Title:
DEVICE FOR SAFELY DISCONNECTING AN ELECTRICAL LOAD WITH ESPECIALLY HIGH INDUCTIVITY FROM AN ELECTRICAL DC-VOLTAGE SUPPLY
Document Type and Number:
WIPO Patent Application WO1999063561
Kind Code:
A3
Abstract:
A first and a second line (L1, L2) conduct the input direct voltage (Ue) to the load. A fuse (S) is connected in series in the first line. The switching contact (K11) of a first relay (K1) is also connected in series in the first line and is opened during a disconnecting operation. The switching contact (K21) of a second relay (K2) is connected in parallel between the first and second line after the first relay and is closed during a disconnecting operation, after the first relay has been opened. The inventive device is very fault-tolerant, even with usual commercial relays.
Inventors:
MAGNUSSEN BJOERN (DE)
Application Number:
PCT/DE1999/001480
Publication Date:
June 02, 2000
Filing Date:
May 17, 1999
Export Citation:
Assignee:
SIEMENS AG (DE)
MAGNUSSEN BJOERN (DE)
MAGNUSSEN BJOERN (DE)
International Classes:
H02H7/085; H01H7/00; H01H47/00; (IPC1-7): H02H7/085; H01H47/00
Foreign References:
| US4710841A | 1987-12-01 | |||
| DE1956062A1 | 1971-05-13 |
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