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

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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
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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.
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).
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Grounding Cable
)
AWG
(mm
2
12
2.5
10
4
10
6
8
10
6
16
4
16
1
25
2/0
35
3/0
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
6
6
6
14
14
14
14
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