User Manual

5-2
GV3000/SE AC Drive Hardware Reference, Version 6.06
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.
Table 5.1 – AC Line Reactors
Drive Line Reactor Inductance (+/-10%)
1 HP 12.0 mh
2 to 3 HP 6.5 mh
5 HP 3.0 mh
7.5 HP 2.5 mh
10 HP 1.5 mh
15 HP 1.2 mh
20 to 25 HP 0.8 mh
30 HP 0.7 mh
40 HP 0.5 mh
50 to 60 HP 0.4 mh
200 to 400 HP 30 µh
!
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.