Posted on June 1, 2012 - ( views)
So far equipotential bonding and lightning equipotential bonding of pipes in explosion-hazard areas has been implemented by means of welded or threaded bushing connections. Using clamps was only permitted if evidence of no ignition sparking in case of lightning current loading was provided. Such proof has now been rendered for a pipe clamp by DEHN + SÖHNE.
In compliance with and tested according to EN 50164-1 (VDE 0185-201) title English: Lightning Protection Components (LPC) - Part 1: Requirements for connection components in a potentially explosive atmosphere (clamps and connectors), the sample passed the test for no occurrence of ignition sparks at a lightning current loading of up to 50 kA (10/350 µs). This new pipe clamp for explosion-risk areas not only ensures the safe electrical contact by means of two contact clips, but also the adequate mechanical fixing by an electrically insulated clamping body.
The Ex pipe clamp provides following connection possibilities
– round conductors made of Cu, St/tZn, Al, StSt with Ø8 mm or stranded copper conductors, cross section 16-35 mm², with E-Cu crimping cable lug (DIN 46235)
– flat copper conductors with minimum dimensions of 20x2.5 mm and a bore of Ø10.5 mm
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