Protective earth

Mounting material required for proper installation of the protective earth

• Ring cable lug for M4

The protective earth is established via the connection between the ground connection of the device and the mounting plate on the control cabinet. The economy variable frequency drive has two ground connections [2] on the bottom flange of the device. The connection is made via a cable with a ring-shaped cable lug [1]. Use the same cross-section of the supply cable to connect the second protective earth conductor.

Single device

►Assemble cables with a sufficient cross-section using a ring-shaped cable lug [1]

►Align cable with cable lug [1] to one of the two ground connections [2] of the economy variable frequency drive

►Fix the cable lug [1] to the economy variable frequency drive with the pre-assembled screw [2]

►Observe tightening torques

Components	Tightening torque [Nm]
Screws M4x8 Strength class 8.8	2

►Clean the contact surfaces

►Ensure that the mounting plate is not painted.

►Attach the ready-made cable properly to the control cabinet mounting plate.

Drive system

In a drive system, multiple devices can be grounded by connecting the grounding terminals.

►Align the cable lugs of the connection cable [2] so that they can be connected to the ground connection output of a economy variable frequency drive [1] and a ground connection input of the next device [3]

►Secure the cable lugs to the devices using the pre-assembled fixing screws [1] [3]

►Observe tightening torques

Components	Tightening torque [Nm]
Screws M4x8 Strength class 8.8	2