CHAPTER 3 - INSTALLATION AND CONNECTION
19
English
3.2.4.1 Power Supply
Capacity
3.2.4.2 Recommended
Fuses
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).
NOTE!
Use the wire sizes and fuses recommended in tables 3.5 and 3.7.
The connector tightening torque is indicated in table 3.4. Use only
copper wires 70 °C (158 °F).
The Soft-Starter SSW-07 is suitable to be used in a circuit capable
of supplying not more than X (according to table 3.6) symmetrical
rms amperes, Y maximum volts when protected by ultra-rapid fuses.
SSW-07 Model
Y = 220-575 V
X (kA)
17 A 5
24 A 5
30 A 5
45 A 5
61 A 5
85 A 10
130 A 10
171 A 10
200 A 10
255 A 18
312 A 18
365 A 18
412 A 30
Table 3.6 - Maximum current capacity of the power supply
High speed fuses must be used at the input, which will protect the
SSW-07 against short circuit. It is possible to use other protection
devices that will protect the installation; however, in that case the
SSW-07 will remain unprotected.
SSW-07 Model
Nominal
Current
(A)
Maximum I
2
t
(10
3
x A
2
s)
17 A 50 0.57
24 A 80 3.2
30 A 80 3.2
45 A 100 6.4
61 A 125 8.4
85 A 200 40.9
130 A 315 77.6
171 A 450 134
200 A 500 196
255 A 400 72.5
312 A 500 190
365 A 550 190
412 A 700 256
Table 3.7 - Recommended fuses
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