T1689 Technical Manual Rev 07 Maintenance
MV3000 Air Cooled DELTA Removal of Modules for service or repair
Page 143
8.4.6 Removal Of A DELTA Rectifier Module
• The modules are delicate and vulnerable to damage – handle carefully.
- Only lift or move them by use of the lifting point.
- Lay them down on the plain left-hand face when not fitted in a frame.
- Do not leave modules unsupported in the upright position.
A DELTA rectifier module should be removed from the enclosure by following the steps below. Refer to Section
5: CDM Assembly, for further information:
8.4.6.1 Removal Of Electrical Connections
a) Remove the terminal shrouds;
b) Disconnect the control connections by unplugging the connector;
c) Disconnect the a.c. phase cables or busbars, first noting their positions;
d) Disconnect the d.c. cables or busbars;
e) Disconnect the earth cable (if fitted).
8.4.6.2 Removal Of The Module
a) Remove four M6 fixing screws (two from the top of the module and two from the bottom);
b) Slide the module forwards until the stop pin is reached;
c) Connect a suitable crane shackle to the lifting hole in the top of the module;
d) Take up the weight of the module, lift it over the stop pin and withdraw from the enclosure;
e) Move the module into a safe position with its left hand side (when viewed from the front) laid on a flat
surface.
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