Blitz VARIS - Page 8

Operating instructions
Mounting
4
102620 • 05/2019
Electrical connection conditions
The connection to the electrical power system
may be carried out only by adequately trained
expert.
Caution
Neither overvoltage nor undervoltage should be exceeded by 10%.
This unit is intended for operation on a power supply network with a maximum system
impedance Z
max
at the interconnection point (house service line), which is listed in the
table below in dependence of the performance. The user shall have to ensure that the
unit is operated only on a power supply network which meets these requirements. If and
when necessary, the local power supply company can provide information on the system
impedance.
400V-50Hz 3 Ph.
230V-50Hz 1 Ph.
Motor
output
Nominal
motor
current
Pro-
tection –
star-delta
start
Pro-
tection –
direct
start
Power
supply
lead
Fuse
Power
supply
lead
Maximum
system
Impe-
dance
Z
max
kW
A
A
A
mm²
A
mm²

1,1
2,6
6
4G2.5
16
3G2.5
1,5
3,5/4,1
10
4G2.5
16
3G2.5
-/0,254
2,2
5,0/6,0
16
4G2.5
16
3G2.5
0,127/
0,143
3,0
6,6/8,1
16
4G2.5
0,118/
0,106
4,0
8,5
16
20
4G2.5
0,072
5G2.5
5,5
11,5
20
5G2.5
0,177
7,5
15,5
25
5G4
0,102
11,0
22,5
35
5G6
15,0
30,0
50
5G10
18,5
36,0
50
5G10
22,0
43,0
63
5G16
30,0
58,0
80
5G25
Tab. 1: Characteristic value for the electrical connection
The conductor cross sections mentioned are guideline values for a maximum lead length of
50 m at a temperature of 30° C. Use a time-lag fuses or “gl fuses”.
 220 / 240 V systems require a three-core 1P/N/PE cable.
 380 / 400 V systems require a four-core 3P/PE cable for direct start.
 380 / 400 V systems require a five-core 3P/N/PE cable for star-delta start.