Megger Major Insulation tester - UK Vintage Radio Repair and Restoration Discussion Forum

Puffie40 · 4th Sep 2019, 6:03 pm

I picked up a Megger Major from a retiring small-time electrican. It is a 1000 volt, hand crank insulation tester, and is in pretty good cosmetic shape for its age.

From using it, I have observed The needle goes past zero ohms and not quite to infinity ohms, which, from what I gather from threads here, is a fairly common issue. Is there a capacitor inside this model I should consider replacing? I am reluctant to break the lead seals to get inside.

Is there a copy of the manual someone would like to share?

Thanks!
Chris

Barnmead · 5th Sep 2019, 8:43 pm

Have a look at the Biddle site. The American version of the Major Megger is cat 21159. Perhaps not identical but the description and fault finding could be helpful.

4th Sep 2019, 6:03 pm	#1
Puffie40 Retired Dormant Member Join Date: Sep 2019 Location: Cranbrook, British Columbia, Canada Posts: 1	Megger Major Insulation tester I picked up a Megger Major from a retiring small-time electrican. It is a 1000 volt, hand crank insulation tester, and is in pretty good cosmetic shape for its age. From using it, I have observed The needle goes past zero ohms and not quite to infinity ohms, which, from what I gather from threads here, is a fairly common issue. Is there a capacitor inside this model I should consider replacing? I am reluctant to break the lead seals to get inside. Is there a copy of the manual someone would like to share? Thanks! Chris

5th Sep 2019, 8:43 pm	#2
Barnmead Pentode Join Date: Dec 2002 Location: Norfolk, UK. Posts: 168	Re: Megger Major Insulation tester Have a look at the Biddle site. The American version of the Major Megger is cat 21159. Perhaps not identical but the description and fault finding could be helpful. __________________ Richard