Overview

KYN28A12(2) mid-mounted armored metal-enclosed switchgear (hereinafter referred to as switchgear) is a new type of indoor switchgear developed and developed on the basis of extensively absorbing the advantages of similar products at home and abroad. The switchgear adopts the central structure and has high technical performance index. It is suitable for 3.6-12kV three-phase flow 50Hz indoor single bus or single bus segmented power distribution system for power plants, industrial and mining enterprises, building hotels, Municipal construction and other departments are used to receive and distribute electrical energy, and to control, protect and monitor circuits.

The switchgear fully complies with GB3906, ICE-298 and other standards.

 

Characteristics

◆The switch cabinet adopts ABB VD4 type or domestic advanced VS1 type vacuum circuit breaker. The medium-mounted structure saves about 50% of the space of the circuit breaker handcart, which is more conducive to cable installation.

◆The protection level of the enclosure is IP4X.

◆ Small size and reduced floor space.

◆Light weight, high mechanical strength and assembly precision, beautiful appearance.

◆The cabinet shell has strong anti-corrosion and anti-oxidation ability.

◆The clearance in the cabinet is greater than 125mm, and the air gap in the composite insulation is greater than 60mm.

◆ It has the ability to resist internal arc accidents and ensure the safety of operators in accident situations.

◆The product has a perfect mechanical interlocking device to prevent misoperation, which can effectively prevent electrical misoperation.

 

  The main technical parameters

◆Rated voltage 12 (kV)

◆ rated insulation level

1min power frequency withstand voltage 42 (kV)

Lightning impulse withstand voltage 75 (kV)

◆Rated frequency 50 (Hz)

◆ Busbar rated current: 630, 1250, 1600, 2000, 2500, 3150 (A)

◆ Branch bus rated current: 630, 1250, 1600, 2000, 2500 (A)

◆ 4S rated thermal stability current: 16, 20, 25, 31.5, 40, 50 (kA)

◆ rated dynamic current: 40, 50, 63, 80, 100, 125 (kA)

◆ Circuit breaker rated short-circuit breaking current: 16, 20, 25, 31.5, 40, 50 (kA)

◆Circuit rated short circuit closing current: 40, 50, 63, 80, 100, 125 (kA)

◆Control loop

Communication: 110, 220 (V)

DC: 48, 110, 220 (V)

◆Mechanical life: 20000 (times)

◆ Cabinet shell outer wall protection: grade IP4X

◆ Protection of circuit breaker door opening: grade IP2X

 

Normal use environmental conditions

◆ The altitude does not exceed 1000 meters.

◆Environmental temperature upper limit +400C, lower limit -15°C

◆ Relative humidity: The daily average is not more than 95%, and the monthly average is not more than 90%.

◆ The surrounding air is not polluted by corrosive or flammable gases, water vapor, etc.

◆ No frequent and severe vibrations.

◆ Exceeding the above conditions of use, when the user has special requirements, it can be specially negotiated with the manufacturer.

 

Internal structure