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A typical motor start capacitor. A motor capacitor [1] [2] is an electrical capacitor that alters the current to one or more windings of a single-phase alternating-current induction motor to create a rotating magnetic field. [citation needed] There are two common types of motor capacitors, start capacitor and run capacitor (including a dual run ...
NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power . [ 1 ] [ 2 ]
Some film capacitors of special shapes and styles are used as capacitors for special applications, including RFI/EMI suppression capacitors for connection to the supply mains, also known as safety capacitors, [16] snubber capacitors for very high surge currents, [17] motor run capacitors and AC capacitors for motor-run applications. [18]
IEC 60252 AC motor capacitors; IEC 60254 Lead-acid traction batteries; IEC 60255 Measuring relays and protection equipment; IEC 60258 Direct acting recording electrical measuring instruments and their accessories; IEC 60261 Sealing test for pressurized waveguide tubing and assemblies
The IEEE 315 standard contains a list of Class Designation Letters to use for electrical and electronic assemblies. For example, the letter R is a reference prefix for the resistors of an assembly, C for capacitors, K for relays. Industrial electrical installations often use reference designators according to IEC 81346.
In electrical engineering, a capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other. The capacitor was originally known as the condenser , [ 1 ] a term still encountered in a few compound names, such as the condenser microphone .
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