Armature Current (IA CAL)
Note the maximum armature current from the motor rating plate and set this value using SW1, SW2 and SW3. The switches set Amps in hundreds,
tens and units. The illustration above shows an IA CAL setting of 77A. (For increased accuracy, particularly with very low current motors, set the
switches to 1A less than the motor rating plate value, since there is always a fixed, additive 1A calibration on the power stacks.)
Field Current (IF CAL)
Note the nominal field current from the motor rating plate and set this value using SW4, SW5 and SW6. The switches set Amps in tens, units and
tenths. The illustration shows an IF CAL setting of 5.7A. The maximum current is 19.9A, setting a higher value than this results in 0A.
NOTE If using an external stack controller, set the switches for one quarter less current than you require, i.e. if you want 12A of field current, set the
switches to 9A. (This allows for a different turns ratio used in the current transformers of external stack modules).
Armature Voltage (VA CAL)
Set this using the 4-way switch, SW7. The switch sets voltage according to the table below. The illustration above shows a VA CAL setting of 200V.
VA Armature Volts VA (Volts)
Switch 150
1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
2 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0
3 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0
4 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
A “1” indicates that the switch is ON.
NOTE Calibration up to 700V is possible with external stacks. Refer to Parker SSD Drives.
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