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
ELECTRIC
