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The Water Cooler
General Discussion
Electricians or people that understand wiring, test me
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<blockquote data-quote="dennishoddy" data-source="post: 3291067" data-attributes="member: 5412"><p>When an out of phase upset occurs, the generator becomes a motor and that's when the bad stuff starts happening. You lose total control of the control system, and the generator/motor can hunt for higher speed until it comes apart. The armature shaft on a 550 megawatt steam generator is 3' thick with all the turbine rotors attached in three stages. I don't remember how many tons it weighs but it's in the hundreds of tons. </p><p>A plant in England motored a generator and it came out of its housing, spun into the control room and killed everyone inside. Dozen or so folks, many years ago. Now all power plant generators are designed to spin away from the control room if they motor and come out of their housing as a safety issue.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 3291067, member: 5412"] When an out of phase upset occurs, the generator becomes a motor and that's when the bad stuff starts happening. You lose total control of the control system, and the generator/motor can hunt for higher speed until it comes apart. The armature shaft on a 550 megawatt steam generator is 3' thick with all the turbine rotors attached in three stages. I don't remember how many tons it weighs but it's in the hundreds of tons. A plant in England motored a generator and it came out of its housing, spun into the control room and killed everyone inside. Dozen or so folks, many years ago. Now all power plant generators are designed to spin away from the control room if they motor and come out of their housing as a safety issue. [/QUOTE]
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