Power Supply Capacity; Recommended Fuses - WEG SSW-07 Manual Del Usuario

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3.2.4.1 Power Supply
3.2.4.2 Recommended
Fuses
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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
Capacity
of supplying not more than X (according to table 3.6) symmetrical
rms amperes, Y maximum volts when protected by ultra-rapid fuses.
The SSW-07 can be installed on power supplies with a higher
fault level, if it is protected by ultra-rapid fuses with an adequate
interrupting current and an I
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.
The fuse rated current should preferably be equal or greater the
motor starting current to avoid cyclic overloads and fuse opening
in the forbidden region of the Time x Current curve.
Nominal
Maximum
SSW-07
Current
Model
(10
(A)
17 A 50
24 A 80
30 A 80
45 A 100
61 A 125
85 A 200
130 A 315
171 A 450
200 A 500
255 A 400
312 A 500
365 A 550
412 A 700
NOTE!
The maximum I
because of the thyristor constructive type used on this soft-starter.
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Chapter 3 - INStaLLatION aND CONNeCtION
SSW-07 Model
17 A
24 A
30 A
45 A
61 A
85 A
130 A
171 A
200 A
255 A
312 A
365 A
412 A
table 3.6 - Maximum current capacity of the power supply
UL Fuses
Ferraz Shawmut /
I t
2
x A s)
3 2
Mersen
0,72 6.6URD30TTF0050 170M2611
4 6.6URD30TTF0080 170M1366
4 6.6URD30TTF0080 170M1366
8 6.6URD30TTF0100 170M1367
10,5 6.6URD30TTF0125 170M1368
51,2 6.6URD30TTF0200 170M1370
97 6.6URD31TTF0325 170M1372
168 6.6URD32TTF0450 170M3170
245 6.6URD32TTF0500 170M3171
90 6.6URD32TTF0400 170M5158
238 6.6URD33TTF0500 170M3171
238 6.6URD33TTF0550 170M5161
320 6.6URD33TTF0700 170M6161
table 3.7 - Recommended fuses
t of the SSW-07 255 A fuse is smaller than 200 A
2
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Y = 220-575 V
X (kA)
5
5
5
5
5
10
10
10
10
25
25
25
25
t according to item 3.2.4.2.
2
WEG
Cooper
Fuses
Bussmann
10806688
10705995
10707110
10707231
10701724
10711445
10815073
10824109
10824110
10833056
10833591
-
-
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Control
Fuses
2 A
(D Type)
or
2 A
Circuit
Breakers
(C Type)
19