moldyoldy
Flashlight Enthusiast
Re: Whats with the mid Atlantic states ?
Ref the power failures:
Actually Sandy was a good test of backup generator systems. I am amazed at the number of failures of hospital backup generators. And with all of that individual patient equipment running on battery until either the equipment is turned off or the patient & equipment is moved to a location with AC power, that level of discharge often kills a cell or two in the battery packs.
Before I retired, I finally toured a major network data center for the Midwest: They had battery-driven inverters for the first few minutes, then the big generators were supposed to kick in and those had diesel fuel for 24 hrs. and as the manager said, we can truck in more diesel fuel from our other sites in less than 24 hrs. The goal was 24/7 uptime.
At my work, we tested the 3 large generators inside the building about 2x/year and during the day to put a decent load on them. We have had switch failures under load. Additionally, the generators were used several times a summer whenever Xcel Energy declared a power emergency and it was cheaper to run the diesel generators rather than pay the electric power premium for pulling over 4 Megawatts during the emergency. Our large dual UPS system also failed because of poor contracted battery maintenance. In one case, we discovered that we could not even run an inverter on batteries w/o any load. In a smaller company the outside generators are tested maybe once a year and on a weekend - which is not a loaded test - and then they find out that someone was siphoning diesel from the tank...
My own house loses AC Mains power maybe a dozen times a year mainly because of old wiring in the neighborhood. However Comcast has always stayed up even during wider power failures. Yes, I have at least one oversized UPS on my cable modem and wireless router and have too frequently observed them kick out when the battery was discharged - and the run time is over an hour under load from the cable modem and wireless router. We have only laptops or Netbooks, no desktop computers.
and yes, as a pedigreed flashaholic, I can keep light in the house for several winter nights with flashlights. and our 3 cars all have DC-AC inverters. However I never had a generator - saw too many problems at other houses, usually because of no maintenance until needed.
Ref the power failures:
Actually Sandy was a good test of backup generator systems. I am amazed at the number of failures of hospital backup generators. And with all of that individual patient equipment running on battery until either the equipment is turned off or the patient & equipment is moved to a location with AC power, that level of discharge often kills a cell or two in the battery packs.
Before I retired, I finally toured a major network data center for the Midwest: They had battery-driven inverters for the first few minutes, then the big generators were supposed to kick in and those had diesel fuel for 24 hrs. and as the manager said, we can truck in more diesel fuel from our other sites in less than 24 hrs. The goal was 24/7 uptime.
At my work, we tested the 3 large generators inside the building about 2x/year and during the day to put a decent load on them. We have had switch failures under load. Additionally, the generators were used several times a summer whenever Xcel Energy declared a power emergency and it was cheaper to run the diesel generators rather than pay the electric power premium for pulling over 4 Megawatts during the emergency. Our large dual UPS system also failed because of poor contracted battery maintenance. In one case, we discovered that we could not even run an inverter on batteries w/o any load. In a smaller company the outside generators are tested maybe once a year and on a weekend - which is not a loaded test - and then they find out that someone was siphoning diesel from the tank...
My own house loses AC Mains power maybe a dozen times a year mainly because of old wiring in the neighborhood. However Comcast has always stayed up even during wider power failures. Yes, I have at least one oversized UPS on my cable modem and wireless router and have too frequently observed them kick out when the battery was discharged - and the run time is over an hour under load from the cable modem and wireless router. We have only laptops or Netbooks, no desktop computers.
and yes, as a pedigreed flashaholic, I can keep light in the house for several winter nights with flashlights. and our 3 cars all have DC-AC inverters. However I never had a generator - saw too many problems at other houses, usually because of no maintenance until needed.