Universal single phase _ three phase earthing device

Universal single phase _ three phase earthing device


Category:

    

Code:Msp – CCRU – Sp/lp – S/O/P/p     Msp – CCRU – 3xSf/lf – Sp/lp – S/O/P/p
           Msp – CCNU – Sp/lp – S/O/P/p     Msp – CCNU – 3xSf/lf – Sp/lp – S/O/P/p
           Msp – CCU – Sp/lp – S/O/P/p        Msp – CCU – 3xSf/lf – Sp/lp – S/P/p
           Msp – CAU – Sp/lp – S/O/P/p        Msp – CAU – 3xSf/lf – Sp/lp – S/P/p

The universal single phase or three phase earthing device can be provided with one of the following phase clamps:

Universal classic reduced phase clamp, CCRU type (casting from aluminium alloy);
Universal classic normal phase clamp, CCNU type (casting from aluminium alloy);
Universal classic phase clamp, CCU type (extrusion of aluminium alloy);
Universal automatic phase clamp, CAU type (extrusion of aluminium alloy).

All types of phase clamps have a fixing system on the conductor (bars, round conductors, spherical pieces, “T” fixed points), consisting of a mobile die operated by a tightening screw. This screw is provided – to its extremity – with different types of coupling system which allows a quick and safe connection at the insulating stick. The automatic phase clamps are additionally provided with a special system which allows a preliminary fastening of the clamp on conductor (by acting the mobile die). This preliminary fastening is triggered by a hooking or a by a lightly knocking of the clamp on conductor and must be followed by a firm fastening obtained by screwing.

The earthing clamp can be classic (standard models) or with scrapping die (optional models), adapted to the short-circuiting current of the earthing device. The length of the earthing cable should be chosen depending on the positions of application points for phase clamp and earthing clamp. The cross-section of the earthing cable should by chosen depending on the required short-circuiting current.

This equipment is delivered in a carrying bag or a transport case.

 

General characteristics for the earthing devices equipped with universal phase clamps

Earthing cable section Sp (mm2)

16

25

35

50

70

95

120

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

4

6,25

8,75

12,5

17,5

23,75

30

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

10

15,63

21,9

31,25

43,75

59,38

75

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

4,6

7,2

10,6

14,38

20,13

27,31

34,5

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

11,5

17,97

25,16

35,94

50,13

68,3

86,25

Peak factor (SR EN 61230)

 2,5

.

Phase clamp type

Universal classic reduced phase clamp (CCRU)Universal classic normal phase clamp (CCNU)

Universal classic phase
clamp (CAU)

Universal automatic phase
clamp (CAU)

Short-circuiting cables length – three-phase earthing device lf (m)

max. 2,5

max. 2,5

max. 1,5

max. 1,5

Earthing cable length – single phase earthing device /
three phase earthing device lp (m)

max. 10 / max. 7,5

max. 10 / max. 7,5

max. 10 / max. 8,5

max. 10 / max. 8,5

Thickness of rectangular conductor on which can be mounted the phase clamp g (mm)

max. 30

max. 45

max. 40

max. 40

Diameter of coupling piece spherical type (mm)

20 / 25

20 / 25

30

30

Diameter of conductor on which it can be applied the phase clamp øD (mm)

4 ÷ 30

4 ÷ 36

9 ÷ 32

9 ÷ 32