46
Installation and commissioning guide
2750 515-1 EN, REV. 14, 2020-06-26
4.7.2 Installation of the bushing on the transformer at site
Procedure
1. Apply locking fluid on the threads (39) on the
lower draw rod (4).
• If the bottom contact is removed from the
lower draw rod (4): apply locking fluid on the
threads (56).
Make sure that the guiding cone (62) is in
position.
CAUTION!
Make sure that all joints in the draw rod
are locked with thread-locking fluid.
NOTE!
Use thread-locking fluid grade 42 and
activator grade 47.
G005042
2.
Connect the upper draw rod (35) to the lower
draw rod (4).
G005038
3.
Make sure that the joint is correctly threaded:
1. Measure the distance H and compare it to
the nominal distance H.
2. Calculate the nominal distance:
H = L - 25 mm (± 2 mm).
Refer to the rating plate for the distance L.
3. Record the measured distance H and keep it
with the substation documentation, refer to
Measurement record, page 87.
NOTE!
When the joint is correctly threaded,
2 threads on the upper (60) and
lower (39) threads are visible.
G006282
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