Maintenance 107 Grounding power module with grounding hookSince the power modules are on a floating potential, one must check at the moduleterminals for residual voltages before starting work at the modules.Required tools• Voltmeter or multimeter with impedance of >=10 Mohm (not part of supply)• Voltage divider probe (not part of supply)• Grounding hook (part of supply)The grounding hook is attached to the left side wall inside the COU cabinet. The otherend of the PE cable is fixed to the PE busbar (see the figure below). The length of thePE cable is 4.5 m or 6 m, depending on the drive type.Grounding hook in stowed position121 Grounding hook2 Grounding cable connected to PEbusbar
