Recovery Voltage Meter (RVM) – B&C

Hungarian developed measuring instrument for testing the general condition of oil-paper insulation systems. The “Hungarian method”. One of the owners of our company, B&C Kft., produced it for the whole world under the brand name Tettex.

Light, portable device with adjustable measuring voltage between 200 and 2000V. The moisture content and aging state of the paper can be deduced by examining the polarization spectrum of the oil-paper system. It also has an insulation resistance measuring function.

Recommended for testing oil-paper transformers and paper cables. (At the international level, attempts are being made to extend the use of the instrument to the testing of polyethylene cables, too.).
Product leaflet


More details:

This instrument was primarily developed for the examination of the general condition of oilpaper insulation systems. It’s a light, portable device with test voltage adjustable between 200 V and 2000 V.
By testing the polarization spectrum of an oilpaper insulation system, one can deduce the moisture content and aging state of the paper.
RVM 22 also has an insulation resistance measuring function.

This device is the improved version of RVM 5461, 5462a and RVM PDC.

In addition to conducting polarization tests taken by the so-called recovery voltage measurement method, RVM 22 is able to register polarization and depolarization currents, record unique recovery voltage curves as well as to measure insulation resistance.
Due to the connectors with IP65 protection on the back of the device, RVM 22 can also be operated with its lid down, which might be useful during a longer unattended measurement.
The instrument is the product of B&C Diagnostics Ltd. It is made in Hungary, and its sole distributor is Diagnostics Ltd.

Comfortable, rainproof connections: