ABB ACS5000 - Arc Resistant Design; Internal Arc Classification (IAC)

08 OPERATION
3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL 136/186
8.10 Arc resistant design
The arc resistant design provides the drive with ABB class IV arc fault
protection (see Table 8-1) in accordance with IEC 62477-2.
8.10.1 Internal arc classification (IAC)
The arc fault rating, which is based on arc fault tests, is on the label
underneath the drive rating plate of the drive.
Figure 8-2 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 35.
Table 8-1 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 3rd 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
3BHB049908R5409
F L R T B APR SCI
ඉ
t
ඉ
2b
0.3 0.3 0.3 - -
2b 2b 1 1 9.5 kA 0.5 s Yes No
Distance [m]
Internal Arc Classification (IAC)
ABB Class IV