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2. Three-phase electric power - Wikipedia

   en.wikipedia.org/wiki/Three-phase_electric_power

   A three-phase induction motor has a simple design, inherently high starting torque and high efficiency. Such motors are applied in industry for many applications. A three-phase motor is more compact and less costly than a single-phase motor of the same voltage class and rating, and single-phase AC motors above 10 hp (7.5 kW) are uncommon. Three ...

3. Siemens ACS-64 - Wikipedia

   en.wikipedia.org/wiki/Siemens_ACS-64

   3-phase, AC, fully suspended, Siemens built (Norwood, Ohio) Head end power: 1,000 kW (1,340 hp) 3-phase, 60 Hz, 480 VAC, 1,000 kVA: Transmission: Pinion Hollow Shaft Drive w/ Partially Suspended Gearboxes: MU working: Yes: Loco brake: Regenerative braking, NYAB Electro-Pneumatic Cheek Mounted Disk Brakes: Train brakes: Electro-pneumatic [1 ...

4. NEMA size - Wikipedia

   en.wikipedia.org/wiki/NEMA_size

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5. Motor soft starter - Wikipedia

   en.wikipedia.org/wiki/Motor_soft_starter

   Typically, the voltage is controlled by reverse-parallel-connected silicon-controlled rectifiers , but in some circumstances with three-phase control, the control elements can be a reverse-parallel-connected SCR and diode. [2] [3] Another way to limit motor starting current is a series reactor. If an air core is used for the series reactor then ...

6. Variable-frequency drive - Wikipedia

   en.wikipedia.org/wiki/Variable-frequency_drive

   Small variable-frequency drive Chassis of above VFD (cover removed). A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable voltage variable frequency drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the ...

7. Motor control center - Wikipedia

   en.wikipedia.org/wiki/Motor_control_center

   A small, early 1960s-vintage motor control center for 480 volt motors. A motor control center ( MCC ) is an assembly to control some or all electric motors in a central location. It consists of multiple enclosed sections having a common power bus and with each section containing a combination starter, which in turn consists of motor starter ...