Xylem SSW-07 Soft-Starter - Manual (Page 20)

CHAPTER 3 - INSTALLATION AND CONNECTION
19
English
3.2.4.1 Power Supply
Capacity
3.2.4.2 Recommended
Fuses
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 25
312 A 25
365 A 25
412 A 25
table 3.6 - Maximum current capacity of the power supply
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 2 t according to item 3.2.4.2.
The fuses to be used on the input must be high speed semiconductor
fuses with l 2 t lower or equal to 75 % of the SCR value indicated in
table 3.7 (A 2 s). The fuse rated current should preferably be equal or
greater than the motor starting current to avoid cyclic overloads and
fuse opening in the forbidden region of the Time x Current curve.
These fuses will protect the SSW-07 in case of a short-circuit.
Normal fuses can also be used, instead of the high speed, which will protect
the installation from short-circuits, but the SSW-07 will not be protected.
For the electronic supply protection of the SSW-07 must be used
fuse type D, or circuit breaker type C as specified in table 3.7.
SSW-07
Model
I²t of
the
SCR
(A²s)
WEG Fuses with CE Certification Fuses with UL Certification (A)
Control
Fuse
Fuse
Nominal
Current
(A)
Fuse Model
(Blade Contacts)
Part
Number
WEG
Fuse
Nominal
Current
(A)
Ferraz Shawmut/
Mersen
Flush End Contacts
Cooper
Bussmann
Bolted
Contacts
17 A 720 63 FNH1-63-K-A 10806688 50 6.6URD30TTF0050 170M2611
2 A
(D Type)
or
2 A
Circuit
Breakers
(C Type)
24 A 4000 80 FNH00-80-K-A 10705995 80 6.6URD30TTF0080 170M1366
30 A 4000 100 FNH00-100-K-A 10707110 80 6.6URD30TTF0080 170M1366
45 A 8000 125 FNH00-125-K-A 10707231 100 6.6URD30TTF0100 170M1367
61 A 10500 160 FNH00-160-K-A 10701724 125 6.6URD30TTF0125 170M1368
85 A 51200 250 FNH00-250-K-A 10711445 200 6.6URD30TTF0200 170M1370
130 A 97000 400 FNH1-400-K-A 10815073 315 6.6URD31TTF0315 170M1372
171 A 168000 500 FNH2-500-K-A 10824109 450 6.6URD32TTF0450 170M3170
200 A 245000 630 FNH2-630-K-A 10824110 500 6.6URD32TTF0500 170M3171
255 A 90000 500 FNH3-500-K-A 10833056 400 6.6URD32TTF0400 170M5158
312 A 238000 710 FNH3-710-K-A 10833591 500 6.6URD33TTF0500 170M3171
365 A 238000 710 FNH3-710-K-A 10833591 550 6.6URD33TTF0550 170M5161
412 A 320000 2 x 500 A FNH3-500-K-A 10833056 700 6.6URD33TTF0700 170M6161
table 3.7 - Recommended fuses