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5.2 Installing Fuses for Branch Circuit Protection
Install the required, user-supplied branch circuit protection fuses according to the
applicable local, national, and international codes (e.g., NEC/CEC). The fuses must
be installed in the line before the drive input terminals. See figures 5.1 and 5.2. Fuse
value selections are provided in table 3.12.
5.3 Installing a Required External/Separate Input
Disconnect
An input disconnect must be installed in the line before the drive input terminals in
accordance with local, national, and international codes (e.g., NEC/CEC). The
disconnect should be sized according to the in-rush current as well as any additional
loads the disconnect might supply. The trip rating for the inrush current (10-12 times
full load current) should be coordinated with that of the input isolation transformer, if
used. Refer to section 5.1 for additional information. Note that 200-400 HP drives may
be supplied with an optional AC disconnect.
5-2
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Drive
1 HP
2 to 3 HP
5 HP
7.5 HP
10 HP
15 HP
20 to 25 HP
30 HP
40 HP
50 to 60 HP
200 to 400 HP
ATTENTION: Most codes require that upstream branch protection be
provided to protect input power wiring. Failure to observe this precaution
!
could result in severe bodily injury or loss of life.
Table 5.1 – AC Line Reactors
Line Reactor Inductance (+/-10%)
GV3000/SE AC Drive Hardware Reference, Version 6.06
12.0 mh
6.5 mh
3.0 mh
2.5 mh
1.5 mh
1.2 mh
0.8 mh
0.7 mh
0.5 mh
0.4 mh
30 µh
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