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- Growler_(electrical_device) abstract "A growler is an electrical device used for testing insulation of a motor for shorted coils. A growler consists of a coil of wire wrapped around an iron core and connected to a source of AC current. When placed on the armature or stator core of a motor the growler acts as the primary of a transformer and the armature coils act as the secondary. A "feeler", a thin strip of steel (hacksaw blade) can be used as the short detector.The alternating magnetic flux set up by the growler passes through the windings of the armature coil, generating an alternating voltage in the coil. A short in the coil creates a closed circuit that will act like the secondary coil of a transformer, with the growler acting like the primary coil. This will induce an alternating current in the shorted armature that will in turn cause an alternating magnetic field to encircle the shorted armature coil. A flat, broad, flexible piece of metal containing iron is used to detect the magnetic field generated by a shorted armature. A hacksaw blade is commonly used as a feeler. The alternating magnetic field induced by a shorted armature is strong at the surface of the armature, and when the feeler is lightly touched to the iron core of an armature winding, small currents are induced in the feeler that generate a third alternating magnetic field surrounding the feeler. With the growler energized, the feeler is moved from slot to slot. When the feeler is moved over a slot containing the shorted coil, the alternating magnetic field will alternately attract and release the feeler, causing it to vibrate in synch with the alternating current. A strong vibration of the feeler accompanied by a growling noise indicated that the coil is shorted.Along with the standard application the growler can be used to: test series and interpoles (commutating) fields from a DC motor to determine phasing and polarity in multiwinding armatures to test rotors in rotating frequency changers, as well as in wound rotors to test shorts between turns in taped coils before installation into an armature or a stator as a low voltage isolation transformer as a high voltage autotransformer bucking or boosting for numerous tests on various types of equipment for preheating or baking armatures and rotors.".
- Growler_(electrical_device) thumbnail Growler_silver_beauty.JPG?width=300.
- Growler_(electrical_device) wikiPageID "4135179".
- Growler_(electrical_device) wikiPageRevisionID "599345858".
- Growler_(electrical_device) hasPhotoCollection Growler_(electrical_device).
- Growler_(electrical_device) subject Category:Electric_motors.
- Growler_(electrical_device) subject Category:Electrical_test_equipment.
- Growler_(electrical_device) subject Category:Tools.
- Growler_(electrical_device) subject Category:Transformers_(electrical).
- Growler_(electrical_device) type Artifact100021939.
- Growler_(electrical_device) type Device103183080.
- Growler_(electrical_device) type ElectricMotor103273061.
- Growler_(electrical_device) type ElectricMotors.
- Growler_(electrical_device) type Implement103563967.
- Growler_(electrical_device) type Instrumentality103575240.
- Growler_(electrical_device) type Machine103699975.
- Growler_(electrical_device) type Motor103789946.
- Growler_(electrical_device) type Object100002684.
- Growler_(electrical_device) type PhysicalEntity100001930.
- Growler_(electrical_device) type Tool104451818.
- Growler_(electrical_device) type Tools.
- Growler_(electrical_device) type Whole100003553.
- Growler_(electrical_device) comment "A growler is an electrical device used for testing insulation of a motor for shorted coils. A growler consists of a coil of wire wrapped around an iron core and connected to a source of AC current. When placed on the armature or stator core of a motor the growler acts as the primary of a transformer and the armature coils act as the secondary.".
- Growler_(electrical_device) label "Growler (electrical device)".
- Growler_(electrical_device) sameAs m.0bk_r0.
- Growler_(electrical_device) sameAs Q5611686.
- Growler_(electrical_device) sameAs Q5611686.
- Growler_(electrical_device) sameAs Growler_(electrical_device).
- Growler_(electrical_device) wasDerivedFrom Growler_(electrical_device)?oldid=599345858.
- Growler_(electrical_device) depiction Growler_silver_beauty.JPG.
- Growler_(electrical_device) isPrimaryTopicOf Growler_(electrical_device).
