An electrical submersible well pump (ESP) has a motor electrical connector mounted to an exterior of the motor. A motor sensor connects to an interior side of the motor electrical connector. Seal first and second electrical connectors mount to an exterior of a seal/motor adapter. A seal internal wire within the seal section electrically connects interior sides of the seal first and second electrical connectors together. An external motor jumper wire extends alongside the motor between the motor electrical connector and the seal first electrical connector. A pump electrical connector mounts to an exterior of a pump/seal adapter and connects to a pump sensor within the pump. An external seal jumper wire connects between the seal second electrical connector and the pump electrical connector.

A pump for a water-conducting appliance, the pump having an electric motor comprising: a rotor comprising a ferrite body with at least four magnetic poles, wherein the ferrite body has a lateral-circumferential magnetization; and a stator comprising a pole chain made of a stack of a plurality of straight transformer sheets and rounded to a circular configuration by bending the stacked transformer sheets, wherein the pole chain has a plurality of pole portions each comprising a pole tooth; and a plurality of winding cores attached to the respective pole teeth for accommodating coils of a three-phase winding comprising wires; wherein the wires of respective phases of the three-phase winding are routed spatially separated from each other and without mutual contact at an axial end surface of the pole chain between and along adjacent winding cores around the pole chain; and wherein the wires are supported and guided such that their positions relative to the pole chain are substantially maintained when the pole chain is rounded from its straight configuration to its circular configuration.

A centrifugal electric pump assembly, comprising a wet section, which comprises inside it a liquid and/or solid scale remover substance in a position that at least potentially communicates with the wet section.

A power cable can include a conductor; an insulation layer disposed about the conductor where the insulation layer includes a first polymeric material; and a shield layer disposed about the insulation layer where the shield layer includes a second polymeric material where a solubility parameter of the first polymeric material is less than a solubility parameter of the second polymeric material.

A cooling fan and an air-cooled refrigerator are provided. The cooling fan includes a synchronous motor and an impeller. The synchronous motor includes a stator and a permanent magnetic rotor. The permanent magnetic rotor includes a rotary shaft and a permanent magnetic rotor main body attached around the rotary shaft. The stator includes a stator core and a stator winding wound around the stator core and powered by an alternating-current power supply. The permanent magnetic rotor operates at a constant rotational speed of 60f/p during a steady state operation of the motor, where f is a frequency of the AC power source and p is the number of pole pairs of the permanent magnet poles. The impeller is connected to the rotary shaft for rotation under the driving of the rotary shaft.

A low profile pump motor lead protector with a head guard and a trailing guard, the head guard including a front section with a front end and a rear section with a rear end, the trailing guard having a pin end for insertion in a head guard socket, the lead protector for protecting a motor lead of a pump and motor assembly of a downhole production string for surfacing fluid from a reservoir such as a subterranean oil well.

The invention provides a system for subsea pressure booster HV (high voltage), MV (medium voltage) and LV (low voltage) power supply and distribution. The system is distinguished in that the system consists of, essentially consists of or comprises: a supply cable without a connected variable speed drive/variable frequency drive (VSD, VFD); at least one subsea pressure booster, and; one subsea direct online switch (SDOS) for each subsea pressure booster, wherein the supply cable at a source end is coupled to an AC power source at a topside, onshore or subsea location, wherein the supply cable at a pressure booster end is coupled directly or via a distribution device to at least one subsea direct online switch, SDOS, wherein each SDOS is coupled to one subsea pressure booster. Method of operation and use of the system.

An object of the present invention is to provide a valve apparatus capable of keeping a holding state of a valve body. The valve apparatus 14 is adapted to supply cleaning fluid by switching between a first flow channel 54 and a second flow channel 55, the valve apparatus 14 being provided with: a first fluid pipe 44 having a first flow channel 54; a second fluid pipe 45 coaxially aligned with the first fluid pipe 44, the second fluid pipe 45 having a second flow channel 55; a housing 86 provided with a first valve chamber 37 and a second valve chamber 38; a partition wall 49 disposed between the first flow channel 44 and the second flow channel 55 in the housing 86; and a rib 46 provided to the housing 86 to support the partition wall 49, wherein the partition wall 49 has: a film-like valve body 50 which is elastically deformed by pressure of the first valve chamber 37 and the second valve chamber 38 so as to open one of the first flow channel 44 and the second flow channel 55 and close the other of the first flow channel 54 and the second flow channel 55; and a frame 51 attached along an outer circumference of the valve body 50 and supported by the rib 56, wherein the frame 51 is higher in stiffness than the valve body 50.

An electric submergible pumping system that includes a pump having a pump discharge; a motor; a power crossover assembly including a first top flange having a generally circular opening in the center, an upper tubular portion connected to the first top flange portion, an intermediate tubular portion including two generally rectangular shaped windows for intake suction for production fluids, a lower tubular portion having a hollow space in a center portion, and a first lower flange having a circular shape connected to the lower tubular portion. The system also includes a crossover base disposed at a lower part of the power crossover assembly, the crossover base including a base neck, a guide tube, a conductor terminal, a second top flange, and a second lower flange.

An electric circuit for powering centrifugal pumps includes a power panel of the pump which is connected to an alternating-current distribution network and to the said pump by a power line provided with a timer that regulates the operating time of the pump; which further comprises a solar module comprising photovoltaic panels and a solar micro-inverter connected in parallel to the alternating-current bus of the pump, which converts the direct current generated by the solar module into alternating current and injects same into the pump power line, with the same values of voltage, frequency and phase-angle deviation as the current from the distribution network, when the timer activates the operation of the pump.