ABB Sace Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User page 62
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 unit
Test with Ekip Connect Test the trip unit:
60 | © 2022 ABB | 1SDH000999R0002 - ECN000232533
To clean and lubricate:
1.
Clean in the points shown in the illustration. If there is a thick build-up of dirt, use a thinner from
the greasing kit or ask for assistance from the service staff.
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 74 - 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:
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 a Ekip Dip verify the absence of alarms through frontal LEDs.
4.
With a Ekip Touch, 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 a Ekip Touch check the percentage of wear on the contacts of the circuit-breaker.
7.
Finally, remove the Ekip TT battery unit.
1.
Connect the Ekip Bluetooth or Ekip T & P unit to the trip unit.
2.
Connect the computer where the program is installed by means of a Bluetooth or USB connection.
3.
After connecting the computer and trip unit, check that there are no alarm signals. Otherwise, refer
to the paragraph " 2 - Identification of alarms or failures" on page 52.
4.
In the absence of alarms you can proceed to the trip test and self test (depending on the type
of trip unit). For future checks it is recommended to insert the current date in the area called
"Information". These data will be stored within the trip unit itself.
5.
Remove the Ekip Bluetooth or Ekip T & P unit from the trip unit.
Putting into service and maintenance | 4 - Maintenance operations
ABB | SACE Emax 2
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