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.

HOW TO CALICULATE THE LEAD ACID BATTERY AH AND HOW TO FIND THE 1.2KVA UPS BACKUP @ 1000WATTS LOAD?

2 Answers  

we have two 11/.433 kv. distribution Transformer rating as 1000 kva & 500 kva , i wants to run parallel both transformer. both transformer impendence voltage is 5.24%, How can we run both t/f, & how sharing the load

3 Answers  

What is Synchronization of generator,where and how it is achieved.

1 Answers   HEC,

what is power factor?

3 Answers  

What is the function of UV coil ACB?

6 Answers   DLF,

how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

0 Answers  

Why, the starting current of 3 phase Induction Motor is 7 to 8 times its rated current?

9 Answers   L&T,

what is transformer

7 Answers   Hofincons,

In which connection the voltage will be more , in star or delta connected motor?

3 Answers  

Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?

0 Answers  

Is it posssible to obtain the higher speed(3000rpm) for adiferentiallly cascaded induction motors(with 8 and 6 poles)

3 Answers  

What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.

0 Answers