Operating Mechanism Maintenance
1HSB515409-100 en rev2
19
4.9.1 Closing dashpot
Check the oil level in the dashpot by recording the damping effect during operation.
•
Connect the circuit-breaker analyser’s sensor to the cam shaft in the operating
mechanism and record a damping curve. Check the damping distance and the
damping time as set out in
Figure 4-11
. If the measured values for “a” and “b”
are outside the specified values, replace the complete dashpot.
Figure 4-11. Damping curve, Closing dashpot.
4.9.2 Opening dashpot
Check the oil level in the dashpot by recording the damping effect during operation.
•
Connect the circuit-breaker analyser’s sensor to the breaker’s shaft and record a
damping curve. Check the damping distance and the damping time as set out in
Figure 4-12
. If the recorded curve differs from the correct curve, replace the
complete dashpot.
Figure 4-12. Damping curves, Opening dashpot.
“b”
“a
”
“a” = damping distance 15-25 mm
“b” = damping time 80-300 ms
B20015
Wrong
Right
Wrong
B20016
Содержание SF6 LTB 245E1 BLG 1002A
Страница 1: ...Product Manual 1HSB435416 2 en Rev 1 LTB 245E1 BLG 1002A 3 pole operation ...
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Страница 92: ...ABB Switchgear SF6 Circuit Breaker Circuit breakers HPL and LTB 1HSB445409 1 en0 Lubricants ...
Страница 94: ...Lubricants 1HSB445409 1 en0 i LIST OF CONTENTS 1 General 1 1 1 Safety instructions 1 2 Oil 3 3 Grease 5 ...
Страница 100: ...ABB Switchgear SF6 Circuit Breaker Operating Mechanism type BLG 1002A 1HSB515409 100 en rev2 Maintenance ...
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