WEG SSW07 Series, User Manual, Page: 22 / 168

CHAPTER 3 - INSTALLATION AND CONNECTION
21
English
SSW-07
Model
I²t SCR
(A²s)
FNH aR
Blade Contacts
17 A 720 FNH1-63-K-A
24 A 4000 FNH00-80-K-A
30 A 4000 FNH00-100-K-A
45 A 8000 FNH00-125-K-A
61 A 10500 FNH00-160-K-A
85 A 51200 FNH00-250-K-A
130 A 97000 FNH1-400-K-A
171 A 168000 FNH2-500-K-A
200 A 245000 FNH2-630-K-A
255 A 90000 FNH3-500-K-A
312 A 238000 FNH3-710-K-A
365 A 238000 FNH3-710-K-A
412 A 320000 2 x FNH3-500-K-A
Table 3.8 - I²t of the SCR and aR Weg fuses
Ultra-fast fuses (aR), with l²t smaller than or equal to 75 % of the
value of the SCR indicated (A²s) in table 3.8.
NOTE!
The maximum I²t of the fuse of the SSWs varies according to the
design of the SCR used; therefore, higher rated currents may
present lower I²t.
The fuse rated current should preferably be equal to or higher than
the motor starting current in order to prevent cyclic overloads and
the tripping of the fuse in the prohibited area of the Time x Current
curve.
The proper sizing of the fuse should take into account: the local
standards for electrical installations, the starting cycle, number
of starts per hour, starting current and starting time, ambient
temperature and altitude.
For the correct sizing of the fuses, see WEG Fuse Catalog:
www.weg.net
Automation - Fuses aR and gL/gG - Type NH Blade Contact, NH
Flush End and Diametral.
Annex 1: Sizing Criteria for Ultra-Fast Fuses aR Blade Contact and
Flush End.
Annex 2: Table for aR Fuse Sizing to Protect SSW Soft-Starters
and CFW Inverters.
For the electronic supply protection of the SSW-07 must be used
fuse type D, or circuit breaker type C:
Fuse 2 A Type D or Circuit breakers 2 A Type C.
3.2.4.3 Control
Fuse