50
Installing the drive
ACH550-01 User's Manual
Power wiring (R1…R3 IP54, units with main switch
F278)
This section applies to units with main switch F278. The
main switch is available for drive types up to ACH550-01-045A-4
(power 22 kW) i.e., frame sizes R1 to R3 with degree of
protection of IP54. The main switch option is not UL listed.
The main switch is used for switching off the input power of the
drive. In addition to the main contacts, the switch has one
normally closed auxiliary contact that indicates the state of the
switch.
The main circuit of the drive is shown below.
WARNING!
Before removing the front cover and working on the
drive, isolate the input cables from the main supply at the
distribution board or by opening the disconnector of the supply
transformer. The main switch (F278) does not isolate the
input cables and terminals from the main AC supply.
Note:
The handle of the main switch extends the depth of the
drive 50 mm (1.97 in.).
1.
Remove the front cover. See
Removing front cover (IP54)
on page
39
.
Motor
output
AC
supply
Capacitor bank
Rectifier
U1
V1
W1
U2
V2
W2
Inverter
ACH550-01+B055+F278
Auxiliary contact
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