Cleaning And Lubrication Of The Operating Mechanism; Inspection Of Electrical And Mechanical Accessories; Inspection Of The Protection Trip Unit - ABB SACE Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User
Low voltage air circuit-breakers
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Cleaning and lubrication of the
operating mechanism
Inspection of electrical and
mechanical accessories
Inspection of the protection trip
103 | © 2017 ABB | 1SDH000999R0002 - ECN000058721 - Rev. B
To clean and lubricate:
1.
Clean the points indicated in the illustration. Use a laminate thinner such as Henkel 273471 or Chemma
18 or equivalent if there is a heavy coating of dirt.
2.
Lubricate the opening and closing latches and the shafts in the indicated points using Mobilgrease 28
(EXXON MOBIL).
3.
Make sure that the opening and closing shafts are free to turn.
Figure 78 - Lubrication of the shafts and closing and opening latches
Check the accessories:
1.
Check that the accessories are securely fixed to the circuit-breaker.
2.
Check that the accessories are connected correctly to the circuit-breaker.
3.
Make sure that the coils (YU-YO-YC), if present, are in good condition (no excessive wear and tear,
overheating, rupture).
4.
Make sure that the mechanical operation counter functions correctly (if present) by operating the
circuit-breaker.
5.
Check the wear on the brushes of the gearmotor and if necessary replace them.
NOTE: it is advisable to replace the gear motor if it has performed more than 10000 spring
charging operations or reached 50% of the declared mechanical life of the circuit-breaker.
Check that the trip unit is in good condition:
unit
1.
Power the protection trip unit with an Ekip TT battery unit.
2.
Check the correct operation of the protection trip unit: tripping test with "Trip Test" and "Autotest".
3.
With an Ekip Dip trip unit verify the absence of alarms through frontal LEDs.
4.
With an Ekip Touch trip unit, verify the absence of alarms via the display and the front LEDs.
5.
Make sure that the cables are correctly connected to the modules and to the trip unit (if applicable).
6.
On an Ekip Touch trip unit check the percentage of wear on the contacts of the circuit-breaker.
7.
Finally, remove the Ekip TT battery unit.
Putting into service and maintenance | 4 - Maintenance operations
ABB | SACE Emax 2
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