Connecting Voltage To Input Terminals And Auxiliary Circuit; Starting The Supply Unit - ABB ACS800 Hardware Manual

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Connecting voltage to input terminals and auxiliary circuit

WARNING! When voltage is connected to the input terminals, voltage
may also be connected to the auxiliary circuits of the drive unit(s).
Make sure that it is safe to apply voltage. Ensure that:
• nobody is working on the unit or circuits that are wired from outside into
the cabinets
• covers of motor terminal boxes are in place.
Close the circuit breaker which connects the 24 V DC supply voltage for
the boards [F7].
Close the circuit breaker which connects the supply voltage for the AC
fans and 24 V DC power supply [F11].
Close the circuit breaker which connects the supply voltage for the fan in
the incoming cubicle [F101].
Close the circuit breaker which connects the control voltage for the main
breaker [F12].
Close the circuit breaker which connects the control voltage for the
optional emergency stop circuit [F21].
Close the circuit breaker [F5] which connects the measuring board
(BAMU) to the main circuit.
Check the circuit diagrams and close any other breakers and switches in
the auxiliary circuit. The composition vary depending on the options of
the drive.
Close the doors of the cabinets.
Close the main breaker of the supply transformer.
Close the auxiliary circuit switch [Q10].

Starting the supply unit

WARNING! If the drive is equipped with a brake unit, make sure there
are inverters connected to the intermediate circuit before start. As a rule
of thumb, the sum capacitance of the inverters connected must be at
least 30% of the sum capacitance of all inverters.
Open the grounding switch (if present) and close the drive main
disconnecting device.
Note: The grounding switch and the main disconnecting device are
either mechanically coupled or electrically interlocked: The grounding
switch can be closed only when the main disconnecting device is open.
The disconnector can be closed only when the grounding switch is open.
Close the drive main disconnecting device:
Units with a main breaker (option +F255):
Unlock the withdrawn breaker and rack it in.
Units with a main switch-disconnector (option +F253):
Unlock the switch and turn it into the closed position.
Additional information
Only with option +F253 or +F255.
Only with option +F255.
Only with options Q951, Q952, Q963
and Q964.
Only with option +F253 or +F255.
Optional unit +D150.
If there is not enough capacitive load
at start, the DC voltage will overshoot
the controller voltage limit, causing
immediate start of braking. An
unloaded supply unit keeps the DC
voltage high and the chopper
remains conductive.
Optional device (option +F259). See
delivery specific circuit diagrams.
See delivery specific circuit
diagrams.
Installation checklist and start-up
107