ABB REG316 4 Series Operating Instructions Manual page 606

ABB Switzerland Ltd
C.t. and v.t. leads to the terminals can be secured, for exam-
ple, to a surface (steel or copper) using conduit clamps. The
surface (e.g. floor plate) must be in direct contact with the
plant ground and the cable screens must make good contact
with the conduit clamps all the way round.
b) This, however, is not always the case and the screen is fre-
quently not in contact at the sides which impairs the screen-
ing effect. To overcome this drawback, a special ** copper
braid tape can be wound on top of the cable screen in the
region of the clamps. This then ensures maximum screening
efficiency.
To prevent corrosion, a Cupal disc (copper-plated aluminium)
must be inserted between aluminium and copper parts.
7-8
REG 316*4 1MRB520049-Uen / Rev. C