Peak load limiting

Details Peak load limiting Peak load limiting

1983-02-16

1984-09-18

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural load circuit systems

Control of current or power

307 35, 307 41, 307126, H02J 1300

Patent

active

044726406

ABSTRACT:
An electric range is connected in series with first and second current sensing relays between power lines having 230 volts a.c. therebetween. An electric dryer is connected in series with normally closed contacts associated with the first current sensing relay between the first and second lines. A water heater is connected in series with normally closed contacts between the first and second lines and with normally open contacts between the first and a third neutral line. Both the latter contacts are associated with the second current sensing relay. The first current sensing relay operates at a first threshold level of current drawn by the electric range to open the normally closed contacts in series with the electric dryer. The second current sensing relay operates at a second threshold value higher than that of the first to open the normally closed contacts and close the normally open contacts in series with the electric water heater.

REFERENCES:
patent: 2199639 (1970-05-01), Lee et al.
patent: 2521171 (1950-09-01), Kercher
patent: 2645726 (1953-07-01), Van Ryan et al.
patent: 3423598 (1969-01-01), Goldberg
patent: 4066913 (1978-01-01), Manning et al.
patent: 4390876 (1983-06-01), Bjorklund et al.
patent: 4392064 (1983-07-01), Alberti

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