EM / EMS Performance
Stabilised Output Voltage
Can be pre-set to any value within these ranges:-
H Models L Models
200 to 254 V single phase 100 to 127 V single phase
346 to 440 V three phase 173 to 220 V three phase
Other voltages to order.
Output Voltage Accuracy
±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 -15 deg C to +45 deg C.
Three phase stabilisers 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. If a lower accuracy of ±5% is adequate for your equipment needs, then the upper and lower input voltage swing maybe extended by 5% beyond the figures quoted for the higher accuracy.
Input Voltage Range
The input voltage range is shown as a percentage of the pre-set output voltage. The EM models offer a choice of 9 standard ranges
(R8 to R30) and 3 taps A, B and C. While the EMS models are available with a single tap with equal under and over voltage correction. The taps can be altered at any time but not the range.