Hi, I have a CS100m and its batteries are 12 years old, bulging, and not holding the system up. A vendor has been contracted through higher up in the company to come out and replace the batteries, but they wanted to check with me to see if it could be done "live" without taking the system down. I see there is a breaker on the rectifyers (Nortel) that would seem to isolate the batteries from the power scheme. So my questions is how risky is it to replace the batteries with the system running? I'm at rls 4.5, and will have a current backup before they do anything to it. I'm debating pushing back and saying it needs coordinated after hours downtime but i'm not Nortel Power certified and hoping they are and know what they are getting into. Its a large national outfit that does just battery work so maybe i'm just a little aprehensive. What do you guys think?
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Replacing UPS batteries
- Thread starter pbxNewb
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You know who can best tell you - the battery company. Those folks do live systems all day long. Personally, I would not let a phone tech work on my battery plant. I want a battery plant expert.
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Gene is exactly right. Just a note or two. Before they do any work, pull the covers off and inspect the interior for acid leaks. It should be cleaned us before the new batteries are installed. When they are done, schedule a battery test and pull the plug to see how long the new batteries last.
DocVic
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DocVic
Dedicated to Nortel Products till the end.
Need help?
If this is a DC switch, then yes you can swap out the batteries live. The batteries are not on line, they seat there waiting for a power outage. I have done it live, but if you don't feel comfortable in doing it get a battery person and they are responsible for taking the old batteries which can be a pain in the neck
OLD ROLMEN WORKING ON NORTELS AND AVAYA
OLD ROLMEN WORKING ON NORTELS AND AVAYA
We have several sites with C&D "telephone" batteries (lead acid calcium)... not sure how old these are - guessing at least 10 yrs old going into either a 600/48 power rack or one of the smaller racks holding MPR25 rectifiers.
Is there a way to load test these batteries without knocking the PBX offline? Or as Gene suggested above - let someone who does this for a living do it rather than some dumbass phone tech like me play with it?
Other than watching water levels - anything else we can do to maintain them?
A couple of my sites don't seem to be holding load when they lose power - not seeing anything in the alarms indicating a switch from grid to battery and back to grid, other than the switch doing a cold start when power comes back. No problems when I do a STAT XSM in LD 37 so the sysmon card is up and running.
Is there a way to load test these batteries without knocking the PBX offline? Or as Gene suggested above - let someone who does this for a living do it rather than some dumbass phone tech like me play with it?
Other than watching water levels - anything else we can do to maintain them?
A couple of my sites don't seem to be holding load when they lose power - not seeing anything in the alarms indicating a switch from grid to battery and back to grid, other than the switch doing a cold start when power comes back. No problems when I do a STAT XSM in LD 37 so the sysmon card is up and running.
Test the batteries with a battery tester from the auto parts store. Clamp on each battery and use the switch on the tester to put a load on the battery. If the batteries are older than 3-4 years and are the gel filled type and have not been exercised then they are most likely bad.
Disconnect the +/- 48 volt leads one at a time, carefully, and wrap them with electrical tape. Replace all of the old batteries and then reconnect the leads one at a time and don't short them out.
Disconnect the +/- 48 volt leads one at a time, carefully, and wrap them with electrical tape. Replace all of the old batteries and then reconnect the leads one at a time and don't short them out.
Ricky...
These are the large 2.2v 660 amp/hour deep cycle batteries used on the larger systems - like a 9-column Option 81c drawing 80 amps.
Batteries are made by C&D - model KCT-660 to be exact... the ones you have to top off with distilled water once in a while. There's 23 of them connected in series with a series of thick metal bars.
These are the large 2.2v 660 amp/hour deep cycle batteries used on the larger systems - like a 9-column Option 81c drawing 80 amps.
Batteries are made by C&D - model KCT-660 to be exact... the ones you have to top off with distilled water once in a while. There's 23 of them connected in series with a series of thick metal bars.
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