ARMORED SUBMERSIBLE Power CABLE > 자유게시판

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The UNICONN™ motor controller can include control performance for VSD items reminiscent of goal speed, minimal and maximum speed and base pace (voltage divided by frequency); three jump frequencies and bandwidths; volts per hertz sample and begin-up increase; means to begin an ESP while the motor is spinning; acceleration and deceleration rates, including start to minimal pace and minimum to focus on speed to keep up constant strain/load (e.g., from about 0.01 Hz/10,000 s to about 1 Hz/s); cease mode with PWM service frequency; base velocity voltage choice; rocking start frequency, cycle and sample management; stall protection with automatic speed discount; altering motor rotation direction with out stopping; speed force; speed follower mode; frequency management to take care of constant velocity, strain or load; present unbalance; voltage unbalance; overvoltage and undervoltage; ESP backspin; and leg-floor. The SPEEDSTAR™ MVD control circuitry can embrace a plug-and-play sine wave output filter, a multilevel PWM inverter output, a 0.95 energy issue, programmable load discount (e.g., gentle-stall perform), speed management circuitry to keep up fixed load or stress, rocking start (e.g., for caught pumps resulting from scale, sand, and many others.), a utility power receptacle, an acquisition system for the PHOENIX™ monitoring system, a site communication field to help surveillance and control service, a speed management potentiometer.

The SPEEDSTAR™ MVD control circuitry is appropriate for indoor or outside use and comes customary with a visible fused disconnect swap, precharge circuitry, and sine wave output filter (e.g., integral sine wave filter, ISWF) tailor-made for control and safety of high-horsepower ESPs. The VSD unit 270 might embrace surge and lightening protection (e.g., one protection circuit per part). For connection to a power cable or motor lead extensions (MLEs), a motor could embrace a pothead. For instance, a motor may include dielectric oil (e.g., or dielectric oils), for example, that may assist lubricate one or more bearings that support a shaft rotatable by the motor. The electrical windings could also be formed from magnet wire that features an electrical conductor and no less than one polymeric dielectric insulator surrounding the electrical conductor. As to the cable jacket 470, it may be round or as proven in the instance 401, rectangular (e.g., "flat").

For instance, an ESP cable (e.g., ESP energy cable) could also be rated at, for example, about 3 kV, about 4 kV, or about 5 kV (e.g., low voltage armored power cable or extra) and may have a kind issue that's flat or round. For example, a spherical kind factor cable could also be used in an software the place there's sufficient room in a bore. As an choice, nanoscale fillers may be included for low resistivity and suitable mechanical properties (e.g., for high temperature thermoplastics). XLPE is a crosslinked polyethylene with acceptable mechanical, thermal, and dielectric properties. As an example, a polymeric insulation layer may embody a single layer or a number of layers of dielectric tape that could be helically wrapped around an electrical conductor and that could be bonded to the electrical conductor (e.g., and to itself) via use of an adhesive. Further monitoring of power high quality from a supply, to a motor, at a motor, could occur by a number of circuits or options of a controller. In the example of FIG. 2, the motor controller 250 consists of various options to handle, for example, backspin of an ESP, sanding of an ESP, flux of an ESP and fuel lock of an ESP.

As an example, a motor housing might include slot liners. HDESPs may handle a wide number of fluids and, for example, as much as about 2% sand, coal, fines and H2S/CO2. HDESPs discover use in low-liquid-fee coalbed methane and other oil and fuel shallow wells that benefit from synthetic carry to remove water from the wellbore. A number of layers could also be supplied, for example, to create an impermeable fuel barrier. As an example, the VSD unit 270 might receive power with a voltage of about 4.16 kV and management a motor as a load with a voltage from about zero V to about 4.16 kV. For a LVD, a VSD unit can embrace a step-up transformer, management circuitry and a step-up transformer whereas, for a MVD, a VSD unit can include an integrated transformer and control circuitry. The SPEEDSTAR™ MVD control circuitry can optionally interface with the UNICONN™ motor controller, which may present among the foregoing functionality. Such a motor could also be appropriate for implementation in varied types of environments. A motor may be configured to incorporate an oil reservoir, for example, in a base portion of a motor housing, which can allow oil to broaden and contract with vast thermal cycles.