Testing of electrical systems or of systems requiring inspection denotes the guarantee of the function and security by the use of suitable measuring procedures when establishing, implementing, extending or changing such plants. These measures may only be accomplished by a professional of electrical engineering with the help of appropriate and required measuring instruments.
Before transferring electrical plants to the operator of the plant every manufacturer is obligated to perform and to record an inspection of the first start-up. After the transfer of every electric plant the operator is responsible for sticking to the test intervals required by law or for gearing the test intervals to the needs of it.
With the help of numerous check lists and the recorded measurement results the status of an electric plant is depicted. On the basis of these check lists and protocols the skilled professional electric engineering can state if the plant corresponds to the legal rules and norms.