DC link connection

If the following conditions are met, a fuse in the DC link is not required:

• The DC link connection is protected by the line fuses located upstream of the inverter(s). Note that the value of the DC link current can be 1.25 times the value of the line current. It is a good idea to have a DC link connection with the maximum permitted terminal cross section of the connected devices.
• With reduced cable cross section, the maximum permitted cable length from the first to the last unit is 3 m, the risk of short circuits is reduced to a minimum and the cable is not routed close to combustible substances.

The length of the DC link connection must be kept as short as possible.