Allen-Bradley PowerFlex 527, User Manual, Page: 20 / 176

20 Rockwell Automation Publication 520-UM002B-EN-E - December 2017
Chapter 1 Installation/Wiring
Fuses and Circuit Breakers The PowerFlex 527 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 under Fuses and Circuit Breakers for PowerFlex 527 on page 21
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 Fuses and Circuit
Breakers for PowerFlex 527 on page 21 . 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
(1)
, 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 Fuses and Circuit Breakers for PowerFlex
527 on page 21 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.
Bulletin 140M (Self-Protected Combination Controller)/UL489 Circuit Breakers
When using Bulletin 140M or UL489 rated circuit breakers, the guidelines listed
below must be followed in order to meet the NEC requirements for branch
circuit protection.
• Bulletin 140M can be used in single motor applications.
• Bulletin 140M can be used up stream from the drive without the need for
fuses.
If the DC Bus terminals or the Dynamic Brake terminals are used, the drive must
be installed in an enclosure and fuses must be used for input protection (for CE
applications only). The ventilated enclosure needs to be IP 20 rating or higher
and at least 1.5x size larger than the drive.
(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.