Arc Resistant Design; Internal Arc Classification (Iac) - ABB ACS5000 User Manual

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.
ABB class
Class I
Class II
Class III
Class IV
(1)
IAC certified by 3rd body according to 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.
Internal Arc Classification (IAC)
ABB Class IV
IAC
IEC 62477-2
Distance [m]
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.
3BHS799208 E01 REV E
Table 8-1 ABB arc resistant classes
Description
Protection based on arc prevention (NOT certified according to
IEC 62477-2
)
Protection based on arc resistant cabinet structure
Protection based on external arc fault limitation and elimination.
HV fuses are applied externally to limit the arc fault current
Fast arc detection and elimination
F L R
2b 2b 2b
0.3 0.3 0.3
Figure 8-2 IAC label example
ACS5000 WATER-COOLED USER MANUAL
(1)
T B I
1 1 9.5 kA 0.5 s
- -
08 OPERATION
(1)
(1)
t APR SC
Yes No
3BHB049908R5409
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