Replacing Surge Arresters - Siemens SINAMICS MV 9LD4110-7EX70-1AA0 Operating Instructions Manual

Maintenance
9.6 Repairs
To disconnect the fiber-optic cables, proceed as follows:
1. Carefully unscrew the knurled nut
2. Pull the fiber-optic cable
3. Insert the new fiber-optic cable as far as it will go. If correctly fitted, the white ID ring must be
flash with the opto-transmitter or opto-receiver.
4. Tighten the knurled nut
9.6.7

Replacing surge arresters

To replace the surge arrester, proceed as follows:
1. Release the screws.
2. Remove the defective surge arrester.
3. Insert the new surge arrester.
4. Screw the surge arrester in place with the following torque:
3EK7 = 40 Nm
3EJ2 = 70 Nm
The surge arrester must not be subject to a transverse force greater than 370 N.
134
①
.
②
out.
①
again by hand.
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818