| (19) |
 |
|
(11) |
EP 0 237 344 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.04.1989 Bulletin 1989/14 |
| (43) |
Date of publication A2: |
|
16.09.1987 Bulletin 1987/38 |
| (22) |
Date of filing: 11.03.1987 |
|
| (51) |
International Patent Classification (IPC)4: H01F 27/18 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
12.03.1986 GB 8606027
|
| (71) |
Applicant: G.I. INTERNATIONAL COMPANY LIMITED |
|
London EC1R 3DJ (GB) |
|
| (72) |
Inventor: |
|
- Lloyd, Harold
Pimlico
London SW1V 3AX (GB)
|
| (74) |
Representative: Lamb, John Baxter |
|
MARKS & CLERK,
57-60 Lincoln's Inn Fields
London WC2A 3LS
London WC2A 3LS (GB) |
|
| |
|
| (54) |
Improvements in induction apparatus |
(57) Stationary inductive apparatus, especially an electrical transformer, comprises a
core (11) surrounded by electrical windings (12) and contained within a tank (10)
in which the windings are provided with a container (14) having an at least partially
opened top to contain dielectric and coolant fluid; a fluid lift pump (15) is provided
to raise liquid from the bottom of the tank to the container; and the tank is connected
to an external condenser (18) located at a level above that of the windings so that
coolant liquid vapour may pass from the tank to the condenser and, having condensed
therein, be returned (under gravity) to the container (16) surrounding the windings.