A method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method includes regulating, by way of the control unit, the operational speed of the pump in order to direct an average power of the pump towards a predetermined set level. The method includes determining whether the instantaneous power of the pump is outside a predetermined range, by monitoring at least one of the parameters: power [P], current [I] and power factor [cos ϕ].The method further includes determining whether the operational speed of the pump is increasing, and stopping the pump due to snoring, by way of the control unit, when the instantaneous power of the pump is determined as being outside the predetermined range at the same time the operational speed of the pump is determined as increasing.

A method for stopping a submersible pump when the pump is snoring, wherein the pump is operatively connected to a control unit. The method includes regulating, by way of the control unit, the operational speed of the pump in order to direct an average power of the pump towards a predetermined set level. The method includes determining whether the instantaneous power of the pump is outside a predetermined range, by monitoring at least one of the parameters: power [P], current [I] and power factor [cos ϕ].The method further includes determining whether the operational speed of the pump is increasing, and stopping the pump due to snoring, by way of the control unit, when the instantaneous power of the pump is determined as being outside the predetermined range at the same time the operational speed of the pump is determined as increasing.

A pump cartridge comprising an external housing including a lateral wall, a first fin extending from a first side of the lateral wall, and a second fin extending from a second side of the lateral wall. The second side of the lateral wall may be opposite the first side of the lateral wall, such that the fins are on opposite sides of the lateral wall. The pump cartridge may be part of a pumping system further comprised of a chassis comprising a pump basin including an interior side wall, a first tab extending inwardly from the interior side wall, and a second tab extending inwardly from the interior side wall and opposed to the first tab. The first fin of the cartridge is reversibly engageable with the first tab of the chassis and the second fin of the cartridge is reversibly engageable with the second tab of the chassis.

A liquid supply system includes a suction lance (6) configured to be inserted into a liquid container (14) and at least one level sensor (10, 12) fixed on the lance (6) and configured to detect a liquid level (22) inside a liquid container (14). A control device (4) is connected to the level sensor (10, 12) and configured to determine a rate of change of the liquid level (22) detected by the at least one level sensor (10, 12) and to detect a lance removal if the rate of change reaches or exceeds a predefined threshold. A method for detecting the removal of a suction lance (6) from a liquid container (14) is provided.

A wastewater sump assembly for receiving and disposing of undesired fluid and, in some cases, solid waste (collectively “wastewater”). A sump basin includes an upstanding wall a base and a top. A sensor in the form, e.g., of a float switch extends into the basin and is operable to actuate a pump to remove collective wastewater from the basin. The sensor depends from a sensor support that is supported distally within the basin in a vertical manner and is supported proximately within the basin in a horizontal manner, with securement of the sensor support not requiring traversal of the basin top and with the distal basin support not needing to be accessed vertically through a pump access aperture in the top.

A wastewater sump assembly for receiving and disposing of undesired fluid and, in some cases, solid waste (collectively “wastewater”). A sump basin includes an upstanding wall a base and a top. A sensor in the form, e.g., of a float switch extends into the basin and is operable to actuate a pump to remove collective wastewater from the basin. The sensor depends from a sensor support that is supported distally within the basin in a vertical manner and is supported proximately within the basin in a horizontal manner, with securement of the sensor support not requiring traversal of the basin top and with the distal basin support not needing to be accessed vertically through a pump access aperture in the top.

A pump having a drive unit with an electric motor, a hydraulic unit connected to the electric motor, and an integrated control unit operatively connected to the electric motor and configured for monitoring and controlling the pump. An integrated pressure sensor, connected to the control unit, has a fixed reference pressure. The control unit determines a liquid level of a liquid surrounding the pump based on a relation between an actual value of the pressure sensor and a reference value. A method for calibrating the pump comprises initiating pumping, continuing pumping until the liquid level is equal to a predetermined calibration level, determining the actual pressure value when the liquid level is equal to the predetermined calibration level, and calibrating the pump by setting a new reference pressure value corresponding to the actual pressure value.

Methods, systems, and computer-readable medium to perform operations including: determining, based on at least one dimension of an annulus of a wellbore, a respective downhole position at which to position at least one of an upper sensor and a lower sensor of a downhole pumping tool that includes a pump; positioning the downhole pumping tool in the wellbore such that at least one of the upper sensor and the lower sensor are positioned at the respective downhole position; in response to the upper sensor detecting a first fluid level in the annulus, activating the pump so that the pump pumps fluid from the annulus into a tubing of the wellbore, where the tubing carries the fluid to the surface; and in response to the lower sensor detecting a second fluid level in the annulus, deactivating the pump, where the second fluid level is below the first fluid level.

The present application generally relates a system for duplex control of redundant passively-actuated electronic devices. In one embodiment, the system comprises a housing, a controller mounted inside the housing, an input/output (I/O) interface integrated with the housing that includes a first port configured to electrically couple a power input to the controller, a second port configured to electrically couple a first pump to the controller, and a third port configured to electrically couple a second pump to the controller, and a set of relays connected to the second port and the third port. In response to a current sensing circuit sensing that a first current indicates that the-first pump has shut off, the controller may activate the second pump and deactivate the first pump by controlling the set of relays to disconnect the power source from the first pump and to connect the second pump to the power source.

The present application generally relates a system for duplex control of redundant passively-actuated electronic devices. In one embodiment, the system comprises a housing, a controller mounted inside the housing, an input/output (I/O) interface integrated with the housing that includes a first port configured to electrically couple a power input to the controller, a second port configured to electrically couple a first pump to the controller, and a third port configured to electrically couple a second pump to the controller, and a set of relays connected to the second port and the third port. In response to a current sensing circuit sensing that a first current indicates that the-first pump has shut off, the controller may activate the second pump and deactivate the first pump by controlling the set of relays to disconnect the power source from the first pump and to connect the second pump to the power source.