Search results
Results from the WOW.Com Content Network
On a 3-phase circuit, a recloser is more beneficial than three separate fuse cutouts. For example, on a wye to delta conversion, when cutouts are used on the wye side and only 1 out of 3 of the cutout fuses open, some customers on the delta side have a low voltage condition, due to voltage transfer through the transformer windings .
In 1956, Hugh C. Ross at Jennings Radio Manufacturing Corporation revolutionized the high-frequency-circuit vacuum switch and produced a vacuum switch with a rating of 15 kV at 200 A. Five years later, Thomas H. Lee at General Electric produced the first vacuum circuit breakers [2] [3] with a rated voltage of 15 kV at short-circuit breaking ...
A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device that interrupts an electrical circuit when the current passing through a conductor is not equal and opposite in both directions, therefore indicating leakage current to ground or current flowing to another powered conductor.
Lighting and general purpose receptacles are at 120 volts AC, with larger devices fed by three wire single-phase circuits at 240 volts. In commercial construction, three-phase circuits are often used. Common 3 phase configurations within a building are 208v/120 wye, 120/240 center tapped delta and 480v/277v wye. Lighting is usually fed by 277 V ...
When is ESPN's 'College GameDay?' "College GameDay" will air from 9 a.m. ET to noon ET on Saturday, Dec. 7. How to watch ESPN's 'College GameDay'
A three-phase motor is more compact and less costly than a single-phase motor of the same voltage class and rating, and single-phase AC motors above 10 hp (7.5 kW) are uncommon. Three-phase motors also vibrate less and hence last longer than single-phase motors of the same power used under the same conditions. [26]
November 10, 2024 at 3:16 PM Former Staten Island Congressman Michael Grimm has been left paralyzed from the chest down after falling off of a horse in a freak polo accident in September, pals ...
3 cloves of minced garlic. 1 can (15 oz) kidney beans, drained and rinsed. 1 can (15 oz) pinto beans, drained and rinsed. 1/2 cup beer (optional) 1 bay leaf. Salt and pepper to taste.