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Self-traceable voltage divider

PTBnews 1.2019
Especially interesting for

calibration laboratories

research institutes

The voltage divider: The Perspex tube contains 99 high-precision resistors that can be connected either in series or in parallel.

Accurate measurements of high voltages in the range of 200 kV require the use of voltage dividers. These devices divide high voltages into smaller ones that can only then be accurately measured. The size of the signal is determined by the scale factor. Up to now, this factor had to be determined by regularly calibrating the voltage dividers against national standards. At PTB, a self-traceable voltage divider has now been developed. It provides testing laboratories with a flexible tool. Its main principle is that seriesconnected resistors can be connected in parallel and adjusted. In this way, it is possible to save both operating expenses and time since there is no need for transporting the equipment to a metrology institute and setting it up there. (Technology Offer 484)


allows the scale factor of a voltage divider to be checked directly

fast: traceability is achieved within an hour

improved measurement uncertainty due to shorter traceability chain

Contact person for questions about technology transfer

Andreas Barthel, Phone: +49 531 592-8307, Opens window for sending emailandreas.barthel(at)ptb.de, Opens internal link in current windowwww.technologietransfer.ptb.de/en