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From PDHengineer. com-Decatur Professional Development, LLC
Sanitary and Industrial Wastewater Collection - Pumping Systems
...internal combustion engines in pumping stations Uses of adjustable speed pumps The Hazen-Williams formula Recommended velocities in sewer lines How to solve for head losses How to solve for the Total Dynamic Head (TDH) How to find the efficiency of a pump Pump Cavitation Pump vortex How to determine the water hammer How to solve for critical time of a pump The affinity
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...internal combustion engines in pumping stations Uses of adjustable speed pumps The Hazen-Williams formula Recommended velocities in sewer lines How to solve for head losses How to solve for the Total Dynamic Head (TDH) How to find the efficiency of a pump Pump Cavitation Pump vortex How to determine the water hammer How to solve for critical time of a pump The affinity
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Highly Reliable Electrical Power for Information Systems
...state lighting ballasts, and power conversion sections of adjustable frequency drives increase the need for power systems engineers to thoroughly address harmonic distortion and its role in overall power quality. The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to obtain PDH credits. Specific Knowledge or Skill Attained This
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...state lighting ballasts, and power conversion sections of adjustable frequency drives increase the need for power systems engineers to thoroughly address harmonic distortion and its role in overall power quality. The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to obtain PDH credits. Specific Knowledge or Skill Attained This
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Direct Current Motors and Generators
...enerated by magnetic reaction, and the armature revolves. Adjustable speed is difficult to obtain with motors whose armatures are connected to fixed frequency power lines (AC motors). Here is where DC motors shine; their rotating field speed depends on the rotor speed itself. The speed of DC series motors varies with load, and torque varies inversely with speed. This makes them particularly
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...enerated by magnetic reaction, and the armature revolves. Adjustable speed is difficult to obtain with motors whose armatures are connected to fixed frequency power lines (AC motors). Here is where DC motors shine; their rotating field speed depends on the rotor speed itself. The speed of DC series motors varies with load, and torque varies inversely with speed. This makes them particularly
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Industrial Fan Fundamentals
...ons of instability Motors, belt drives, gear drives and adjustable speed drives Mitigating start-up current and torque issues Fan maintenance and common fan system problems, including contaminant build-up, noise, duct leakage, fan degradation and unstable operation Operation of multiple fans in series and parallel arrangements Calculation of fan system electrical operating costs
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...ons of instability Motors, belt drives, gear drives and adjustable speed drives Mitigating start-up current and torque issues Fan maintenance and common fan system problems, including contaminant build-up, noise, duct leakage, fan degradation and unstable operation Operation of multiple fans in series and parallel arrangements Calculation of fan system electrical operating costs
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