• Single phase Electronic Energy Saver 'ENSAVE' is basically designed and applicable to single phase supplied loads or instruments. Its major application is to save electrical energy up to 15% to 25% depending upon the loads. It also protects electrical appliances from all type of electrical fluctuations, like under / over-voltage etc. Thus it also acts as a protector. It is widely used in domestic and commercial purposes.

• Percentage saving differs from load to load. If the load is more inductive, saving is more. For resistive loads, saving is less as compared to inductive one. For instance loads like Irons, Geyser, Heaters, Bulbs all are resistive load whereas fans, motors, tubes, Air-conditioners, Fridges etc. all are inductive load. Thus for inductive loads, 'ENSAVE' saves above 20% energy while for resistive loads it gives up to 15% saving in energy.

• ENSAVE basically works on the principle of 'On line monitoring and controlling of power factor' of load. The technology used in ENSAVE is fully researched and developed by M/s. Ascent Power Systems and it has taken eight exhaustive years of research and hard work to come up with such a technology. ENSAVE uses the embedded software for monitoring and controlling of power factor. This software is fully protected from any copy right or read operation, so it has a high degree of secrecy.

WAVEFORMS: Angle Alfa gives firing, which is the actual advance or phase shifting of voltage cycle called chopping but here we are using very good harmonic filters, which suppress the harmonic produced due to chopping. This part would include the equations that were provided as well.

% Saving calculations

• As we know that Energy meters are driven on the following formula :
  No. of units consumption = KWH
  KWH = V.I. COS Ø T/1000
  In above Equation:
  V = Coming supply voltage
  I = Load current
  T = Period
  COsØ = Power factor
  KWH means kilo watt-hour
  i.e. 1000 for k, V.I COsØ for Watt, T for Hour
• Now,
  As per MSEB billing, power factor is 0.8, for 1 hour duration
  V = 230, I = 10 Amp, then
  kWh = 230 x 10 x 0.8 x 60 (In minutes)/1000
  = 110.4 units per hour or per 60 minutes
• Now after installing ENSAVE current decreases considerably and thus reduces the reactive power i.e. Wattless power.
• Also, there is more energy consumption for high reactive power loads, mainly inductive loads like motor, transformers, chokes, compressors etc., which also increases the distribution losses on the source side i.e. on MSEB's side.
• ENSAVE decreases the reactive power and ultimately saves in terms of number of units consumed as shown in the next slide.
• Now, after installation current decreases to 20% of actual consumption as well as voltage in similar ratio of % reduction.
• So now: V becomes 215 Vac in place of 230 vac direct
  I become 7 amps in place of 10 amps
  PF becomes 0.90 in place of 0.80
  Now kWh = COsØ x P/1000
  = 215 x 7 x 0.90 x 60/1000
  = 81.27 units per hour or per 60 minutes.
  Actual saving = Direct consumption - saving mode consumption
  = 110.4 - 81.27 = 29.13
  % saving = 29.13 x 100/110.4 = 26.38%
  This % saving increases as PF increases towards unity depending on the nature of load applied on ENSAVE.