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VDL (E3.1) 10/2020 Page 67/196
How to achieve equipotential bonding when installing the VDL with a pump module is de-
scribed in detail in the mounting instructions for the pump module (Art. No. 7001-0137) sup-
plied with the pump module.
Achieving equipotential bonding on the VDL
Equipotential bonding must always be made via external grounding connections, so that no potential can
be introduced in the event of a short circuit. Following the installation of the VDL and having imple-
mented all the measures described to achieve equipotential bonding, we recommend performing a
protective conductor measurement before commissioning.
The VDL provides a threaded bushing for grounding on the bottom
left of the rear panel. In state of delivery the screw together with the
washer and spring washer is screwed on the threaded bushing.
Unscrew the screw.
Threaded bushing after unscrewing
Washer, spring washer, screw
Put the washer, the ring cable lug of the grounding cable and the
spring washer in this order onto the screw.
OR
Put the spring washer, the ring cable lug of the grounding cable, and
the washer directly onto the housing (recommended because this
creates minimum resistance)
Screw on the screw into threaded bushing.
Connected grounding cable
Figure 19: Mounting the grounding cable on the VDL
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