Recommended Power And Grounding Cables; Power Supply Connection To The Soft-Starter Ssw - WEG SSW-07 Manual Del Usuario

Chapter 3 - INStaLLatION aND CONNeCtION
3.2.3 Recommended
Power and
Grounding
Cables
3.2.4 Power Supply
Connection to
the Soft-Starter
SSW-07
18
The described specifications in table 3.5 are valid only for the
following conditions:
 Copper wires for 70 ºC (158 ºF) with PVC insulation for ambient
temperature of 40 ºC (104 ºF), installed in perforated and not
agglomerated conduits.
 Naked or silver coated copper busbars with round edges with 1
mm radius with ambient temperature of 40 ºC (104 ºF) and bus
temperature of 80 °C (176 °F).
NOTE!
For correct cable dimensioning, consider the installation condition
and the maximum permitted line voltage drop.
SSW-07
Power Cable
(mm
Model
17 A 2.5
24 A 4
30 A 6
45 A 10
61 A 16
85 A 25
130 A 50
171 A 70
200 A 95
255 A 120
312 A 185
365 A 240
412 A 240
table 3.5 - Minimum cable gauge specification
DANGER!
The AC input must be compatible with the voltage range of the
Soft-Starter SSW-07.
DANGER!
Provide a power supply disconnecting switch for the Soft-Starter
SSW-07. This disconnecting switch must disconnect the AC input
voltage to the Soft-Starter SSW-07 whenever necessary (for
example: during maintenance services).
If a disconnected switch or a contactor is inserted in the motor supply
line never operate these devices with the motor running or when
the Soft-Starter SSW-07 is enabled.
Grounding Cable
) AWG (mm
2
14 4
12 6
10 6
8 6
6 10
3 10
1/0 25
2/0 35
4/0 50
250 kcmil 2.5
400 kcmil 2.5
500 kcmil 2.5
600 kcmil 2.5
) AWG
2
12
10
10
10
8
8
3
2
1/0
14
14
14
14