Answer / vid

capacitor charges and discharges exponentially. Its use in
ups is to store the charge and discharge a constant current.

Answer / rakeshkumar1017

there are two capacitor which are use to following.
1:- Reduce the harmonic loss.
2:-AC and DG cap use pure filtration of AC & DC supply.
3:-AC Cap use for PF control

Answer / matrix

There are 2 type of capacitor used in ups system,
DC capacitor is uesd in reduce the effect of harmonic like
5th harmonis.(5 th harmonic create more consumption)

ac capacitor increase the power factor value of ups system

Answer / harpreet singh

yes above ans er is right

Answer / nagesh.patwari

Not All UPSs Must Have Input Harmonic Filter Capacitors
Though almost all UPS systems use capacitors in their output, one UPS topology demonstrates that reliance on capacitors in the input is not required. Delta Conversion UPS configurations are now gaining wide acceptance as a means to assure maximum compatibility and stability of engine generators without adding large input capacitor-based harmonic filters.

Instead, this design applies two bidirectional power converters so that the primary delta converter acts like an active harmonic filter, maintaining less than 5% THD current distortion from no load to full load, without the use of capacitor-based filters. The UPS maintains power factor at an ideal unity PF, never falling leading or causing voltage problems on the generator.

The double conversion UPS consists of a one-direction rectifier/battery charger driving a one-direction inverter that powers the critical load.

The two converters of the Delta Conversion UPS are bidirectional, enabling the UPS to aid in the engine-generator's stability. These two converters are controlled so that, as a load, the delta conversion is a constant unity power factor load of a sine wave form from no load to full load And, the Delta Conversion UPS achieves this ideal unity power factor and low input harmonic distortion without the need of a large input capacitor bank.

Both capacitors I/p and o/p - AC AND DC Capacitor in UPS ARE USED FOR VTG FILTRATION OR SMOOTH OUTPUT POWER

Answer / nagesh.patwari

UPS systems also contain large banks of both DC electrolytic and AC polymeric film capacitors that degrade with time. The function of capacitors within the UPS is to filter out electrical fluctuations and provide clean power to the equipment being protected called “Supply Voltage Filtering” They are not static electrical components that operate in a circuit. Their design life is a mathematical function of manufacturers’ rated voltage, the voltage actually applied, the current running through them, ambient temperature, and thermal resistance. For all practical purposes, estimating service life would be based on manufacturers’ rated voltage combined with the device’s operating temperature.

Commonly at 7 year's service life span capacitor expires.

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