Follow Slashdot blog updates by subscribing to our blog RSS feed


Forgot your password?
Slashdot Deals: Cyber Monday Sale Extended! Courses ranging from coding to project management - all eLearning deals 20% off with coupon code "CYBERMONDAY20". ×

Comment Alarmist (Score 1) 450

I have 100 amp service. That means I can use 22000 watts, more than enough. Right now, I'm using 3 1500 watt heaters in my house, for a total of 4,500 watts.

Some of my neighbors have 200 amp service. The utility company is not going to put a 12000 watt transformer up to any of our houses...

Comment Re:frequency converter drives ? (Score 4, Informative) 334

AC motors require these drives to get their speed. 60Hz would be about 1800 or 3600 rpm, depending how its wound. Most industrial drives can be programmed for 400Hz, which will spin the armature quite fast. Enrichment is like spinning glassware on a dentist's drill. Those frequencies at that high of voltage (480 volts typical) has a very high switching rate that requires exotic transistor designs. Given that these controllers aren't very common, say for a juice mixer, they can be tracked and sabotaged by the distributor quite easily.

A rock store eventually closed down; they were taking too much for granite.