Via L.. Da VINCI, 100, 50028, Tavarnelle V.P – FIRENZE – Tel.
+39
055 80 71 267 /118
Fax. + 39
055 80 71 338
www.telegroup.it
3
2- CURRENT SHORT CIRCUIT
To insure that the equipment will not be subject to short circuits it is necessary to install, upstream of the power factor correction
panels, whether they are fixed or automatic, a circuit of three aM NH type current limiting fuses (or other devices with similar
characteristics) with suitable nominal current specifications and power to break the circuit above the presumed short circuit current.
When the LCC is not known at the point of installation, it may be approximated by the LCC of the transformer (50 KA).
KVAR power
LCC max kA
From 7.5 to 17.5
4
From 20 to 27.5
5
From 30 to 60
6
From 65 to 150
10
From 100 to 150
16
From 160 to 360
20
From 200 to 350
20
From 400 to 1000
40
From 100 to 125
10
From 150 to 175
16
From 200 to 350
20
From 400 to 500
40
From 550 to 1000
50
KVA
V DC%
LCC kA
50
4
1.8
63
4
3.6
100
4
5.77
160
4
7.22
200
4
9.02
250
4
11.37
315
4
14.43
400
4
18.04
500
4
22.73
630
4
19.25
800
6
24.06
1000
6
30.07
1250
6
38.49
1600
6
48.11
2000
6
50.14
