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VDT/3000 Family

VDU/3000 Family
Home › Products › StabilizersThree-phase electronic stabilzersVDU/3000 Family

Three-phase electronic stabilizer

VDU/3000 Family - Megadigistab

Three-phase digital controlled stabilizer with independent regulators
on each phase without neutral

  • Three-phase digital controlled stabilizer
  • Input voltage 400 V ± 15% + N
  • Output voltage 400 V ± 1% + N
  • Frequency 50/60 Hz ± 2%
  • Totally static control
  • Patented regulating system
  • Input/Output on clamps
  • Magneto-thermal or fuse power protected
  • VDU/3003 family features phase voltage readout with 3 digit digital display
  • Input/Output LED switchover pushbutton
  • Ambient temperature –20 +40 °C
  • Waveform null distortion < 0,1 %.
  • Unaffected by power load factor
  • Speed response 9 ms/V
  • Resistant to surge overloads 5 In. approx.
  • Efficiency from 89 to 98 %

The VDU/3000 Family, or Megadigistab, are part of the new AC/DC generation of stabilizers. 
This particular family does not have mechanical parts, thus free of movement wear, and presenting a high level of reliability and efficiency  It also maintains the quality of the regulating system with booster transformers.
The control is powered by a sophisticated microchip and simple and reliable hardware, thus allowing VARAT to design a fast, silent maintenance free machine, with very high power levels, which can reach 1,5 MVA.
The digital and static control constantly balance the input power and stabilizes the output.
This family also features a high speed response, swing free, high precision and overload free at the moment of turning on. The speed response is approx. of  9 ms/V, according to CEI 562-4 e IEC 686 standards.
The advantage of this patented system is to be able to obtain a completely static stabilizer, with reduced dimensions, insensitive to surge overloads and which corrects the output in an almost continual manner, as the electromechanical units.
This value is already very low, but also slowed down as not having to be continually regulated, caused by variable power surges.
Waveform null distortion, and thus resistant to power overloads up to 5 In..
Megadigistab, when turned on, reads and shows the voltage power and brings it to the correct preset value.
The input/output connections are on clamps or bars, depending on the power and magneto-thermal or fuse power controlled against overloads and short-circuiting. .
It also features a step-type conditioning, where the lowest level for a power voltage of 230 V is 2,3 V (1%)
The three phases are controlled separately and have a neutral reference, which is automatically created, if non present in the network, thanks to a particular auto transformer, which can face high unbalanced loads.
The control and regulating system are a VARAT patent and are used for all single and three-phase stabilizers.

Reference Number Power Input Power Output Power Nom. Curr. Dimensions Weight Kg
L W H
VDU/3001 1,5 kVA 400 V ±15% 400 V ±1% 2,2 A 300 200 500 27,5
VDU/3002 3 kVA 400 V ±15% 400 V ±1% 4,3 A 400 250 600 42,9
VDU/3003 6 kVA 400 V ±15% 400 V ±1% 8,7 A 500 250 650 61,5
VDU/3004 9 kVA 400 V ±15% 400 V ±1% 13,0 A 500 250 800 76,6
VDU/3005 12 kVA 400 V ±15% 400 V ±1% 17,3 A 600 250 800 90
VDU/3006 15 kVA 400 V ±15% 400 V ±1% 21,7 A 600 400 1000 105
VDU/3007 20 kVA 400 V ±15% 400 V ±1% 28,9 A 600 350 1400 149
VDU/3008 25 kVA 400 V ±15% 400 V ±1% 36,1 A 600 350 1400 171
VDU/3009 30 kVA 400 V ±15% 400 V ±1% 43,3 A 600 350 1700 215
VDU/3010 50 kVA 400 V ±15% 400 V ±1% 72,2 A 600 350 1700 239
VDU/3011 75 kVA 400 V ±15% 400 V ±1% 108 A 800 600 2000 285
VDU/3012 100 kVA 400 V ±15% 400 V ±1% 144 A 1200 600 2100 315
VDU/3013 125 kVA 400 V ±15% 400 V ±1% 180 A 1400 600 2100 375
VDU/3014 150 kVA 400 V ±15% 400 V ±1% 216 A 1400 600 2100 405
VDU/3015 200 kVA 400 V ±15% 400 V ±1% 288 A 1600 600 2100 580
VDU/3016 250 kVA 400 V ±15% 400 V ±1% 360 A 2000 800 2100 650
VDU/3017 300 kVA 400 V ±15% 400 V ±1% 433 A 2400 800 2100 1100
VDU/3018 400 kVA 400 V ±15% 400 V ±1% 577 A 2600 800 2100 1230
VDU/3019 500 kVA 400 V ±15% 400 V ±1% 721 A 2600 800 2100 1450
VDU/3020 600 kVA 400 V ±15% 400 V ±1% 866 A 3000 800 2100 1850
VDU/3021 800 kVA 400 V ±15% 400 V ±1% 1.154 A 3200 800 2100 2250
VDU/3022 1 MVA 400 V ±15% 400 V ±1% 1.443 A 3800 800 2100 3200
VDU/3023 1,25 MVA 400 V ±15% 400 V ±1% 1.804 A 4800 800 2100 3330
VDU/3024 1,5 MVA 400 V ±15% 400 V ±1% 2.165 A 5400 800 2100 4250

Patented System No.01309253 - No. 00109610.6

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