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
CAUTION
•
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.
