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4. Selection of stabilizer power.
Stabilizer overload is not allowed!
Please calculate carefully the stabilizer load with required power reserve
before the commencement of operation. For the calculation of the value of this
power reserve, please remember the following:
The total power is a power, consumed by electrical appliance, which
consists of active and reactive power (depends on the type of load). The active
power is always specified in kilowatts (kW), the total power-in volt-ampere (VA).
Power consumer devices always have both, active and reactive loads.
Active load. Here all consumed energy is transformed to heat. Some
devices have this component as a basic. For example: glow lamps, heaters,
electric stoves, irons, etc.
Reactive loads. This is all others. Reactive component of power doesn't
perform effective power, it serves for generation of magnetic fields in the
inductors, circulating all time between a source and the consumer.
Stabilizer power is given in kilovolts-amperes (kVА), but power
consumption is given in kilowatts (kw) most of the time. These two values are
connected between each other by the power factor cos
φ
;.
kVа = кW/cos
φ
;
Total power is a product of voltage and load current output:
For a single-phase load:
кВа= (load voltage =220V) х (load current output)
If it’s difficult to find a cos
φ
for the given network, please measure the load
current output for the calculation of necessary stabilizer power.