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

Inspection intervals Operating and Maintenance Instructions
12
1HSB435409-100 en1
3.4 Maintenance category C
To be inspected Inspection interval Measures / Instructions / Tools
1.
Ocular inspection 15 years or 5,000 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 15 years or 5,000 mech. CLOSE/
OPEN operations.
Make a note of the serial number.
3.
Operation counter 15 years or 5,000 mech. CLOSE/
OPEN operations.
Make a note of the number of
operations.
4.
SF
6
gas
• Filling of gas (if
necessary)
• Dew point at normal
gas pressure in the
circuit-breaker.
15 years or 5,000 mech. CLOSE/
OPEN operations.
Gas filling equipment.
See Assembly instruction for applicable
circuit-breaker, ch 6.
Dew point maximum - 5 ˚C at rated
filling pressure and + 20 ˚C
temperature.
5.
Insulators
• Visual inspection and
cleaning.
15 years or 5,000 mech. CLOSE/
OPEN operations.
Spray and rub the insulators clean.
Check cementing, bolts and nuts.
Spray equipment, clothes and
wrenches.
See Chapter 2.1.4