ABB SF6 LTB 245E1 BLG 1002A - Maintenance Category B

Inspection intervals Operating and Maintenance Instructions
10
1HSB435409-100 en1
3.3 Maintenance category B
To be inspected Inspection interval Measures / Instructions / Tools
1.
Ocular inspection 3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Check external cleanliness, heater
element function, gas pressure, valves
and drainage holes.
No special tools needed.
See Chapter 2.1.3 and Chapter 2.1.4
and 1HSB515409-100 for BLG 1002A
or 1HSB535409-100 for BLK 222.
2.
Rating plates 3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Make a note of the serial number.
3.
Operation counter 3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Make a note of the number of
operations.
4.
Visual inspection in
operating mechanism
3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Look for loose bolts and nuts, oil leaks
from dashpots.
If leakage replace the complete
dashpot.
No tools necessary.
See Manual 1HSB515409-100 for BLG
1002A or 1HSB535409-100 for BLK
222.
5.
Corrosion inspection
Rust protection
3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Visual inspection.
Rust stains polished off and treated
with rust protection.
See Chapter 2.2.4 .
6.
Greasing 3-6 years or 2,000 mech. CLOSE/
OPEN operations.
Circuit-breaker in open position, closing
springs discharged. Greasing of the
worm gear ( only BLG 1002A) and
shafts in latches in the operating
mechanism with grease “M”.
See Chapter 2.1.5 ,Chapter 2.2.3 and
Manual 1HSB515409-100 for BLG
1002A or 1HSB535409-100 for BLK
222.