Eurotherm Drives 590 DRV Digital, Product Manual, Page: 35 / 318

Chapter 3 Installation and Wiring
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3
590 DRV Digital DC Drive Product Manual
3. Set the field current to the motor's nameplate rating. Field current is set in units of amps, using
the right three rotary switches for tens, ones, and tenths. As with armature current, the range
depends on the type of drive. The overall range is from 0.1 - 19.9A with 590 DRV Digital
drive models. Turn the rotary switches to the appropriate setting for your motor. Figure 3.9 is
set for a 8.4 amp field. Use SETUP PARAMETERS:: CALIBRATION:: FIELD I CAL in the
MMI.
NOTE. Some motors list two field currents. Always choose the "hot" field current when
calibrating the drive.
WARNING!
The field current settings must match the motor nameplate rating value or the motor
could overspeed and lead to mechanical damage and/or injury to personnel.
WARNING!
Do not exceed the field circuitry rating of the controller when setting the field current.
590 DRV Digital drives through 270 amp armatures are limited to 10 amp fields. Drives
up to 675 amp armatures have field circuitry rated to 20 amps. Above 675 amps, the
controllers have 30 amp field circuitry.
Control Transformer
The 590 controller within the DRV derives its control power through a DRV mounted control trans-
former connected to one phase of the incomming main three phase power. This transformer must be
tapped to match the incoming supply voltage. Models rated 7.5 through 100 HP accept 208/230/380/415/
460 volts AC, 50/60 Hz supplies. The default connection is for 460 volts. When other supplies are used,
move the wire at position H6 to the position for the desired voltage, as shown in left of Figure 3.11.
For models rated 125 through 900 HP, the control transformer primary supply is limited to 230/460
VAC and are shipped with the tap set for 480 VAC. These drives are shipped with two sets of primary
fuses (F4 and F5). For 230 volt supplies, use the loose fuses provided with the DRV and tap the
primary of the tansformer as shown in the right of Figure 3.11.
Set Field Current
Check Transformer
Tap Against
Supply
Use Loose Supplied
Fuses for 230 VAC
Supply
▼
Figure 3.11 - Control Transformer Settings