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NK3S-/40.5KV breaker 3 Permanent Magnet Operators

 NK3S-/35kv/38kV/40.5KV intelligent permanent magnet split circuit breaker OEM/ODM (one permanent magnet operating mechanism per phase)

The NK3S-40.5 outdoor column permanent magnet solid-sealed vacuum circuit breaker is composed of a uniquely designed permanent magnet mechanism and a highly reliable intelligent controller. The device is mainly used in the medium-voltage overhead line power grid, and is used for dividing and combining load current, overload current and short-circuit current, and has 0~3 times automatic reclosing. 
NK-3S-40.5 outdoor high-voltage permanent magnet vacuum circuit breaker can be used as the main transformer 35kV/38KV incoming line, tie line or other 35kv/38KV line switch of substation, or as an on-column switch of distribution network.

The product integrates measurement, control, protection, communication and other functions into one, and has a high degree of intelligence. It is the first choice for realizing distribution network automation and miniaturization of substations.

Extremely high reliability

Complete maintenance free throughout the life

High mechanical life and electrical life

The machine is small in size and light in weight, easy to install

With standard relay protection and fast auto-reclosing function

Main technical parameters of the circuit breaker

Serial number

Project

unit

Value

1

Rated voltage

kV

40.5

2

Rated current

A

1250/1600

3

Rated frequency

Hz

50 or 60

4

Power frequency withstand voltage 1min (wet) (dry)

kV

80/95

5

Lightning impulse withstand voltage (peak)

kV

185

6

Rated short-circuit breaking current

kA

25/31.5

7

Rated short circuit closing current (peak)

kA

63/80

8

Rated peak withstand current

kA

80

9

4S short-time withstand current

kA

31.5

10

Rated operating cycle

 

Points -0.1s - combined -3s - combined - 6s combined - 60s recovery

11

Rated short circuit current breaking times

Times

30

12

Mechanical life

Times

20000

13

Permanent magnet mechanism control voltage

V

DC220/380

14

Secondary circuit 1min power frequency withstand voltage

KV

2

 

Main mechanical parameters of the circuit breaker

Serial number

parameter name

unit

Data

1

Contact opening distance

Mm

18±1

2

Contact overtravel

Mm

3±0.5

3

Opening speed

m/s

1.4-1.8

4

Closing speed

m/s

0.4-0.8

5

Contact closing bounce time

Ms

≤5

6

Interphase center distance

Mm

460±2

7

Three-phase switching

Ms

≤2

8

Conductive loop resistance of each phase

μΩ

<120

9

Closing time

Ms

25~45

10

Opening time

Ms

20~45

11

weight

Kg

295

 

 

Ambient air temperature: -30 ° C ~ +60 ° C;

Altitude: no more than 2000 meters;

The wind speed does not exceed 34m/s;

Vibration or ground motion from outside the switchgear and control equipment is negligible;

Pollution level: Grade IV;

Storage temperature -40 ° C ~ +85 ° C.

 

Need to configure high voltage side voltage transformer + column type boundary permanent magnet controller to use

Permanent Magnet controller 

Outdoor high voltage 40.5KV