User Manual Instruction Manual
Wiring Requirements for the Drive
4-9
4.5 Selecting Input Line Branch Circuit Protection
Input line branch circuit protection fuses or circuit breakers must be used to protect the
input power lines. Tables 4.3, 4.4, 4.5, 4.6 and 4.7 provide recommended AC line input
fuse and circuit breaker information. Both types of short circuit protection are
acceptable for UL and IEC requirements. The input fuse or circuit breaker ratings
listed in the tables are applicable for one drive per branch circuit. No other load may
be applied to that circuit. Sizes listed are the recommended sizes based on 40° C and
the U.S. N.E.C. Other country, state or local codes may require different ratings.
Fusing
If fuses are chosen as the desired protection method, refer to the recommended types
listed below. If available amp ratings do not match the tables provided, the closest fuse
rating that exceeds the drive rating should be chosen.
• IEC – BS88 (British Standard) Parts 1 & 2
1
, EN60269-1, Parts 1 & 2, type gG or
equivalent should be used.
• UL – UL Class CC, T or J must be used.
Circuit Breakers
The circuit breakers listed in tables 4.3 through 4.6 are for inverse time circuit
breakers.
!
ATTENTION: Most codes require that upstream branch circuit
protection be provided to protect input power wiring. Install the fuses or
circuit breakers recommended in tables 4.4 through 4.7. Do not exceed
the fuse or circuit breaker ratings. Failure to observe this precaution could
result in a dangerous condition and/or damage to equipment.
1. Typical designations include, but may not be limited to the following: Parts 1 & 2: AC, AD, BC, BD, CD, DD,
ED, EFS, EF, FF, FG, GF, GG, GH.