What is a growler tester?
A growler is an electrical device primarily used for testing a motor for shorted coils. A growler consists of a coil of wire wrapped around an iron core and connected to a source of alternating current.
How would you locate a shorted coil in an armature?
The first check to see if your armature windings are shorted is the “180° Resistance” test. A volt/ohm meter can be used to check the resistance of the series windings connected between the two commutator bars of each coil.
What is the purpose of a growler?
A beer growler is a container or vessel that is used for the transport of beer. It can also be described as an air-tight jug, typically made out of glass, ceramic or stainless steel that allows you to take draft beer from one place to another without a degradation of quality.
What does growler mean?
Definition of growler 1 : one that growls. 2 : a container (such as a can or pitcher) for beer bought by the measure. 3 : a small iceberg.
How do you do a growler test?
The two test probes are placed on adjacent commutator segments and the meter reading noted. Keeping the armature stationary in the growler’s jaws, the two probes are ‘walked’ around the commutator segments until the highest reading is obtained.
Why do armatures fail?
Worn commutators are one of the most common causes of armature failure. When commutators become worn or damaged, they wear down carbon brushes much quicker which can result in a damaged or destroyed armature.
What happens if armature is short circuited when it is running?
The circuit with the ground and the short circuit between own starter motor does not turn because there are not enough windings. In the latter, the motor turns but there are magnetic fields. This is also called as short circuit fault.
Which instrument is used to measure the armature winding resistance?
Answer. The windings resistance can be directly measured with an ohmmeter.
Why is it called growler?
Beer Growler The most common was a 2-quart galvanized or enameled pail. These “growlers” supposedly got their name because as the beer sloshed around, it caused the carbon dioxide to escape and created a growling noise.
What volume is a growler?
If you drink beer regularly, especially from craft breweries, you’ve probably heard of a growler. It’s the 32- or 64-ounce airtight beer vessel made of glass that functions like a small keg.
What size is a growler?
64-ounce
If you drink beer regularly, especially from craft breweries, you’ve probably heard of a growler. It’s the 32- or 64-ounce airtight beer vessel made of glass that functions like a small keg.
What is a armature tester?
Desk mounted armature tester/growler with meter indication. For locating shorts, open circuits and grounds in armatures from 10-200 mm diameter. With a built in check meter for checking reverse coils, defective windings etc. Complete with probes for commutator ground test, switch and test leads.
How do I know if my armature is bad?
Signs of a bad armature Burnt-out armature: It may be the result of several issues like poor airflow, overloading, stalling, earthing, insulation breakdown, regulator failure, and so forth. If a burnt-out armature is the problem, you will have to rewind the armature.
What is the reason behind short circuit in armature?
The short circuit is caused by a buildup of dirt, copper particles, and debris between commutator segments. The segments are then shorted together resulting in arcing between the brushes. A flashover can be catastrophic to the motor and motor brushes.