Single-phased earthing device for bus bars – classic clamp C

Single-phased earthing device for bus bars - classic clamp C

  

Code: Msp – C – Sp/lp – P/p    

The single-phased earthing device is equipped with a classic phase clamp (“C” type) which can be fixed on bus bars in indoor substations.
The “C” classic clamp contains a moulded body made of alluminium alloy and a tightening screw with a bayonet terminal for coupling with PMU insulating sticks.    

Parameter

Value

Earthing cable section Sp (mm2)

16

25

35

50

70

95

120

Nominal short-circuiting current for t = 1s Isc (kA)

3,5

6

8

12

16

20

30

Nominal peak currrent for t = 0,02 s Isd (kA)

8,75

15

20

30

40

50

75

Testing short-circuiting current for t = 1s (kA)

4,6

6,9

9,2

13,8

18,4

23

34,5

Testing peak current for t = 0,02 s (kA)

11,5

17,25

23

34,5

46

57,5

86,25

Peak factor

2,5

Earthing cable length Ip (m)

max. 8,5

Thickness of the bus bar on which the phase clamp can be applied (mm)

max. 40

The single-phase earthing device contains:
– classic phase clamp – 1 piece;
– earthing cable – 1 piece;
– earthing clamp – 1 piece;
The earthing device is delivered in sets of three pieces in a transport bag/box.