Why do Megger MT1700 Teaters Measure IR to 999 Megohms

[JaegerZero1984]

I have got a new Mt1720 Megger tester and it measures to 999 Megohms. the old one my boss loaned out to me and my assesment testers only go up to 299 Megohms. Why do they go so high now?

 

[Moley]

199MΩ is plenty; >199MΩ is perfectly adequate. Anything more is just showing off.

Depends on what you are testing. We are normally testing HV switchgear.

 

[ipf]

No one would notice if I waved that about

Ewe, maybe!

 

[buzzlightyear]

the old Megger used to say 299meg on 230v and 500v ,so megger decided it to put 999 meg so that you would not get confused on testing to infinity and beyond .