ABB Tmax T8 L5757 - Maintenance Operations and Final Inspections (Second Level); Interlocks Verification (Second Level)

L3692
Tmax T8
19/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
8.4.9. Maintenance operations; fi nal inspections
- Fit all the parts back in place and re-connect the auxiliary power supply if necessary.
- Re-assemble the escutcheon plate as shown in fi gure 30.
1,1 Nm
Fig. 29
- Using the different auxiliaries in succession, perform the operations 10 times:
- Opening (in both the local and remote modes, if applicable)
- Closing (in both the local and remote modes, if applicable)
- Release by means of the trip test via relay
- Check the operations in accordance with the following sequence:
- Open - Springs unloaded
- Open - Springs loaded
- Closed - Springs unloaded
- Closed - Springs loaded
- Make sure that the accessories (if installed) function correctly
- Make sure that the gearmotor (if installed) functions correctly
- Make sure that the undervoltage release functions correctly (if installed)
- Make sure that the shunt opening release functions correctly (if installed)
- Make sure that the shunt closing release functions correctly (if installed)
- Make sure that the circuit-breaker's auxiliary contacts function correctly (if installed)
- Make sure that the lock for circuit-breaker in open position (key or padlock) functions correctly (if installed)
8.4.10. Interlocks
Make sure that the interlocks between circuit-breakers side by side and on top of each other (if applicable) have been correctly
installed and function correctly.