Inspection intervals
Operating and Maintenance Instructions
8
1HSB435409-100 en1
3.1 Maintenance summary
Explanations:
1.
Mech. oper. = Mechanical Close-Open operations.
2.
CLOSE/OPEN oper. with el load = Close-Open operations with electrical
loading.
3.
Special requirements for resistance check of circuit-breakers operated
< 100 CLOSE/OPEN operations/year.
Type of measure
Inspection interval
Explan-
ation
Condition of
circuit-
breaker
during work
Com-
petence
require-
ments
A
Ocular inspection
1-2 years
a1
a2
B
Preventive maintenance
Intermediate check
•
Operation test including
timing test
•
Thermovision check
•
Greasing of Wormgear
3-6 years or 2,000 mech.
CLOSE/OPEN operations.
1)
b1
b2
C
Preventive maintenance
•
General check of circuit-
breaker and operating
mechanism
15 years or 5,000 mech.
CLOSE/OPEN operations.
1), 3)
b1
b2
D
Overhaul
•
Overhaul of breaking
chambers
•
Line and transformer
circuit-breakers
•
Capacitor-reactor and filter
circuit-breakers
•
Not synchronized
•
Synchronized
•
Major overhaul
2,500 CLOSE/OPEN op.
with el. load.
5,000 CLOSE/OPEN op.
with el. load.
30 years or 10,000 mech.
CLOSE/OPEN operations.
2)
1)
c1
d1
c2
c2
LTB 245E1:
Σ
nxI
2
=20,000
LTB 420E2:
Σ
nxI
1.9
=20,000
Summary of Contents for SF6 LTB 245E1 BLG 1002A
Page 1: ...Product Manual 1HSB435416 2 en Rev 1 LTB 245E1 BLG 1002A 3 pole operation ...
Page 92: ...ABB Switchgear SF6 Circuit Breaker Circuit breakers HPL and LTB 1HSB445409 1 en0 Lubricants ...
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