Invite a Co-worker
Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
Send Invite Cancel
80929members
347076posts

BR550GI noise every 5 seconds

Solved
cptbill_apc
Crewman
Crewman
0 Likes
2
119

BR550GI noise every 5 seconds

This was originally posted on APC forums on 6/23/2013


Hello everyone

I purchased an APC BR550GI 2 days ago to use for my pc.

I hooked it up and and my surprise it make a very annoying buzzing noise with a weird repetitive sound every 5 seconds.

It didnt seem normal to me although the sound could be heard from a distance of about 10m. ( there is a video i shoot with the sound here--> Apc br550gi ups buzzing sound - YouTube )

I thought that i better wait for the battery to be fully charged (although the indication of battery was showing that it was fully charged which i found weird).

Now 24 hours later, the volume is decreased but there is still a weird and repetitive sound every 5 second . Here is a video Ups apc - YouTube

The problem appears even with zero load(nothing plugged into the unit) or with my pc pluggin in.

I really cant stand the noise and doesnt seem right to me. ANy clues? Something i can fix myself? Should i return it?


Accepted Solutions
cptbill_apc
Crewman
Crewman
0 Likes
0
119

Re: BR550GI noise every 5 seconds

This was originally posted on APC forums on 7/4/2013


i understand the buzzing sound that u can hear by going next to the ups, but a buzzing sound that wont let u sleep, watch tv and is more noticable that anything else on a living room and can be heard from 10m??...well, that AINT normal.

Got my replacement unit yesterday from APC and its running quiet. So mine was a faulty unit.

See Answer In Context

2 Replies 2
Battman_apc
Commander
Commander
0 Likes
0
120

Re: BR550GI noise every 5 seconds

This was originally posted on APC forums on 6/24/2013


UPS's sometimes produce mechanical buzzing sounds due to the high operating frequencies of their conversion/inverter stages, coupled with the tap-switching transformers which themselves can vibrate. The repetitive 5 seconds buzz could be a combination of two frequencies that are very close to each other causing a mechanical "beating" (difference frequency) when mixed together, or just some aspect of the UPS design that does some internal process in the conversion or charging circuits on a repetitive basis.

cptbill_apc
Crewman
Crewman
0 Likes
0
120

Re: BR550GI noise every 5 seconds

This was originally posted on APC forums on 7/4/2013


i understand the buzzing sound that u can hear by going next to the ups, but a buzzing sound that wont let u sleep, watch tv and is more noticable that anything else on a living room and can be heard from 10m??...well, that AINT normal.

Got my replacement unit yesterday from APC and its running quiet. So mine was a faulty unit.