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UPS uninterruptible power supply time calculation

DATE:2019/6/24 14:17:52 HITS:244

UPS power use to a set of strict and scientific operating procedures: 

(1) UPS power supply places should be placed away from direct sunlight, and allow sufficient ventilation space, at the same time, it is prohibited in UPS output port connected with the emotional load. 

 

(2) the use of a UPS power supply, you should be sure to comply with the relevant provisions of the manufacturers of the product specification, guarantee attached to the FireWire zero line, the ground to meet the requirements, the users are not free to change the order in which their mutual. For example, an American brand of UPS power supply AC input wiring of the AC input socket connection is just the opposite. EAST <Oriental three-phase UPS need to pay attention to the phase sequence, phase sequence otherwise false alarms, the same is true of other brands. 

 

(3) for, avoid sudden load plus or sudden load shedding, UPS power supply voltage output fluctuations, leaving the UPS power not work in strict accordance with the correct boot and shutdown sequence. 

 

(4) prohibit frequent closing and opening of the UPS power supply, the general requirements for UPS power supply is turned off, wait at least 6 seconds to turn on the UPS power, UPS power might otherwise enter the state failed to start ", and that the UPS power into neither electricity output, nor the state of the output of the inverter. 

 

(5) prohibits the ultra-load use, recommended by the manufacturer: the best UPS power supply maximum starting load control 80% If you use the overload, the inverter state, often breakdown inverter transistor. Practice has proved that: For the vast majority of UPS power load control in 30% to 60% of the rated output power range is the best work. 

 

(6) UPS power supply on a regular basis for maintenance work: clear the dust inside the machine, to measure the voltage of the battery pack, replace the failed battery, check the fan operation and testing parameters regulating the UPS system. 

Battery life calculation 

 

Battery life is mainly affected by the load size, battery capacity, ambient temperature, battery discharge cutoff voltage factors. General calculation UPS battery time, we can calculate the battery discharge current, the discharge time is then detected according to the battery discharge curve. Battery discharge current can be calculated by the following empirical formula: 

Discharge current = average power factor / battery discharge voltage UPS capacity (VA) × × efficiency 

To calculate the actual load discharge time, simply change the UPS capacity for the actual load capacity can be.

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