The Megger® BM15 & MJ15 are compact 5 kV insulation testers. They are very simple to use and provide a quick and accurate reading of insulation resistance.

The instruments use an analogue display with a maximum reading of 20 G½. The BM15 is powered by batteries. The MJ15 has an additional hand-cranked generator. The instrument operation is extremely simple. A voltage range enables measurement of a.c. or d.c. conductor potential. Four test voltages are available at 500 V, 1 kV, 2,5 kV and 5 kV. A choice of push buttons is supplied; a locking button simplifies long term testing, or a nonlocking version is preferred for maximum safety. A bezel allows a scale plate overlay to be added with pass/fail bands for go/no go testing. This is particularly useful for less experienced users and enables a rapid decision to be made.