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Smart UPS reporting wrong output frequency

PdeLad_1_apc
Cadet
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2
141

Smart UPS reporting wrong output frequency

This was originally posted on APC forums on 11/14/2020


I have a Smart-UPS SRT 5000 and it is reporting the wrong output frequency (58.4 Hz) while it is at 60 Hz and in phase with the utility.  The frequency value is slowly decreasing with time since the beginning of 2020.  The output voltage is indicated correctly.  The UPS is now configured to output at 60 +/- 0.1 Hz and the bypass set to ''Phase lock Not Required'' as I was getting messages it cannot bypass.

What could be the reason for this behavior and is there something I can change to eliminate this issue.

Thanks

2 Replies 2
BillP
Administrator Administrator
Administrator
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141

Re: Smart UPS reporting wrong output frequency

This reply was originally posted by Gavan on APC forums on 11/16/2020


Hi Denis,

Have you checked the input frequency?

-Gavan

PdeLad_1_apc
Cadet
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0
141

Re: Smart UPS reporting wrong output frequency

This was originally posted on APC forums on 11/17/2020


Yes, it is 60 Hz