Process for predrying a coil block containing at least one windi

Details Process for predrying a coil block containing at least one windi Process for predrying a coil block containing at least one windi

1998-04-16

2000-06-27

Walberg, Teresa

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

29606, A21B 100, H01F 706

Patent

active

060809647

ABSTRACT:
The process is used for predrying a coil block (5) inside a gas-tight housing (1), said coil block containing at least one winding (51) and solid insulations. The winding is hereby heated under reduced pressure with direct current or low-frequency alternating current to an upper winding temperature. Parallel to this, the solid insulations are heated with air circulating inside the housing (1). The air temperature is hereby maintained lower than the winding temperature. The combined heating with heating current and circulating air results in an especially uniform predrying, and at the same time saves time and energy. At the same time, the winding can be stabilized and dimensioned during the predrying process under the action of pressure.

REFERENCES:
patent: 3233311 (1966-02-01), Giegerich et al.
patent: 3764718 (1973-10-01), Middough et al.
patent: 3769008 (1973-10-01), Borok et al.
patent: 4249068 (1981-02-01), Mangan et al.
patent: 4403267 (1983-09-01), Verhoff et al.
patent: 4499369 (1985-02-01), Gibb
patent: 4615778 (1986-10-01), Elton
patent: 4970372 (1990-11-01), Fleiter et al.
patent: 5069731 (1991-12-01), Yoshizawa et al.
patent: 5388809 (1995-02-01), Hemsath
patent: 5524020 (1996-06-01), Jhawar et al.
patent: 5621372 (1997-04-01), Purohit
Berkhahn, Von Klaus: Die Kerosindampf--Trocknung von Transformatoren, BBC-Nachrichten, 1975, H. 8/9, pp.458-463.
Kusay, R.G.P.: Vacuum Drying of Power Transformers Can Reduce Outages, Electrical Review, Apr. 23, 1971, pp. 551-556.

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