Three-phased short-circuiting device for MV overhead lines-application from the pole - clamp CAA

 

Code: Msp – CAA – AST – 3xSf/lf – Sp/lp – O/p – CR     

The three-phased earthing device equipped with automatic self-locking phase clamps (CAA) can be applied from the pole on the MV overhead lines.

The automatic self-locking phase clamp (CAA) is made of moulded aluminium alloy and it is provided with a threaded piece to attach the mounting adaptor and a steel ring for dismounting.
These phase clamps can be applied / removed on / from conductors, one by one, using a connectable insulating stick (code: PMU-20-1-B/baS). The mounting adaptor and the dismounting hook have a bayonet rod in order to be attached to the bayonet coupling system from the top of the stick.

The mounting of the phase clamp is done by pulling the clamp downward over the overhead conductor. After the mounting of each phase clamp, the insulating stick with the mounting adaptor should by detached by unscrewing. 
The removal of the phase clamp is done by hooking and pulling downward of the steel ring using the dismounting hook fixed in the bayonet coupling system of the insulating stick.    

Parameter

Value

Earthing Sp and short-circuiting Sf cable sections  (mm2)

16

25

35

50

70

95

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

4

6

8

12

16

18

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

10

15

20

30

40

45

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

4,6

6,9

9,2

13,8

18,4

20,7

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

11,5

17,25

23

34,5

46

51,75

Peak factor

2,5

Short-circuiting cable length l(m)

max. 2,5

Earthing cable length l(m)

max. 15

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

6÷32

The three-phased short-circuiting device contains:
– automatic self-locking phase clamp (CAA) – 3 pieces
– short-circuiting cables – 3 pieces
– manual earthing clamp – 1 piece
– earthing cable – 1 piece
– earthing rod – 1 piece
– dismountling hook – 1 piece
– intermediary piece – 1 piece

The short-circuiting device is delivered in a transport bag/box.