Rockwell Automation Allen-Bradley PowerFlex 520 Series, User Manual, Page: 22 / 272

22 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 1 Installation/Wiring
RFI Filter Grounding
Using a drive with filter may result in relatively high ground leakage currents.
Therefore, the
filter must only be used in installations with grounded AC
supply systems and be permanently installed and solidly grounded (bonded)
to the building power distribution ground. Ensure that the incoming supply
neutral is solidly connected (bonded) to the same building power distribution
ground. Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection. Some
local codes may require redundant ground connections. The integrity of all
connections should be periodically checked.
Fuses and Circuit Breakers
The PowerFlex 520-series drive does not provide branch short circuit
protection. This product should be installed with either input fuses or an input
circuit breaker. National and local industrial safety regulations and/or
electrical codes may determine additional requirements for these installations.
The tables found on pages 24 ... 27 provide recommended AC line input fuse and
circuit breaker information. See Fusing and Circuit Breakers below for UL and
IEC requirements. Sizes listed are the recommended sizes based on 40 °C
(104 °F) and the U.S. N.E.C. Other country, state or local codes may require
different ratings.
Fusing
The recommended fuse types are listed in the tables found on pages 24 ... 27 . If
available current ratings do not match those listed in the tables provided,
choose the next higher fuse rating.
• IEC – BS88 (British Standard) Parts 1 & 2
(a)
, EN60269-1, Parts 1 & 2, type
GG or equivalent should be used.
• UL – UL Class CC, T, RK1, or J should be used.
Circuit Breakers
The “non-fuse” listings in the tables found on pages 24 ... 27 include inverse time
circuit breakers, instantaneous trip circuit breakers (motor circuit protectors)
and 140M self-protected combination motor controllers. If one of these is
chosen as the desired protection method, the following requirements apply:
• IEC – Both types of circuit breakers and 140M self-protected
combination motor controllers are acceptable for IEC installations.
• UL – Only inverse time circuit breakers and the specified 140M self-
protected combination motor controllers are acceptable for UL
installations.
(a) 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.