Single-phased earthing device for round conductors - automatic clamp CA

   

Code: Msp – CA  – Sp/lp – O/p    

The single-phased earthing device is equipped with an automatic phase clamp (“CA” type) which can be fixed on round conductors in HV/MV substations.
The “CA” automatic clamp contains a moulded body made of alluminium alloy, a special trigger mechanism 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 shortcircuiting 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

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

17 ÷ 32

The single-phased short-circuiting device contains:
– automatic 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.