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2. Shading coil - Wikipedia

   en.wikipedia.org/wiki/Shading_coil

   Shading coil. A shading coil or shading ring (Also called Frager spire or Frager coil) is one or more turns of electrical conductor (usually copper or aluminum) located in the face of the magnet assembly or armature of an alternating current solenoid. The alternating current in the energized primary coil induces an alternating current in the ...

3. Contactor - Wikipedia

   en.wikipedia.org/wiki/Contactor

   A contactor is an electrically controlled switch used for switching an electrical power circuit. [1] A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch. Unlike general-purpose relays, contactors are designed to be ...

4. NEMA size - Wikipedia

   en.wikipedia.org/wiki/NEMA_size

   NEMA size. NEMA (National Electrical Manufacturers Association) contactors and motor starters are rated by sizes. These sizes are grouped by rated current and power. [1][2] NEMA size. Max. continuous amperes. Max. HP at 200 V, AC. Max. HP at 230 V, AC.

5. Armature (electrical) - Wikipedia

   en.wikipedia.org/wiki/Armature_(electrical)

   Armature (electrical) A DC armature of a miniature motor (or generator) A partially-constructed DC armature, showing the (incomplete) windings. In electrical engineering, the armature is the winding (or set of windings) of an electric machine which carries alternating current. [1] The armature windings conduct AC even on DC machines, due to the ...

6. Korndörfer autotransformer starter - Wikipedia

   en.wikipedia.org/wiki/Korndörfer_Autotransformer...

   The Korndorfer starter can be used manually. Newer devices provide full automatic operation, which in addition would have: triple-pole line contactor (switch), start contactor, running contactor, three single-pole overload relays, autotransformer with a set tap-changing links, a suitable timer, and start and stop pushbuttons.

7. NEMA contact ratings - Wikipedia

   en.wikipedia.org/wiki/NEMA_contact_ratings

   NEMA contact ratings are how much current at a rated voltage a relay or other pilot device can switch. The current rating of smaller NEMA contactors or their auxiliaries are defined by NEMA ICS 5: Industrial Control and Systems, Control Circuit and Pilot Devices[1] standard. The nomenclature is a letter followed by a three-digit number, the ...