Voltage Regulator. VR485 Datasheet
( DataSheet : www.DataSheet4U.com )
The VR485 series of voltage regulators controls the output voltage of
400Hz brushless generators. This is accomplished by the regulator
supplying the necessary excitation to the generator field. Two styles are
available. The VR485-100-L enables line drop compensation for voltage
drops induced by large line impedance to isolated loads. The VR485-
100-P allows paralleling of its generator to another power source. Both
features require a 1 Amp CT input. Power transformer BE 25089-001 is
included with these regulators. The transformer will convert 208Vac to the
necessary voltages required by the regulator for proper operation.
• Regulation accuracy better than ±1.0%.
• Frequency compensated.
• Continuous 5 Adc field current limiting.
• Automatic generator line voltage buildup.
• Paralleling or line drop compensation as standard.
• Fast response time (less than 1.5 cycles).
• Applicable on 400 Hz systems.
ROUTE 143, BOX 269 HIGHLAND, ILLINOIS 62249, U.S.A. PHONE 618-654-2341 FAX 618-654-2351
2.5 Adc at 63 Vdc (157.5 W) maximum continuous
3.6 Adc at 90 Vdc (324 W) forcing one minute
Exciter Field DC Resistance
25 ohms minimum
Transformer BE25089-001 supplied with regulator for
208 Vac nominal generator line voltage. 320 Vac,
400 Hz center-tapped, 20 Vac, 400 Hz supplied to
regulator from secondary of transformer
AC Input Sensing
208 Vrms ± 10%, single phase, 400 Hz
Input Sensing Burden
Voltage Adjust Range
187 - 229 Vac. Voltage control by adjust on unit. For
external adjust, use 20Kohm, 2 Watt potentiometer,
Basler P/N 11521 or equivalent
Paralleling CT Input
Nominal 5% droop with 1A CT input (VR485-100-P
Line Drop Compensation
Adjustable from 0 to 15% of the generator voltage
with a 1 A CT input (VR485-100-L only)
CT Burden Paralleling/Line Drop
Better than ± 1.0% no load to full load
1.0% maximum for a 33.3°C (60°F) change in ambient
Approximately 0.66 V/Hz below 380 Hz
Transient Response Time
Less than 1.5 cycles
Excitation Current Limit
Line Voltage Buildup
Provides a minimum of 6 Vdc to the exciter field for
voltage buildup, with as little as 10 Vac residual on
the power transformer primary
40 Watts maximum
-32°C to +60°C (-26°F+140°F)
-40°C to +85°C (-40°F+185°F)
4.0 pounds (1.8 kilograms)