Voltage Problem

norulez43September 16, 2013

I've been having this problem with battery backup units that kick into battery mode repeatedly. They either click or beep every time they do so and it is quite annoying. Looking at the manuals, it seems that there are certain voltage tolerances (ranges) and if the voltage drops or spikes out of that range, it kicks into battery mode. I wanted to see what was happening so I hooked up a digital multimeter to the same receptacle. I could not see the voltage move when the battery backup kicked on (it was still a good 117V at the time). Is it possible that it is happening too fast for the multimeter to pick it up? Or, should I be looking into something else? I've been looking for a good voltage data logger to record a history of voltage but I don't want to bother unless it can pick up these possible quick sags/spikes.

Thank you for reporting this comment. Undo
Ron Natalie

It's possible, or it could be the battery backup has problems of it's own

    Bookmark   September 16, 2013 at 10:21PM
Thank you for reporting this comment. Undo

It happens with multiple battery backups so it is not the UPS.

    Bookmark   September 17, 2013 at 8:34AM
Thank you for reporting this comment. Undo

You need at least an RMS digital multimeter. What kind are you using?

    Bookmark   September 17, 2013 at 4:13PM
Thank you for reporting this comment. Undo

What is happening with other things in the house such as microwave ovens and digital clocks with lighted displays?

    Bookmark   September 17, 2013 at 6:09PM
Thank you for reporting this comment. Undo

I am using a Fluke 324 which says True-RMS. This is actually happening at work, not my house, and I'd like to buy something that can record these voltage drops or spikes if possible so I can show them to the electric company. We had a spindle drive crash a few weeks ago out in the shop and the repair guy said he was sure it was due to a power problem but we can't prove that.

    Bookmark   September 18, 2013 at 12:28PM
Thank you for reporting this comment. Undo

Stingy with information complicates the offering of solutions. The POCO may be blameless in your situation. If your premises has 3-phase Delta service, the onsite single phase power may be supplied by customer-owned and installed transformers. If so, the problem may be there. A pro is needed in person at that premises.

    Bookmark   September 18, 2013 at 7:17PM
Thank you for reporting this comment. Undo

There are such things as power quality monitors and data loggers. They sample a fairly high rates and log the data.

    Bookmark   September 19, 2013 at 1:26PM
Sign Up to comment
More Discussions
Badly done multi-wire circuits (previous owner strikes again..)
I bought a 1940-ish house last year, for which the...
can homeowner so electrical work in his own home ? (above ground pool)
I live in Western ma and I'm having an Adobe ground...
Dryer power cord next to vent
My contractor is enlarging the dryer vent hole in the...
Need to Understand GFCI Requirements.
I posted this in the remodeling section, but I think...
Goodbye Phone Jack: what to do with wires?
We want to remove this phone jack. It's in a useless...
Sponsored Products
Beige Microfleece Low-Voltage Warming Blanket
$69.99 | zulily
Kona Swingarm 1WU by Besa Lighting
$387.00 | Lumens
Mushroom Outdoor Landscape Path Light
$84.91 | Lamps Plus
Hinkley Lighting Path & Landscape Lights Low Voltage 12-Watt Outdoor Southern
$79.00 | Home Depot
Bimbi White Spiral Pendant by Oggetti Luce
$264.00 | Lumens
Algreen Illuminated Relaxation Outdoor Fountain with Authentic River Rocks and S
$119.99 | Hayneedle
R12 Shape BA15S Bulb with High Power 1 Watt LED
Super Bright LEDs
Acid Verde Mushroom Hat Low Voltage Landscape Light
Lamps Plus
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™