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VR485 SERIES
VR485 SERIES VOLTAGE REGULATOR
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 VR485100-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.
FEATURES
* 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.
SPECIFICATIONS page 2
CONNECTIONS page 3
DIMENSIONS page 4
www..com ROUTE 143, BOX 269 HIGHLAND, ILLINOIS 62249, U.S.A. PHONE 618-654-2341 FAX 618-654-2351
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VR485 SERIES
SPECIFICATIONS
ELECTRICAL Power Output 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 Power Input 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 2 VA 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 only) 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 2VA Regulation Accuracy Better than 1.0% no load to full load Temperature Stability 1.0% maximum for a 33.3C (60F) change in ambient temperature Frequency Compensation Approximately 0.66 V/Hz below 380 Hz Transient Response Time Less than 1.5 cycles Excitation Current Limit 5 Adc 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 Power Dissipation 40 Watts maximum PHYSICAL Operating temperature -32C to +60C (-26F+140F) Storage temperature -40C to +85C (-40F+185F) Weight 4.0 pounds (1.8 kilograms)
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VR485 SERIES
INTERCONNECTION
Figure 1A - Typical Interconnect of VR485-100-L, P/N 92482111, for isolated load (line drop) applications.
Figure 1B - Typical Interconnect of VR485-100-P, P/N 92482110, for generator paralleling.
NOTES: Current transformer and external adjust rheostat supplied by customer. Transformer BE25089-001 is included for use with both voltage regulators and is supplied with them. 3
VR485 SERIES
DIMENSIONS
Figure 2 - Outline Drawing VR485-100-L, P/N 9248200111 (shown), or VR485-100-P, P/N 9248200110.
Figure 3 - Outline Drawing for Transformer BE25089-001. NOTES: 1) For optimum cooling of the regulator, it is recommended that the regulator be mounted vertically. Refer to outline drawings. 2) All dimensions are in inches (millimeters).
ROUTE 143, BOX 269, HIGHLAND, ILLINOIS U.S.A. 62249 P.A.E. Les Pins, 67319 Wasselonne Cedex FRANCE PHONE 618-654-2341 FAX 618-654-2351 PHONE (33-3-88) 87-1010 FAX (33-3-88) 87-0808 http://www.basler.com, info@basler.com
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