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FAQs
1. In which cases the energy saving is possible with the help of Variable Frequency Drive?
  The energy saving is possible and is of significance only in the following case:
 
  • The Variable Frequency Drive is used for operating variable torque load like fans, blowers and pumps.
  • It is possible only if the fans, blowers and pumps are working at their partial capacity and not at full capacities.
  • It is of significance if Variable Frequency Drive is operating high power load i.e. beyond 20HP, at low power loads like 1HP to 20HP the energy    consumption is already less and is of less significance.
  • The energy is significant only if the connecting equipment works for considerable operating hours in a year.
  • Energy is one of the most rare resource and variable frequency drive play a major role in energy conservation. You can save energy with VFD when you want to save power coming from regenerative loads .
  • The pressure drop created because of low RPM operation of fans, blowers and pumps should be tolerable to the system.
  • Amtech is leading company who is selling one of the best AC Motor Drives in Gujarat, India.
  • There are very few electronics company who manufacture VFD in India. Variable frequency drive is also known as Adjustable Speed Drive.
2. How much energy saving is possible?
 
The energy saving in case of fans, blowers and pumps is possible to the extent of 30 % to 60% depending upon the operating point, no. of hrs. per year and the pressure drop tolerable to the system. In case of compressor the energy saving to the extent of 15 to20% is possible depending upon the loading - unloading cycle and operating hrs. per annum of the compressor.
3. How energy is saved in case of compressor by using Variable Frequency Drive?
 
The Variable Frequency Drive reduces the no load losses of the compressor motor by reducing the unloading time of operation. It reduces the pressure difference between high cutout pressure and low cut-in pressure by precise speed control of compressor motor and by using PID controller.
4. What countermeasures are provided against instantaneous power failure?
 
The VT-240S incorporates a regeneration power ride-through control and auto-restart function, so that it does not trip in case of an instantaneous power failure. Regeneration power ride-through control Continues operation during instantaneous power failure using regenerative energy. You can keep operating the motor without tripping in case of an instantaneous power failure by taking advantage of this function.
5. Can I connect the power factor improvement capacitor at the input or output of the inverter?
 
No, You cannot connect power factor improvement capacitors at the inverter's input or output end. Output capacitors can generate high currents containing high frequency components, resulting in the inverter tripping because of over current. This can also have adverse effects on the capacitors. To improve the power factor, insert an input AC reactor (optional) on the inverters input side.
6. Where can we connect brake motor?
 
We can connect brake motor's circuit to the inverters power supply side because if the braking circuit is directly connected to the inverters output terminals, the brake cannot be released because of the lowered starting voltage.
7. What is multi-pump control feature?
 
Multi-pump control refers to operating up to six pumps (one variable speed control pump, and up to five ON/OFF control pumps) in parallel using five relay outputs provided in the inside of one VT240S. The pressure in the glow passage is controlled to be constant. The pressure step of the ON/OFF controlled pumps is interpolated by a pump which is controlled by the VT240S Variable Frequency Drive, which has the PID control function. This maintains the pressure's continuation. The relay output used for the pump's ON/OFF control are the VT240S standard relay output and the relay interface option relay output.
8. What is Inverter?
 
If load is regenerative as in case of Centrifugal lift, Triton drive, Paper industry, wire - winding then one can use PWM converter or active front - end converter at the input of inverter to make a four quadrant drive.
9. What is Soft Starter?
 
Soft starter is also called as solid state starter as it does not use any moving part such as contractor, relay, moving wipe and so on, which may be used in star delta starters.
10. Medium voltage Drive(MVD)?
 
Our company is best known as Medium voltage Drive manufacturer in India. Multi cellular technology is used in medium voltage drive. They have advantages such as modular construction use of standard IGBT and low voltage VFD. If you are looking for MV - VFD in Gujarat then our company - Amtech Drive is the best place for these products.
11. What is Scaler drives?
 
Scaler drive can satisfy 95% of the total application of variable or adjustable frequency drive.
12. What is Vector Drives?
 
Only about 5% of the total application which require very fast control of torque and speed require the vector drive.
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