3 recommended power and grounding cables – Xylem SSW-07 Soft-Starter User Manual
Page 19
CHAPTER 3 - INSTALLATION AND CONNECTION
18
English
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
Model
Power Cable
Grounding Cable
(mm
2
)
AWG
(mm
2
)
AWG
17 A
4
12
4
12
24 A
6
10
6
10
30 A
6
10
6
10
45 A
10
8
6
10
61 A
16
6
10
8
85 A
25
4
10
8
130 A
50
1
25
4
171 A
70
2/0
35
2
200 A
95
3/0
50
1
255 A
120
250 kcmil
2.5
14
312 A
185
350 kcmil
2.5
14
365 A
240
500 kcmil
2.5
14
412 A
300
600 kcmil
2.5
14
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.
ATTENTION!
The overvoltage control in the line that feeds the soft-starter must
be done using overvoltage suppressors with a clamping voltage of
680 Vac (phase-to-phase connection) and an energy absorption
capability of 40 joules (17 A to 200 A models) and 80 joules (255 A
to 412 A models).
3.2.3 Recommended
Power and
Grounding
Cables
3.2.4 Power Supply
Connection to
the Soft-Starter
SSW-07