Dnk Disconnect Switches Usage: Industrial

Our reputed industry is offering an excellent quality of Dnk Disconnect Switches. AC High Voltage DNK Disconnect Switches are mainly applied in AC10-40.5KV 50HZ power supply sistem as devices to switch the unloaded high voltage lines with charge and isolate the electical devices such as high voltage bus and breaker etc to repair. These switches are widely used in industries like electric power, railway, mining and oil field.

IEC62271-102:2002 a High-Voltage Disconnect Switcha
GB1985-2004 a AC High -Voltage Disconnect Switch and Earthing Switcha
GB/T11022-99 a General Technical Specifications for High -Voltage Switching Devicesa

Technical Parameters
No.
Item
Data

10KV
20 KV

1
Rated voltage
12 KV
24 KV

2
Rated lightning impulse voltage withstand (peak)
Phase to earth
95 KV
125 KV

Between interrupting points
110 KV
145 KV

3
Rated AC voltage withstand (virtual)
Phase to earth
50 KV
60 KV

Between interrupting points
60 KV
70 KV

4
Rated frequency
50HZ/60HZ

5
Rated current
100A, 400A, 630A,1000A, 1250A

6
Distance between interrupting points
a Y220mmi 350mm

7
Rated short time current withstand
25KA, 20KA, 16KA/4S
25KA, 20KA, 16KA/4S

8
Rated peak current withstand
40KA , 50KA
40KA , 50KA

9
Mechanical longevity (on/off time)
2000times
2000times

10
Acceptable temperature for operation
-40a i +55a
-40a i +55a

11
Insulator creepage-distance
410mm
680mm