Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Notifications
Login / Register
Community
Community
Notifications
close
  • Forums
  • Knowledge Center
  • Events & Webinars
  • Ideas
  • Blogs
Help
Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Sustainability
Sustainability

Ask Me About Webinar: Data Center Assets - Modeling, Cooling, and CFD Simulation
Join our 30-minute expert session on July 10, 2025 (9:00 AM & 5:00 PM CET), to explore Digital Twins, cooling simulations, and IT infrastructure modeling. Learn how to boost resiliency and plan power capacity effectively. Register now to secure your spot!

BR1500G ups causing my power supply to buzz only when running on batteries inquiry

APC UPS for Home and Office Forum

Support forum to share knowledge about installation and configuration of APC offers including Home Office UPS, Surge Protectors, UTS, software and services.

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
  • Home
  • Schneider Electric Community
  • APC UPS, Critical Power, Cooling and Racks
  • APC UPS for Home and Office Forum
  • BR1500G ups causing my power supply to buzz only when running on batteries inquiry
Options
  • Mark Topic as New
  • Mark Topic as Read
  • Float this Topic for Current User
  • Bookmark
  • Subscribe
  • Mute
  • Printer Friendly Page
Invite a Co-worker
Send a co-worker an invite to the portal.Just enter their email address and we'll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel
Invitation Sent
Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close
Top Experts
User Count
BillP
Administrator BillP Administrator
2151
Teken
Spock Teken
101
voidstar_apc
Janeway voidstar_apc
83
View All

Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Back to APC UPS for Home and Office Forum
MikePer
MikePer
Cadet

Posted: ‎2023-10-27 05:58 AM . Last Modified: ‎2023-10-27 06:34 AM

0 Likes
1
511
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: ‎2023-10-27 05:58 AM . Last Modified: ‎2023-10-27 06:34 AM

BR1500G ups causing my power supply to buzz only when running on batteries inquiry

Hi,

 

I've seen a couple of posts related to this topic but i wanted to confirm a couple of things that i didn't see in those other posts. I've a BR1500G UPS for over a year now.

 

According to the product page on amazon the APC BR1500G UPS is compatible with Active PCF power supplies and i'm unsure if this is related to specific power supplies since i had a RM850x and never had the issue at hand, but when i changed to a HX1000i the issue appeared. This happened overnight without moving the UPS or making any changes to it, but barely changing the computer since i just did a slight upgrade for the near future when i make a more significant upgrade on the computer (changing the GPU).

 

The computer now or in the near future will still pull around 850 watts so i really want to keep using this UPS just for surge protection and gracefully shutting down my pc when a power outtage happens.

 

My questions are: Why is the buzzing noise from the power supply started to happen? Is it because the current power supply is digital as opposed to the previous one which was mechanical? Can this struggle of the power supply when running on the UPS's batteries harm it if it's just used for about a minute or so? Isn't BR1500G a pure sine wave ups or that only applies to the SMART models?

 

And a final question is can the progammable mode for high sensitive equipments on the UPS be helpfull for this scenario?

 

Thanks in advance

 

 

Labels
  • Labels:
  • Home & Office - UPS & Software
Reply

Link copied. Please paste this link to share this article on your social media post.

  • All forum topics
  • Previous Topic
  • Next Topic
Reply 1
Teken
Spock Teken
Spock

Posted: ‎2024-02-07 10:45 AM

0 Likes
0
427
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: ‎2024-02-07 10:45 AM

Some insight and clarification as it relates to your question and problem. The APC BR1500G UPS you have in use outputs a modified (Stepped) sine wave - Not pure sine wave. The UPS is rated to output a maximum of 865 watts and based on your reply is at the peak of this units capability.

 

Like a regular 120 / 240 VAC circuit in your home its designed to sustain a continuous 80% load. The remaining 20% is intended for overhead to avoid the copper wiring in the wall from over heating and causing a fire. A UPS should be sized with no less than 30% extra power for the expected runtime when called to duty on battery power.

 

One thing that needs to be called out is the terrible marking by everyone in the UPS industry. Every UPS maker uses the VA rating vs Power rating to sell their wares. If you look at any so called 1500 VA UPS you'll note they all vary in (Power Output)??? đŸ˜–

 

That is because the VA has no direct relationship to power . . .

 

That is dictated by the topology, battery chemistry, and how efficient the overall design is! â˜ď¸ You can literally find ten units with a 1500 VA rating and their power output will vary from 700 - 1400+ watts! Regardless, as you noted sensitive electronics don't like modified sine wave and will react by making noises, heating up, to just acting odd.

 

Lastly, the sensitivity option is to tell the UPS to transfer to battery power more or less often based on how *Dirty* the incoming power is. Setting it to low, med, high, also impact the longevity (service life) of the battery cells and how often they need to be replaced.  

 

 

Reply

Link copied. Please paste this link to share this article on your social media post.

Preview Exit Preview

never-displayed

You must be signed in to add attachments

never-displayed

 
To The Top!

Forums

  • APC UPS Data Center Backup Solutions
  • EcoStruxure IT
  • EcoStruxure Geo SCADA Expert
  • Metering & Power Quality
  • Schneider Electric Wiser

Knowledge Center

Events & webinars

Ideas

Blogs

Get Started

  • Ask the Community
  • Community Guidelines
  • Community User Guide
  • How-To & Best Practice
  • Experts Leaderboard
  • Contact Support
Brand-Logo
Subscribing is a smart move!
You can subscribe to this board after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the board - and gain access to more than 10,000+ support articles along with insights from experts and peers.

Register today for FREE

Register Now

Already have an account? Login

Terms & Conditions Privacy Notice Change your Cookie Settings Š 2025 Schneider Electric

This is a heading

With achievable small steps, users progress and continually feel satisfaction in task accomplishment.

Usetiful Onboarding Checklist remembers the progress of every user, allowing them to take bite-sized journeys and continue where they left.

of