| (19) |
 |
|
(11) |
EP 0 371 757 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.09.1991 Bulletin 1991/38 |
| (43) |
Date of publication A2: |
|
06.06.1990 Bulletin 1990/23 |
| (22) |
Date of filing: 28.11.1989 |
|
| (51) |
International Patent Classification (IPC)5: H01H 71/32 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
01.12.1988 GB 8828054
|
| (71) |
Applicant: WYLEX LIMITED |
|
Wythenshawe
Manchester, M22 4RA (GB) |
|
| (72) |
Inventor: |
|
- Kidd, Alan Lister
Southport, PR8 2LN (GB)
|
| (74) |
Representative: Massey, Alexander et al |
|
MARKS & CLERK,
Sussex House,
83-85 Mosley Street
Manchester M2 3LG
Manchester M2 3LG (GB) |
|
| |
|
| (54) |
Residual current devices |
(57) An RCD comprises a current-monitoring system or device including an electro-mechanical
release means adapted to actuate a circuit-breaking mechanism upon current imbalance.
The electro-mechanical release means comprises a re-setting motor, whereof the rotary
output shaft is provided with a cam or ramp surface to engage with a release flag
adapted to act on a latch to release a switch mechanism of the RCD. Stationary poles
of the re-setting motor are formed with an extension having an aperture through which
conductors connecting a power supply to a load can pass.