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Electrical phase monitoring circuit

閱讀：732發(fā)布：2021-12-24

專利匯可以提供Electrical phase monitoring circuit專利檢索，專利查詢，專利分析的服務(wù)。并且An electrical circuit for monitoring or indicating the sequence of electrical phases or the direction of rotation of a multiphase electrical motor. The rotation monitor includes a delta connected arrangement of a capacitor in one arm, a resistor in another arm, and the third arm including the parallel combination of a light and a lamp of a photocell unit. The three terminals of the delta arrangement are connected to the three-phase conductors of a source or electrical apparatus to be tested, the terminals on either side of the parallel arrangement of lamp and light are connected through the intermediary of two equal resistors. If the phase relationship is correct, the lamp and the light will be energized, and a photosensitive resistor associated with the photocell will turn on a triac whose output can be used for many applications.，下面是Electrical phase monitoring circuit專利的具體信息內(nèi)容。

1. An electrical monitoring circuit for indicating the sequence of phases in a three-phase apparatus comprising: first, second, and third impedance means connected into a delta circuit for connection across the phases of said three-phase apparatus; said first and second impedance means having fixed impedance values; said third impedance means including variable impedance means responsive to the sequence of phases of said apparatus, the impedance of said variable impedance means varying from a high value when an incorrect phase sequence is indicated and a low value when a correct phase sequence is indicated; said variable impedance means including an energy emitting element and an energy sensitive element, said energy emitting element emitting energy when the sequence of phases is correct so that the impedance of said energy sensitive element decreases in response to said energy; and utilization means responsivE to said energy sensitive means to indicate the existance of the desired sequence of phase.
2. The circuit of claim 1 wherein said energy emitting element is a light emitting element and said light sensitive element is light sensitive.
3. The circuit of claim 2 wherein said utilization means includes switching means responsive to said energy sensitive means for connecting said apparatus to a three-phase source when said sequence of phases is correct.
4. The circuit of claim 2 wherein said first impedance means is a reactive element.
5. The circuit of claim 2 further including first resistance means for connecting said first and third impedance means to said three-phase apparatus; and second resistance means for connecting said second and third impedance means to said three-phase apparatus.
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