Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1992-08-10
1993-06-22
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 18, 417 20, 417 32, 417 45, 417 53, F04D 1500
Patent
active
052211894
ABSTRACT:
A method and apparatus for controlling a fire pump motor for use in a building having a water supply for a fire protection system, a power line, and a pressure sensor. The pressure sensor detects a high or low system water pressure with respect to a reference water pressure. A voltage controller is coupled between the power line and the fire pump motor for controlling the voltage from the power line to the fire pump motor, responsive to indications from the pressure sensor. The voltage controller increases the voltage to the fire pump motor to full voltage and runs the fire pump motor at full voltage for a minimum run time and until high pressure is indicated. The voltage controller then decreases the voltage to the fire pump motor from full voltage to a predetermined voltage level. The voltage controller holds the voltage to the fire pump at the predetermined voltage level for a first preset period of time. The voltage controller thereafter decreases the voltage to the fire pump motor from the predetermined voltage level to zero. The voltage is increased any time low pressure is indicated. The voltage is subsequently decreased from full voltage, held at the predetermined level, and decreased to zero when high pressure is indicated.
REFERENCES:
patent: 1634875 (1927-07-01), Kimball
patent: 3544235 (1970-12-01), Smith
patent: 3576292 (1971-04-01), Block
patent: 3591077 (1971-07-01), Alton et al.
patent: 3859565 (1975-01-01), Henningsen
patent: 3953152 (1976-04-01), Sipin
patent: 3974879 (1976-08-01), Nelson, Jr. et al.
patent: 4124332 (1978-11-01), Nishijyo
patent: 4220440 (1980-09-01), Taylor et al.
patent: 4278110 (1981-07-01), Price et al.
patent: 4290735 (1981-09-01), Sulko
patent: 4344741 (1982-08-01), Taki
patent: 4611290 (1986-09-01), Henningsen et al.
patent: 4907620 (1990-03-01), Becker
patent: 5158436 (1992-10-01), Jensen et al.
Bertsch Richard A.
Firetrol, Inc.
Scheuermann David W.
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