MANUAL MOTOR STARTER GUIDE
APRIL 19 75/80
7.6.2.3 Protection of ABB Micro drives
Type E manual self-protected Combination Motor Controllers can be used for the protection of frequency converters
(e.g. variable frequency drives). This requires further component-level short- circuit testing to be performed accord-
ing to UL 508C. ABB has performed testing to allow the use of manual motor starters for the protection of ACS150
and ACS3xx Micro drives.
The additional criteria for line-side terminal spacing and visible trip indication described in Chapter 7.6.2.1 Manual
self-protected Combination Motor Controllers, Type E, are also required for the Type E manual self-protected Combi-
nation Motor Controllers used in this application.
The use of manual motor starters for drive protection provides customers with a compact and cost-efficient
alternative to non-resettable semiconductor fuses.
Protection of ABB Micro drives
Branch functional requirements
Disconnect means
Short-circuit and ground-fault protection
Control means
Overload protection
variable frequency drive
component-level (see below)
m voltage: 480Y/277V
Upstream branch protection:
not required
Figure 46: Protection of ABB Micro drives
For more information regarding ABB’s tested combinations with Type E manual self-protected Combination Motor Controllers and ACS150
/ ACS3xx Micro drives, please consult the relevant document, which can be accessed from the Download Center(https://library.abb.com
).
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