Single-phased earthing device for round conductors - classic clamp Cr

 

Code: Msp – Cr – Sp/lp – O    

The single-phased earthing device is equipped with a classic phase clamp (“Cr” type) that can be fixed on round conductors in HV/MV substations.
The “Cr” classic clamp contains an extruded 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 short-circuiting current for t = 0,02 s (kA)

11,5

17,25

23

34,5

46

57,5

86,25

Maximum length of the earthing cable Ip (m)

17,5

17,5

17,5

17,5

17,5

10

10

Peak factor

2,5

Conductor diameter on which the clamp can be applied (mm)

17 ÷ 32

The single-phase earthing device contains the following components;
– classic phase clamp – 1 piece;
– earthing cable – 1 piece;
– earthing clamp – 1 piece;

The earthing device equipped with cables with 120 mm2 sections and lengths greater than 9,5 m is provided only with earthing lug (without earthing clamp).

The earthing device is delivered in sets of three pieces in a transport bag/box.