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VHK9-12 TYPE INTEGRATED COMBINED VACUUM CIRCUIT BREAKER

Short Description:

The VHK9-12 type integrated combined vacuum circuit breaker is a switch developed for the technical interpretation of power users' requirements for the reliability, safety, and compactness of electrical equipment. It is suitable for 12KV/7.2KV power distribution systems in public buildings, commercial residential buildings, industrial and mining manufacturing industries, etc., and also suitable for complete sets of mechanical equipment driven by high-voltage motors that require high compactness.


Product Detail

Product Tags

Environmental Conditions

● Altitude: ≤2000m;

● Ambient temperature: +40℃;

● Relative humidity: daily average ≤95%, monthly average ≤90%;

● The surrounding air should not be significantly polluted by corrosive or combustible gas, water vapor, etc.;

● No frequent violent vibration;

● If have different use conditions, or other special requirements, please consult us in advance.

Technical Parameters

NO.

items

unit

parameters

1

rated voltage

kV

12

2

1min power frequency withstand voltage

kV

42

3

rated lightning impulse withstand voltage

kV

75/85

4

rated current

A

630, 1250

5

rated frequency

Hz

50/60

6

rated short circuit breaking current

kA

25, 31.5

7

rated short circuit breaking current

kA

25, 31.5

8

rated peak value withstand current

kA

50, 63

9

rated short circuit current breaking number

times

30

10

mechanical life

times

10000 (circuit breaker),

3000(disconnect switch/earth switch)

11

auxiliary circuit power frequency withstand voltage

V

2000

Product Technical Features

● Compact / Flexible

The insulation mode of air as medium meets the electrical clearance and local discharge standards of the technical specifications of the electric power industry.

Compact supporting cabinet size, supporting standard cabinet size: 450*1000*1800mm (W*D*H), complete set of power distribution system is particularly compact, saving space for expensive urban construction land.

Flexible form of busbar and extension mode, convenient for other different cabinet type splicing.

● Integrated / Embedded

Integrated circuit breaker combination electrical design, the combination of disconnect switch, circuit breaker, earth switch, charged sensor as one, modular design, simple and reliable interlocking, easy for maintenance. 

● Visualization / Efficiency

Visual disconnect switch fracture design, rapid delivery time, the overall modular design, makes electrical complete factory assembly is convenient and quick.  Monolithic structure, all kinds of interlocking must be realized in the single mechanism, to reduce the risk of interlocking failure caused by assembly process problems in complete electrical factory.

● Stability / Durability

Optional spring/permanent magnet mechanism, long mechanical life, sealed vacuum arc room encapsulation, dust proof, high insulation performance.

Overall Dimensions

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Applicable to Fixed Switchgear Structure

The cabinet body is assembled by bending 2.0mm aluminum-zinc plate, with high strength, light weight, excellent corrosion resistance, separated into independent low voltage room, busbar room, switch room, cable room.

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The fixed type switchgear is composed of the following four parts:

busbar room  main switch  cable room  operating mechanism, interlocking mechanism and low voltage control  upper earthing contact (optional)

Busbar Room

The busbar room is arranged on the upper part of the cabinet.  In the busbar room the main busbars are connected together through the whole row of switchgear. 

Main Switch

Switch room is equipped with circuit breaker which includes circuit breaker, disconnect switch, earth switch and voltage sensor. Through the operation structure in front of the circuit breaker cabinet, the circuit breaker interface can be operated without opening the cabinet door of the switch room.

Cable Room

The circuit breaker cabinet has a generous cable room, which is mainly used for cable connection, so that the single or three core cables can be connected with the simplest unshielded cable connectors. At the same time, sufficient space can also accommodate the arrester, sensor and other components. In standard design, the cabinet door has an observation window and a safety interlock device.

Cable room bottom plate with sealing cover, support frame and the suitable size cable.  Cable room bottom plate and door frame can be removed to facilitate cable installation.

Operating Mechanism, Interlocking Mechanism and Low Voltage Control

The interlocking low voltage room also acts as a control panel.  The low-voltage room is equipped with a spring operating mechanism with a position indicator and a mechanical interlock device. It can also be equipped with auxiliary contact, trip coil, emergency trip mechanism, capacitive charged display, key lock and electric operating device. At the same time, the low-voltage room space can also be equipped with control circuit, measuring instrument and microcomputer protection device. The microcomputer protection device has standby RS232 or RS485 communication interface, which can realize remote monitoring.


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