Electronic Servo AC Voltage Stabilizers
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Description
The EM and EMS range offers the most cost effective and efficient way to ensure a stable, undistorted mains supply for the vast majority of applications.
Based on the proven electronic servo design, a double wound transformer has its secondary winding connected between the incoming AC supply and the load, with the primary winding voltage controlled by a motor-driven variable auto transformer. A solid-state servo amplifier continuously monitors the output voltage of the stabilizer, and any error voltage is amplified to operate the servomotor of the variable transformer, driving its brush-gear to a point where it is injecting a voltage that will correct the supply voltage by adding or subtracting from it.
Over six thousand models span ratings from 1kVA to 8,000kVA , single or three phase, incorporating full transient spike and noise suppression if required. Available with a wide selection of input voltage ranges from В± 7.5 to В± 40%
Output voltage accuracy: В± 0.5% accuracy maintained over the full range of input voltage variations from zero to full load irrespective of power factor, frequency variations and ambient temperature changes from -5 Deg C to +45 Deg C. Three phase stabilizers will also maintain the accuracy of each phase, both line to line and line to neutral, even if the input voltage. Load and power factor are totally unbalanced.
- Fast response
- Low internal impedance capable of sustaining high surge currents
- Efficiency better than 98% with up to 99.5% on higher models
- Waveform distortion negligible with any type of load
- Frequency 47 to 65Hz
- Soft-Start ensures low output voltage at the moment of switching on
- Soft-Stop dampens the force of impact when the variable transformer brush gear reaches the end stop.
- Full Transverse and Common Mode spike / interference suppression when required.
- Oil Immersed versions for outdoor use or for use in hostile environments.
- Stabilised Output Voltage Can be preset to any value within these ranges
Based on the proven electronic servo design, a double wound transformer has its secondary winding connected between the incoming AC supply and the load, with the primary winding voltage controlled by a motor-driven variable auto transformer. A solid-state servo amplifier continuously monitors the output voltage of the stabilizer, and any error voltage is amplified to operate the servomotor of the variable transformer, driving its brush-gear to a point where it is injecting a voltage that will correct the supply voltage by adding or subtracting from it.
Over six thousand models span ratings from 1kVA to 8,000kVA , single or three phase, incorporating full transient spike and noise suppression if required. Available with a wide selection of input voltage ranges from В± 7.5 to В± 40%
Output voltage accuracy: В± 0.5% accuracy maintained over the full range of input voltage variations from zero to full load irrespective of power factor, frequency variations and ambient temperature changes from -5 Deg C to +45 Deg C. Three phase stabilizers will also maintain the accuracy of each phase, both line to line and line to neutral, even if the input voltage. Load and power factor are totally unbalanced.
Key Features
- Fast response- Low internal impedance capable of sustaining high surge currents
- Efficiency better than 98% with up to 99.5% on higher models
- Waveform distortion negligible with any type of load
- Frequency 47 to 65Hz
- Soft-Start ensures low output voltage at the moment of switching on
- Soft-Stop dampens the force of impact when the variable transformer brush gear reaches the end stop.
- Full Transverse and Common Mode spike / interference suppression when required.
- Oil Immersed versions for outdoor use or for use in hostile environments.
- Stabilised Output Voltage Can be preset to any value within these ranges
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Electronic Servo AC Voltage Stabilizers
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