
Trips and Fault Finding
7-3
590+ Series DC Digital Converter
Adaptor Board Current Calibration Switch (Frame 3)
NO POWER IS CONNECTED AT THIS STAGE
View the switch with the terminal cover removed:
IA CAL - Armature Current Calibration Switch
This switch is always set to "1" (ON).
Power Board Current Calibration Switches (Frames 4 & 5)
NO POWER IS CONNECTED AT THIS STAGE
View the switches with the drive door open:
IA CAL – Armature Current Calibration Switch (SW1)
This switch is always set to LO on Frame 4 & 5 drives of 500A or
less, and HI for drives greater than 500A.
IF CAL – Field Current Calibration Switch (SW2)
This switch is always set to HI for Frame 4 & 5 drives. The
maximum field current calibration is 30A.
Power Board Current Calibration Switches (Frame H)
NO POWER IS CONNECTED AT THIS STAGE
To access the power board remove the terminal cover, unscrew the two fixings on the right hand
side of the control door. Open the door to reveal the power board.
Power Board
Calibration Switches
ON
OFF
9
SW7
SW8 - 9
1 = ON
0 = OFF
SW10
SW1 - 6
Armature Current Calibration
500A stages (factory setting = 2000A)
Reserved (factory setting = ON)
8
0
0 x 1 up to 20A (factory setting)
0
1 x 2 up to 40A
1
0 x 3 up to 60A
1
1 x 4 up to 80A
OFF = VA / 100 (for VA up to 875V) (factory setting)
Field Current Calibration
Multiplier Field Current Range
Armature Voltage Calibration
(not used on standard build)
1 2 3 4 5 6
8 9 10
7
thus switches 1 to 4 = ON
Figure 7-1 Calibration Switches
Power Board
SW2
SW1
HI
LO
HI
LO
IF CAL
IA CAL
1
OFF