Hello,
I have an option 11C 3 cabinet system and am looking to install a new UPS system. Cuurently, there are 2 dedicated 15 amp ciruits servicing the 3 cabinets, the main cab is on one circuit with 2 modems on circuit and the 2 expansin cabinets are on 2nd circuit with VT520 plugged into it.
I have 2 vendor quotes -
1/ 3000VA UPS with isolation transformer built-in. Requires input voltage 220v - 240v and L6-20P receptacle. Output 25A (120v) 3000VA and 2100 watts. operating at 50% capacity
2/ 2200VA UPS. requires input voltage 120v and 5-20P receptacle. Output 18A 2200VA and 1850 watts. Operating at 73% of capacity.
The Nortel installation guides state each cabinet should be on own dedicated ciruit and requries 750 VA UPS or 500 watts for each cabinet as worse case assuming voicemail card installed. There are no voiceamil cards in these cabinets.
The argument for quote 1 is you need extra capacity to charge batteries after a power outage and you don't want to run at close to 100% because rectifiers will heat up and blow up
or have premature failure. The con is more cost and need electrician to install new 30 amp circuit.
Quote 2 - the existing circuits use 12 gauge wiring and can easily replace 15 amp breaker with 20 amp breaker. Does not say it uses isolation transformer but is it necessary on dedicated circuit? Powering the 3 cabinets at 73% and will increase by maybe 15% (guessing) while charging batteries.
Question - Does anybody have any comments on which UPS is required or have any experiences with UPS with Option 11C systems?
Thank you,
I have an option 11C 3 cabinet system and am looking to install a new UPS system. Cuurently, there are 2 dedicated 15 amp ciruits servicing the 3 cabinets, the main cab is on one circuit with 2 modems on circuit and the 2 expansin cabinets are on 2nd circuit with VT520 plugged into it.
I have 2 vendor quotes -
1/ 3000VA UPS with isolation transformer built-in. Requires input voltage 220v - 240v and L6-20P receptacle. Output 25A (120v) 3000VA and 2100 watts. operating at 50% capacity
2/ 2200VA UPS. requires input voltage 120v and 5-20P receptacle. Output 18A 2200VA and 1850 watts. Operating at 73% of capacity.
The Nortel installation guides state each cabinet should be on own dedicated ciruit and requries 750 VA UPS or 500 watts for each cabinet as worse case assuming voicemail card installed. There are no voiceamil cards in these cabinets.
The argument for quote 1 is you need extra capacity to charge batteries after a power outage and you don't want to run at close to 100% because rectifiers will heat up and blow up
or have premature failure. The con is more cost and need electrician to install new 30 amp circuit.
Quote 2 - the existing circuits use 12 gauge wiring and can easily replace 15 amp breaker with 20 amp breaker. Does not say it uses isolation transformer but is it necessary on dedicated circuit? Powering the 3 cabinets at 73% and will increase by maybe 15% (guessing) while charging batteries.
Question - Does anybody have any comments on which UPS is required or have any experiences with UPS with Option 11C systems?
Thank you,
