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KYN61-40.5 Medium-Voltage Switchgear Cabinet


KYN61-40.5 Medium-Voltage Switchgear Cabinet


Product Overview

The cabinet structure is assembled from aluminum-zinc coated steel sheets, and the circuit breaker adopts a drawer-type, floor-mounted design.

The cabinet can be reliably wall-mounted and features front-access maintenance, reducing the floor space required.

High protection rating, preventing debris and pests from entering;

The functional compartments of the switchgear are separated by metal partitions, and each—circuit breaker compartment, busbar compartment, and cable compartment—is equipped with its own independent pressure-relief channel.

Simple and effective “five-protection” interlocking to prevent misoperations;

The circuit breaker compartment, relay compartment, and cable compartment can each be equipped with heaters upon request to prevent condensation and corrosion.

Its enclosure protection rating is IP4X; when the circuit-breaker compartment door is open and the circuit-breaker trolley is in the open/test position, the protection rating is IP2X.

The circuit breaker compartment and cable compartment can each be equipped with lighting devices according to user requirements, facilitating maintenance and inspection.

Replacing the circuit breaker is simple, and the handcart is highly interchangeable.

 

Environmental conditions

 

1

Ambient temperature

Not higher than +40℃ and not lower than -15℃, with the average temperature over 24 hours not exceeding +35℃.

2

Altitude

Altitude not exceeding 1000m.

3

Relative humidity

The daily average shall not exceed 95%, and the monthly average shall not exceed 90%.

4

Earthquake intensity

No more than 8 degrees.

5

Water vapor pressure

The daily average shall not exceed 2.2 kPa, and the monthly average shall not exceed 1.8 kPa.

6

 

Locations free from fire hazards, explosion risks, severe contamination, chemical corrosion, and intense vibrations.

 

Performance parameters

 

Serial number

Name

Unit

Numerical value

1

Rated voltage

kV

40.5

2

Rated current

A

630 1250 1600 2000 2500

3

Rated frequency

Hertz

50/60

4

1-minute power frequency withstand voltage between terminals and to ground

kV

95

5

1-minute power-frequency withstand voltage isolation break point

kV

110

6

Lightning impulse withstand voltage (peak) 
Between poles, to ground

kV

185

7

Lightning impulse withstand voltage (peak) 
Isolation break

kV

215

8

Main bus rated current

A

630 1250 1600 2000 2500

9

Rated current of the busbar branch

A

630 1250 1600 2000 2500

10

Rated short-circuit breaking current

kA

20 25 31.5

11

Rated short-time withstand current / Rated short-circuit duration

kA/4S

20 25 31.5

12

Rated peak withstand current

kA

50 63 80

13

Rated short-circuit making current

kA

50 63 80

14

1-minute auxiliary circuit power-frequency withstand voltage

V

2000

15

Protection level

 

IP4X (with circuit-breaker doors or compartments open, the rating is IP2X)

16

Rated voltage of the auxiliary control circuit

V

AC or DC 110/220

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