sealed acid battery
sealed acid battery
(OP)
Hi everybody
Because of special specification of sealed batteries I have never seen that this type of battery used in power substations.But I want to be sure that can we use this type of battery in power substation or not.Do you have any experiance about this?
Because of special specification of sealed batteries I have never seen that this type of battery used in power substations.But I want to be sure that can we use this type of battery in power substation or not.Do you have any experiance about this?






RE: sealed acid battery
The downfalls are their shorter lifespan (5-10 years), their dependence on being kept as close to 20 degrees centigrade as possible and the charge voltage has to be more precise.
I work mainly in the oil and gas industry and the majority of batteries, whether it be switchgear tripping and closing or control, UPS for critical loads or 24V telecoms system are now using sealed lead acid batteries.
UPS engineer http://www.powerups.co.uk
RE: sealed acid battery
Rafiq Bulsara
http://www.srengineersct.com
RE: sealed acid battery
I would not accept VRLA in a substation: too unreliable. Do the job properly, not cheaply.
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If we learn from our mistakes I'm getting a great education!
RE: sealed acid battery
ARAMCO used them for years, then switched back to wet. They get damaged by high temperatures during shipment. So not recommended for the middle east.
RE: sealed acid battery
Some of my former clients bought into the "maintenance free" sales pitch and were severely affected by the short lifespan.
old field guy
RE: sealed acid battery
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If we learn from our mistakes I'm getting a great education!
RE: sealed acid battery
RE: sealed acid battery
I agree. That is why the maintenance free was in inverted commas.
Most sites that I deal with do quarterly Cellcorder internal resistance checks and two yearly discharges.
I have also seen more sealed lead acid cells fail before the 10 year mark than last the full 10 years.
I would listen to the guys who have substation experience and project costing experience. They know more about the implications of battery systems in substations.
My concern is that you have stated that the project requires sealed lead acid cells. If you could give more information on why they need to be used then that would probably help.
UPS engineer http://www.powerups.co.uk
RE: sealed acid battery
I think the biggest advantage of flooded is that you get to actually see what's happening with them. You actually have to have, hands-on, which keeps a human in the loop. You can see the specific gravity start to shift in some cells not just find the whole stack choking at some point. Sir-prize!
Keith Cress
kcress - http://www.flaminsystems.com
RE: sealed acid battery
Rafiq Bulsara
http://www.srengineersct.com
RE: sealed acid battery
RE: sealed acid battery
Alan
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"It's always fun to do the impossible." - Walt Disney
RE: sealed acid battery
RE: sealed acid battery
As an example, the dual-redundant UPS system which went in to the power plant I left a year ago had dual VRLA battery strings on each UPS. A series of cell failures in the space of a week and a DC shoot-through on an inverter left us with one UPS module on one VRLA string. I would have been much happier on a single string of flooded cells - 'nervous' isn't close to how I felt. One more bad cell would have taken the whole site off. An example of a project driven by cost and not how the engineers would have liked to do it.
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If we learn from our mistakes I'm getting a great education!