Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1978-07-10
1980-09-30
Hix, L. T.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
H02J 908
Patent
active
042257930
ABSTRACT:
An arrangement for monitoring a current network to which is connected at least one self-excited or separately excited three-phase synchronous machine which is operatively connected e.g. to a device which is in immediate readiness for operation and comprises an energy storage device, while between the neutral or star point of the three-phase synchronous machine and the neutral wire of the network a monitoring device is arranged for controlling the network master switch. The monitoring device includes an M.sub.P -current converter, a load following the M.sub.P -converter and a frequency relay. The frequency relay ascertains the zero axis crossings of the dropping voltage on the load. The drop of the zero axis crossing frequency below a preset value serves as a signal for a network failure and for the actuation of the network switch and/or for other switch operations desired in this connection.
REFERENCES:
patent: 2920211 (1960-01-01), Gotoh
patent: 3529215 (1970-09-01), Xavier et al.
patent: 3558911 (1971-01-01), Chen
patent: 3609426 (1971-09-01), Gaul
patent: 3967132 (1976-06-01), Takamine
patent: 3970897 (1976-07-01), Tomis et al.
Ad. Struver KG (GmbH & Co.)
Dwyer James L.
Hix L. T,.
LandOfFree
Arrangement for monitoring a current network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arrangement for monitoring a current network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for monitoring a current network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1171431