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The portable three-phase short-circuiting device with automatic phase clamps (type CA) is used on flat busbars in medium-voltage switchgear.
The automatic phase clamp has a cast aluminium-alloy body and a clamping screw with a bayonet coupling at one end for connection to the insulating stick.
|
Parameter |
Value |
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|
Phase cable cross-section S f and earthing cable cross-section S p (mm2) |
16 |
25 |
35 |
50 |
70 |
95 |
120 |
|
Rated short-circuit current for t = 1s I sc (kA) |
4 |
6,25 |
8,75 |
12,5 |
17,5 |
23,75 |
30 |
|
Rated peak current for t = 0,02 s I sd (kA) |
10 |
15,63 |
21,9 |
31,25 |
43,75 |
59,38 |
75 |
|
Short-circuit test current for t = 1s (kA) |
4,6 |
7,2 |
10,06 |
14,38 |
20,13 |
27,31 |
34,5 |
|
Peak test current for t = 0,02 s (kA) |
11,5 |
17,97 |
25,16 |
35,94 |
50,31 |
68,3 |
86,25 |
|
Power factor (according to SR EN 61230) |
2,5 |
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|
Phase cable length I f (m) |
max. 1,5 |
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|
Earthing cable length I p (m) |
max. 7 |
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|
Thickness of flat busbar accepting the phase clamp (mm) |
max. 37 |
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The three-phase short-circuiting device includes the following components:
- automatic phase clamps – 3 pieces;
- phase cables – 3 pieces;
- earthing cable – 1 piece;
- earthing clamp – 1 piece.
The short-circuiting device is supplied in a carrying bag/case.
