VR6 Replaced VR3

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• Replacement for VR3 and VR3F• VR6-B replaced the VR3F in Larne and

Griffin September 1, 2001• VR6-A still in reliability test• VR6-A and VR6-B to replace all VR3s

and VR3Fs

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• VR3(F) designed in 1980s with 1980s technology– components becoming obsolete

– not designed for all the applications

• Supplier contract runs out June 2002• Improvements needed for today’s

marketplace

��• UL508A recognized/ CSA certified

• Knee Frequency Adjustment• Stability Adjustment

• Droop Circuit part of regulator• Same model works with SE and PM

generators

• Operates at engine speed of 500 RPM and above

• Single phase sensing with SE and PMs

• Improved response time

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– Self Excited, 180 to 264 VAC, single phase or three phase, 50/60 Hz.

– PMG, three phase, 90 to 120 VAC, 100 to 240 Hz,3125 VA maximum.

– PMG, single phase, 240 VAC, 100 to 240 Hz, 3125 VA.

• #��!��$!��%&'�� ("– 12 Amps DC @ 65 VDC maximum continuous.– 25 Amps DC @ 125 VDC forcing for 10 seconds.

• � ��"– True RMS three phase or single phase,180 to 264 VAC, 60

Hz; 150 to 220 VAC, 50 Hz.

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– Less than ±1% of voltage setpoint to full load.• ��)��"

– Less than ±1% voltage variation for a 40°C (104°F) change.

• ��*��"– Maximum of 4 milliseconds.

• ��+,-��"– 1 V/Hz with jumper between terminals 6A & 8. 2 V/Hz, with

jumper removed.

• .��/�0��"– Knee frequency adjustable from 45 to 65 Hz.

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– +10% to – 25% if regulator sensing voltage.

• 23��1��"– 10 kohm, 2 W, potentiometer.

• ��)��1��4– 1 A or 5 A CT, less than 10 VA burden.– Internal CT burden resistor.– Adjustable from 0 to 10%, at rated current, 0.8 power factor.

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– 50 W maximum.

• 25��"– Internal filter.

• �� 6�"– Internal provisions for automatic voltage build-up from

generator residual voltages as low as six VAC.

• #��23��!�"– Over excitation protection starts timing at 90 VDC, �5% and

takes the output to zero in greater than 30 seconds.

– The output can be 125 VDC for greater than 10 seconds.

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– UL Recognized per Standard 508, UL File NO. E97035.– CSA Certified per Standard CAN/CSA-C22.2 No. 14-95, CSA File No. LR

23131.• �� Conforms to:

– Radiated Emissions EN50081-2.

– Radiated Immunity:

• Electric field EN61000-4-3 (10 V/m).

• Conducted EN61000-4-6 (10 VRMS).

• Conducted Emissions EN50081-2 (EN55011, Class A).

• ESD Immunity EN50082-2 (4 KV contact, 8 KV air).

• EFT Immunity EN50082-2 (2 KV coupling clamp).

• Magnetic Immunity EN50082-2 (30ARMS, 50 Hz).

• Safety: EN61010-1.

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• #��*��"– -40°C (-40°F) to +70°C (+158°F).

• ��7"– Withstands up to 20 g in each of three mutually

perpendicular axes.

• ��8��"– Withstands the following accelerations at the stated

frequency:• 0.5 g; 18 to 2000 Hz.

• ��"– Approximately 1.1 kg (2.5 lbs.).

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Is made for parallel operation so that all generators will have thesame % reactive voltage droop.

NOTICE---Do not operate generator at a voltage greater than 5% above name plate rating.

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The factory calibration adjustment (FAC CAL) should be used by factory technicians only. The following procedure can be used if the factory calibration has been disturbed:

With the voltage regulator operating on a generator, adjust the calibration potentiometer fully ccw and the voltage adjust potentiometer fully cw. Adjust the calibration potentiometer cw until the generator voltage is 252 � 1 VAC for 60 Hz (226 � 1 VAC for 50 Hz) . Adjust the voltage adjust ccw and verify the generator voltage is between 156 and 180 VAC. The unit is calibrated and the calibration potentiometer can be sealed.

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1. Installation of a jumper across terminals 4 and 7 allows the internal (front panel) VLT ADJ adjustment to vary the generator nominal voltage over the operating range.

2. Remove the jumper between terminals 4 and 7 and connect a 10k ohm external voltage adjust potentiometer across terminals 6A and 7 to allow operation of the external voltage adjust potentiometer. The internal voltage adjustment should be set fully CW for proper operation of the external adjustment.

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The underfrequency knee can be set for 50 (60) Hz operation as described in the following paragraphs.:4 Adjust the generator frequency for 50 (60) Hz.%4 Adjust the underfrequency potentiometer (UF) fully CCW, or until voltage does not increase with further turning.;4 Adjust the Voltage Adjust for 200 (240) VAC sensing as seen on terminals 20, 22 or 24.&4 Adjust the underfrequency potentiometer (UF) CW until the voltage begins to decrease.94 Adjust the underfrequency potentiometer (UF) CCW until the voltage just returns to the value set in Step 3.�4 The underfrequency knee is now set just below the nominal operating frequency. Further rotation in the CCW direction will lower the frequency at which underfrequencycompensation begins.B4 Connecting a jumper from terminal 8 to terminal 6a will provide an underfrequency slope of 1 V/Hz. No connection to terminal 8 will result in an underfrequency slope of 2 V/Hz.

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Illustration 15 Page 33

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10/12 Lead PM Excited with 3-Phase Sensing


Notes – page 35

10/12 Lead Self-Excited With 3-Phase Sensing


Documents

VR6 Replaced VR3