ABB ACH550-01+B055+F278 Installation Supplement Manual page 3

ACH550-01+B055+F278 Installation Supplement
Operation principle and power cable installation
Applicability
This is a supplement to the ACH550-01 User's Manual [3AFE68258537 (English)]. The
supplement applies to units with main switch option +F278. The main switch is available
for drive types up to ACH550-01-045A-4 (power 22 kW) ie, frame sizes R1 to R3 with
degree of protection of IP54. The supplement instructs how to install the input and motor
cables.
The main switch option is not UL listed.
Safety
Follow the safety instructions given in the ACH550-01 User's Manual [3AFE68258537
(English)].
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 (option +F278) does not isolate the input cables
and terminals from the main AC supply.
Operation principle
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.
AC supply
Dimensions
The handle of the main switch extends the depth of the drive 50 mm (1.97 in.).
Operation principle and power cable installation
ACH550-01+B055+F278
Auxiliary contact
Rectifier
U1
V1
W1
Capacitor bank
Inverter
U2
V2
W2
Motor output
3