Electrical transmission or interconnection systems – Plural supply circuits or sources – Load current control
Patent
1995-05-22
1997-02-18
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Load current control
307 18, 307 29, 307 38, H02J 110
Patent
active
056043856
ABSTRACT:
An apparatus for and method of evenly distributing an electrical load across a three phase power distribution network. The current in each incoming phase and in each branch circuit is measured by a plurality of current sensors. The output of the current sensors are monitored by a processor. Associated with each branch circuit is a multi-pole switch and a conventional circuit breaker. Each switch is able to connect its corresponding branch circuit to any incoming phase or to disconnect the branch circuit from all three phases. The processor periodically monitors the current flowing through each incoming phase and based on branch circuit load conditions, reprograms the switches to keep the branch circuit loads evenly distributed across all three incoming phases. In another embodiment, a summing circuit combines the current capacities of all three incoming phases into a single summed output. This output is subsequently rectified and used to generate a single phase AC voltage which feeds all branch circuits in the system.
REFERENCES:
patent: 3991359 (1976-11-01), Thompson et al.
patent: 4659942 (1987-04-01), Volp
patent: 5182464 (1993-01-01), Woodworth et al.
patent: 5191520 (1993-03-01), Eckersley
patent: 5477091 (1995-12-01), Fiorina et al.
Friedman Mark M.
Kaplan Jonathan S.
Shoop Jr. William M.
Target Hi-Tech Electronics Ltd.
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