POWER ELECTRONICS AND CABINET FEATURES
PRODUCT
ACS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS212794 E01
REV.
N
LANG.
en
PAGE
74/266
3.7. Arc resistant design
The optional “Arc Resistant Design” provides the drive with arc fault protection
(see Table 3-7) in accordance with IEC 62477-2.
3.7.1. Internal arc classification
The arc fault rating, which is based on arc fault tests, is on the label underneath the
drive rating plate.
Figure 3-31 IAC label example
IMPORTANT! The Main Circuit Breaker (MCB) for the drive fulfills the APR
(Associated Protection Requirement) without the need for additional devices. The
MCB requirements are described in “2.7 Important note - main circuit breaker”
on page 37.
Based on the ACS6000 IAC rating, the minimum approach distance is 0.3 m. Local
rules may require additional distance. The user is responsible to determine the
correct approach distance considering local rules.
Table 3-7 ABB arc resistant classes
ABB class Description
Class I Protection based on arc prevention (NOT certified according to IEC 62477-2)
Class II
Protection based on arc resistant cabinet structure
(1)
(1)
IAC certified by 3
rd
body according to IEC 62477-2
Class III Protection based on external arc fault limitation and elimination. HV fuses
are applied externally to limit the arc fault current
(1)
Class IV
Fast arc detection and elimination
(1)
IAC
IEC 62477-2
3BHB049908R6220
F L R T B APR SCI
A
t
A
2b
0.3 0.3 0.3 - -
2b 2b 1 1 20 kA 0.5 s Yes No
Distance [m]
Internal Arc Classification (IAC)
ABB Class II
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