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| Тема |
 Ниво на заводските енергетици |
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| Автор | OM (Нерегистриран) | |
| Публикувано | 06.04.08 14:32 |
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Винаги съм имал сериозни резерви за нивото на заводските енергетици у нас. Както се вижда обаче от цитата по-долу положението в Щатите не е по-розово. Взел съм го от един щатски професионален форум.
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Right now one of my former co-workers and good friends is getting his feet on the ground at a new employer's facility. He's found a good amount (a SCARY amount) of protection disabled because it was giving erroneous trips. Nobody on the staff knew how to troubleshoot it nor did they have a real idea of what it was supposed to do anyway, so they just disconnected it from the trip circuit and made it an alarm.
I responded to a call at a facility where a fault had cleared by blowing the fuses on the incoming utility feed outside the fence. Since inside the fence was a line-up of 13.8 switchgear that should have tripped before the fuses blew, I was interested in what went wrong. I found the instantaneous overcurrent elements had flagged on the electromechanical relays (Westinghouse CO's) but the breakers had NOT tripped. A minute later I found the battery charger had been de-energized and disconnected from the station battery bank, and that had been the situation for years. Nobody in the (state-run) facility had the foggiest idea of how the switchgear worked or what the battery bank was supposed to do. All they knew was that things ran just fine without the batteries. And it did, until that fault downstream. They'd been closing breakers with the manual maintenance bar, and tripping them using the manual trip on the front of the breaker. Again, incomplete knowledge of the system that went un-detected for years, because the facility staff did not even know which questions needed to be asked until somebody showed up that was familiar with the equipment and how it was supposed to work...
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