Method of Controlling a Pump and Motor
AssigneePentair Flow Technologies, LLC
InventorsMicheal Robert Pasche, Gary Thomas Baase, II, William James Genaw
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention provide a variable frequency drive system and a method of detecting a ground in a system having a pump driven by a motor. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill mode, an automatic start mode, dry run protection, an electromagnetic interference filter compatible with a ground fault circuit interrupter, two-wire and three-wire and three-phase motor compatibility, a simple start-up process, automatic password protection, a pump out mode, digital input/output terminals, and removable input and output power terminal blocks.
Claims24
A method of detecting a ground in a water distribution system having a pump coupled to a motor, the motor being driven by a drive located in an enclosure, the method comprising:
- testing for a voltage at least one of on the enclosure, inside the enclosure, and in proximity to the enclosure;
- starting a fault timer if the voltage is present;
- incrementing the fault timer as long as the voltage is present;
- determining whether the fault timer has exceeded a predetermined time period;
- and
- stopping the motor when the fault timer has exceeded the predetermined time period.
A water distribution system comprising:
- a pump;
- a motor coupled to the pump;
- an enclosure;
- a controller including a drive connected to the motor, the controller housed in the enclosure;
- the controller testing a voltage at least one of on the enclosure, inside the enclosure, and in proximity to the enclosure;
- the controller starting a fault timer if the voltage is present;
- the controller incrementing the fault timer as long as the voltage is present;
- the controller determining whether the fault timer has exceeded a predetermined time period;
- and
- the controller stopping the motor when the fault timer has exceeded the predetermined time period.
Dependencies are inferred from the claim text.