ABB MicroFlex e150, User Manual

Page: 49 / 180

Electrical installation: AC input, motor and brake 49
Power disconnect and protection devices
A power disconnect should be installed between the input power supply and the
MicroFlex e150 for a fail-safe method to disconnect power. The MicroFlex e150 will
remain in a powered condition until all input power is removed from the drive and the
internal bus voltage has depleted.
The MicroFlex e150 must have a suitable input power protection device installed,
preferably a fuse. Recommended circuit breakers are thermal magnetic devices (1 or
3 phase as required) with characteristics suitable for heavy inductive loads (C-type
trip characteristic). Circuit breaker or fuses are not supplied - see
Recommended
fuses, circuit breakers and wire sizes
on page
136
. For CE compliance, see
Technical
data
on page
153
.
NOTE: Metal conduit or shielded cable should be used. Connect conduits so the use
of a line reactor or RC device does not interrupt EMI/RFI shielding.
Using 2 phases of a 3-phase supply
Power can be derived by connecting two phases of an appropriate three-phase
supply (L1 and L2 for example). When supplying AC power in this way, the voltage
between the two phases must not exceed the rated input voltage of the
MicroFlex e150. A two pole breaker must be used to isolate both lines. Fuses must
be fitted in both lines.
L
N
L
N
L
N
L
N
From
supply Circuit breaker
From
supply Fuse
Circuit breaker and fuse, single-phase
L1 L1
L2 L2
L3 L3
L1 L1
L2 L2
L3 L3
From
supply Circuit breaker From
supply Fuse
Circuit breaker and fuse, three-phase