Experiences with stationary and mobile calibration laboratories

Publication IEC 60060-2 recommends the requirements on the measuring equipment of high voltage laboratories. The operators of the laboratory have to assure that the measuring uncertainties stay within the prescribed limits. The inspections are preferably done by an accredited laboratory through comparison with a reference measuring system which is traceable to national standards. A high voltage calibration laboratory is illustrated, which can be operated either stationary in a high voltage laboratory or mobile on-site. The type of equipment and the necessary procedures for the performance checks and tests are described. The experiences after two years of operation are summarised. Moreover the operating costs and recalibration intervals are commented upon.