GR3/4 Armature Growlers
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.
GR3 Model with 110V single phase voltage supply
GR4 Model with 230V single phase voltage supply
Growlers will work on any armature where the coil can be isolated magnetically. Typically these are found in DC armatures, though some AC rotors, depending on how they are wound, may also be tested. In an AC motor, if there is a squirrel cage or other type of ring that prevents individual coils from being isolated magnetically, then this may interfere with a growler’s ability to function