UPS capacity selection

Posted by sere on October 24th, 2019

Pick the UPS capacity dependent on these aspects, attributes, calculated load, jolt current, peak current, overload capability, and load sudden shift. The payload capability is paid by the next values

1. About urge current

Calculated ability of UPS capable of resisting peak present = payload capability X influence present (max )/rated current of UPS, which will be normally 5-10 times the powerful ability.

The load is set to the power source and creates a substantial jolt present, particularly for computers and peripherals. During UPS power distribution, so as to decrease the capacity of UPS, load is set into or chosen for UPS mains power performance. When the present returns to the rated current value under, the electricity is converted into the rectifier and the inverter is provided.

2. About peak current

UPS capable of resisting peak current

Ability = payload capability X summit current (max )/ranked UPS present;

Peak capacity Is Usually 2 times of powerful capacity;

For UPS using a summit coefficient of 2.5 or above, the peak present bearing capacity is 250 percent PA, which does not exceed the rated capability of UPS and may be directly used without reimbursement.

3. Overload

The overload capability of UPS is normally more than 1.1 days of the successful load.


Many UPS load changes are inside the assortment of 0"100 percent, along with the output signal voltage fluctuation could be controlled over -10%IA. Hence, no reimbursement can be made to its payload capacity.

5. Generator-ups collaboration

In certain regions the UPS switches into a self-evident generator following a power outage. If the self-provided generator provides electricity, it ought to have the ability to supply a massive jolt present when the UPS begins without affecting the functioning of this generator.

By Way of Example, to get a 12 pulse rectifier, the self-provided generator must have double the capacity of this rectifier

2) select a number of sets of UPS for concurrent link and group delay beginning. It may be used with slope beginning function to prevent excessive shock current due to simultaneous beginning of UPS.

3) pick a UPS with rectified charger input electricity and controllable energy, and produce the rectifier charger enter component of electricity, while the inadequate power is offered by battery.

4) select uninterruptible power supply manufacturers with restricted charging current purpose. In other words, the charging may be stopped while the generator is operating, thereby cutting down the total amount of electricity the UPS absorbs in the generator.


About the Author

Joined: June 6th, 2019
Articles Posted: 624

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