
Core Software Operation
ADDvantage-32 PLUS ● AC to DC Power Converter
3-38
X***:AC VT SCALE
Ratio between sensed AC voltage and actual AC voltage. Leave at default except
for high horsepower AFM applications. When 700 volts sense board P/N A22056
is used, set to 1.9926.
X***:DC VT SCALE
Ratio between sensed DC voltage and actual DC voltage. Leave at default except
for high horsepower AFM applications. When 700 volts sense board P/N A22056
is used, set to 1.9926.
3.19.3 AFM Current Transformer Phasing Procedure
(A20651 SCR Firing Adapter Module)
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W A R N I N G
As an initial operation of any AFM startup, it is important to insure
that the C.T.'s used to sense armature current are correctly phased.
******************************************************
1) Before starting this procedure, the AFM wiring should be completely checked,
drive power up complete, and proper drive software loaded.
2) Remove AFM power. Verify the correct part number and polarity of all current
transformer assemblies. CT P/N = ________________. Also document the
burden resistor values, R = _______________. If there is any question on the
correct values for the burden resistors, go to the burden resistor calculation
procedures starting at step 25.
3) Have a millwright lock the motor rotor. Uncouple motor only if there are felts or
machinery sensitive to backward motion.
4) Connect test fixture/switchbox to the AFM. Terminate E-Stop wires marked 19
and 20 to TB1(19) and (20) or in series with other E-Stop pushbuttons already
wired. Connect fixture Reset wires marked 17 and 18 to TB1(17) and (18).
5) Apply power to the AFM. Test E-Stop and E-Stop Reset functionality.
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