How are the starting capacitors or AC capacitors designed?
They are generally made of metallized polyester so they have a high insulation resistance and the ability to withstand surges and self-regenerate, not without this at the cost of suffering slight variations in their capacity. They do not have polarity.
A start capacitor or start capacitor is an electrical element that alters the current in one or more windings of a single-phase AC motor by creating a rotating magnetic field.
What is the unit of measurement for an starting capacitors or AC capacitors?
The unit of capacitance of these capacitors is the microfarad represented on the capacitor by one or more numbers followed by µF or uF. Old capacitors may be labeled with the outdated terms "mfd" or "MFD", which also mean microfarads.
Where are the starting capacitors or AC capacitors used?
The starting capacitor is used, for example, in air conditioners, fans. jacuzzi, spa pumps, automatic doors, forced air heat furnaces, compressors, etc.
What relationship between the starting capacitors or AC capacitors with power factor and cos ϕ?
In order to compensate the power factor and cos ϕ in electrical installations, lighting,... they are also used. Power factor is the ratio of active power and apparent power.
In linear loads this power factor (p.d.f.) and cos cos ϕ coincide, but in switched loads they do not.
Non-linear loads create harmonic currents that generate a harmonic distortion rate that in turn generates losses in the lines, a decrease in available power, and the need to increase the section of the cables due to voltage drop. This is why we find it necessary to compensate the power factor and cos ϕ with the use of banks of capacitors and coils that generally switch automatically.
