Chapter 4 – Commissioning the Supply Section with ISU
4-4
ACA 635 IBGT Supply Sections
Checks with Voltage
Connected to
Auxiliary Circuits
This table is a commissioning checklist for the supply section with
voltage connected to the input terminals, and Auxiliary Control Unit
(ACU).
Action
Information
WARNING!
This section includes instructions for checking/measuring circuits under
voltage. Only a qualified person is allowed to do the work. An appropriate and
approved meter must be used.
IF IN DOUBT, DO NOT PROCEED!
Ensure the actions described in section
are completed.
Measure phase voltages by using the switch and meter on
the cabinet door.
This is an optional feature. If included,
see the circuit diagrams delivered with
the device.
Check the secondary side voltage of the auxiliary voltage
transformer. Close the protection switch on the secondary
side.
See the circuit diagrams delivered with
the device.
Close the breakers of the auxiliary circuits one by one.
Check each circuit by
• measuring correct voltage in terminal blocks
• checking the operation of the devices connected to the
circuit.
Note:
The cooling fans of the IGBT
supply unit will start after the main
contactor is closed.
Check for the correct connection from an external auxiliary
voltage source (e.g. from an Uninterrupted Power Supply,
UPS) to the auxiliary control unit.
This is an optional feature. If included,
see the circuit diagrams delivered with
the device.
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