• 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
• 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.
! " • % – 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.
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% – 1 V/Hz with jumper between terminals 6A & 8. 2 V/Hz, with jumper removed.
• 1
2 3 % – Knee frequency adjustable from 45 to 65 Hz.
! " • 4 % – +10% to – 25% if regulator sensing voltage.
• 56
4 % – 10 kohm, 2 W, potentiometer.
• , 4 7 – 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.
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– Internal filter.
• 9 % – Internal provisions for automatic voltage build-up from generator residual voltages as low as six VAC.
• & 56 ! $% – Over excitation protection starts timing at 90 VDC, r5% and takes the output to zero in greater than 30 seconds. – The output can be 125 VDC for greater than 10 seconds.
• – 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.
! " • & ! - % – -40°C (-40°F) to +70°C (+158°F).
• !:% – Withstands up to 20 g in each of three mutually perpendicular axes.
• ; % – 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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NOTICE---Do not operate generator at a voltage greater than 5% above name plate rating. 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 r 1 VAC for 60 Hz (226 r 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.
4
4 'C-,D+ 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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2 3 4 '921@55+ The underfrequency knee can be set for 50 (60) Hz operation as described in the following paragraphs. =7 Adjust the generator frequency for 50 (60) Hz. (7 Adjust the underfrequency potentiometer (UF) fully CCW, or until voltage does not increase with further turning. >7 Adjust the Voltage Adjust for 200 (240) VAC sensing as seen on terminals 20, 22 or 24. )7 Adjust the underfrequency potentiometer (UF) CW until the voltage begins to decrease. <7 Adjust the underfrequency potentiometer (UF) CCW until the voltage just returns to the value set in Step 3. 7 The underfrequency knee is now set just below the nominal operating frequency. Further rotation in the CCW direction will lower the frequency at which underfrequency compensation begins. E7 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
-
10/12 Lead PM Excited with 3Phase Sensing
Illustration 16 Page 36
Notes – page 35
10/12 Lead Self-Excited With 3-Phase Sensing
Illustration 18 Page 38
