Page 1005 - Industrial Power Engineering and Applications Handbook

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A, = effective surface of radiation per foot of enclosure 8 Dwight, H.B., ‘Proximity effect formulae for bus enclosures’,
length in square inches Trans. IEEE, 87, August, 1622-1628 (1968).
TI = absolute temperature of the hot body 9 Dwight, H.B., Andrews, G.W. and Tileston Jr H.W.,
= (6, + 273)OC (e, = enclosure surface temperature ‘Temperature rise of busbars’, Generul Electric Review, May
( 1940).
in “C) 10 Elgar, E.C., Rehder, R.H. and Sverdlow, N., ‘Measured losses
T2 = absolute ambient temperature in isolated-phase and comparison with calculated values’, Trans.
= (6, + 273)”C (0, = ambient temperature in “C) IEEE, 87, August, 1724-1730 (1968).
(For conductors, the enclosure temperature will 11 Gupta, C.P., and Prdkash, R., Engineering Heat Transfer,
become their ambient temperature). Nemchand Bros, Roorkee, India.
12 IEEE Committee, ‘Proposed guide for calculating losses in
isolated phase bus’, Trans. IEEE, 87,August, 17361737 (1968).
By convection 13 Jain, M.P., Proximity Effects of Busbars, ME thesis, Electrical
Engineering Department. University of Roorkee, Roorkee, India
W, E 0.0022. A, . pO.5 , @1.25 W/ft (3 1.9) (1969).
h 0.25 14 Jain, M.P. and Ray, L.M., ‘Field pattern and associated losses
in aluminium sheet in presence of strip busbar’, Trans. IEEE,
A, = effective surface area per foot of enclosure length 89, Scptcmber/October, 1525-1539 (1970).
- in square inches 15 Jain, M.P. and Ray, L.M., ‘An experimental study of proximity
P = air pressure in atmospheres effects of busbars’, Journal of Institution (.$Engineers (India),
= 1 at sea level 51, No. 12, Part EM, August, 341-350 (1971).
6 = temperature rise of the enclosure above the ambient 16 Mankoff, L.L., Sverdlow, N. and Wilson, W.R., ‘An analogue
temperature in “C method for determining losses in isolated-phase bus enclosures’,
Trans. IEEE, 82, August, 532-542 (1963).
h = width of flat or bar mounted in a vertical plane, or 17 Niemoller, A.R., ‘Isolated-phase bus enclosure currents’, Trans.
the diameter of a round conductor in inches IEEE, 87, August, 1714-1718 (1968).
18 Paulus, C.F. and Bellack, J.H., ‘Progress in generator leads:
Economical application of forced cooling’, Trans. IEEE, 88,
Further reading February, 175-180 (1969).
19 Poritsky, H. and Jerrard, R.P., ‘Eddy current losses’ Trans.
AIEE, Part I, 73, May, 97-108 (1954).
1 Albright, R.H., Bates, A.C., Conanagla, A. and Owens, J.B., 20 Sebold, G.K., ‘Induced current, in supporting steel for 10 000
‘Isolated-phase metal enclosed conductors for large electric Ampere. generator open bus’, Trans. IEEE, 642447 (1960).
generators’, Trans. IEEE, 81, February, 1067-72 (1963). 21 Skeats, W.F. and Sverdlow, N., ‘Minimising the magnetic filed
2 Ashdown, K.T. and Swerdlow, N., ‘Cantilever-loaded insulators surrounding isolated phase bus by electrically continuous
for isolated phase bus’, AIEE paper, April (1954). enclosures’, AZEE Trans. No. 62 (1962).
3 Buchanan, G.E., ‘Lab field test experience with high capacity 22 Skeats, W.F. and Sverdlow, N., ‘Minimising the magnetic field
isolated-phase bus’, Trans. IEEE, 78, October, 925-93 1 (1959). surrounding isolated phase bus by electrically continuous
4 Conangla, A.C., ‘Heat losses in isolated phase enclosure’, AIEE enclosures’, Truns. IEEE, 81, February, 655-657 (1963).
Trans. June, 309-3 13 (1 963). 23 Stratton, J.A., Electromagnetic Theory, McGraw-Hill, NewYork
5 Conangla, A. and White, H.E., ‘Isolated-phase bus enclosure (1941).
loss factors’, Trans. IEEE, 87, August, 1622-1628 (1968). 24 Sverdlow, N. and Buchta, M.A., ‘Practical solution of induction
6 Dwight, H.B., ‘Theory for proximity effects in wires, thin heating problems resulting from high current buses’, Trans.
tubes and sheaths’, AZEE Trans. 42 (1923). IEEE, 78, 1736-1742 (1959).
7 Dwight, H.B., ‘Some proximity effects formulae for bus 25 Wilson, W.R. and Mankoff, L.L., ‘Short circuit forces in isolated
enclosures’, Trans. IEEE, 83, December 1167-1 172 (1964). phase buses, AIEE Trans., April (1954).