by May 10, 2001 0 comments



Some UPSs that participated in the shootout simply refused to take the load. We tested these for voltage regulation and input voltage tolerance. Here are the results

 

 

 

Deltron Intelligent
Type: 1000 VA line-interactive
Price: Rs 8,000
Passed at: 70 percent load
Switchover voltage (max, min): 285 V, 153 V
Voltage regulation: 219-253 V

Microtek Max Power
Type: 1000 VA line-interactive
Price: Rs 9500
Passed at: 60 percent load
Switchover voltage (max, min): 281 V, 134 V
Voltage regulation: 201-247 V

Accu Power SS-Series
Type: 1200 VA line-interactive
Price: Rs15000
Passed at: 70 percent load
Switchover voltage (max, min): 275 V, 171 V
Voltage regulation: 198-241 V

Astro 1000 VA
Type: 1000 VA line-interactive
Price: Rs 8,700
Passed at: 70 percent load 
Switchover voltage (max, min): 285 V, 139 V
Voltage regulation: 201-249 V

Powerin SVA1000
Type: 1000 VA line-interactive
Price: Rs 11,500
Passed at: 70 percent load
Switchover voltage (max, min): 279 V, 149 V
Voltage regulation: 201-242 V

Vintron VIN 1000 (4B)
Type: 1000 VA off-line
Price: Rs 10,700
Passed at: 65 percent load
Switchover voltage (max, min): 274 V, 136 V
Voltage regulation: 203-238 V

 

Last year, we added a new test to our suite to check whether a UPS could handle a load equivalent to its claimed rating. We started with a 100 percent load and reduced it in increments of 5 percent if the UPS failed to sustain it. For example, if a UPS failed at 80 percent, we recharged it and checked it at a load of 75 percent. If it still failed, we reduced the load to 70 percent, and so on. The passing mark was kept at 80 percent. 

For UPSs that went below 80 percent of their rated load, we didn’t perform some of the tests, such as the backup test. This was because they all qualified at different percentages of load. Since we take only 80 percent of the rated load for the tests, the load would’ve had to be readjusted for each of these loads, which didn’t make sense. For example, if one UPS passed at 60 percent of its rated load, and another at 70 percent, then the load would’ve had to be calibrated at 80 percent of each of these respectively. 

Some UPSs simply refused to take the load applied to them during tests. We tested them for their voltage regulation and
input voltage tolerance. The results are in ‘The Other Participants’ section in this story.

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