Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-09-22
1979-12-18
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
361 79, G01R 3102
Patent
active
041796519
ABSTRACT:
An arrangement for supervising an electrical line for short circuits in which current and voltage signals are derived from the line current and line voltage at a predetermined measuring point. The current and voltage signals are relatively weighted by multiplying at least one of these signals by a weighting factor which is at least approximately free of phase rotation. At least one auxiliary signal is formed corresponding to the sum or difference in each case of a pair of relatively weighted current and voltage signals. An amplitude comparison is carried out between the auxiliary signal and a reference signal. The weighting factor is related to the current signal and the voltage signal, and is a quantity at least approximately corresponding to the characteristic line resistance or its reciprocal value. Two auxiliary signals may be formed by addition and subtraction respectively of a pair of relatively weighted current and voltage signals, and one of these auxiliary signals is used, in the amplitude comparison, as a reference signal for the other.
REFERENCES:
patent: 4063160 (1977-12-01), Lanz et al.
patent: 4063162 (1977-12-01), Lanz et al.
patent: 4063164 (1977-12-01), Lanz et al.
patent: 4063165 (1977-12-01), Lanz
patent: 4063166 (1977-12-01), Glavitsch et al.
BBC Brown Boveri & Company Limited
Strecker Gerard R.
LandOfFree
Method and apparatus for supervising an electrical line for shor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for supervising an electrical line for shor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for supervising an electrical line for shor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-454986