The a.c. component of the test current shall, in principle, be equal to the a.c. component of
the rated short-time withstand current (I
k
) of the switchgear and controlgear. The peak current
(for a three-phase circuit, the highest value in one of the outer phases) shall be not less than
the rated peak withstand current (I
p
) and shall not exceed it by more than 5 % without the
consent of the manufacturer.