Rockwell Automation 140G-N_NS Servicing Instructions - Manual (Page 3)

Check the efficient operation of any accessories.
Check the efficient operation of the geared motor, if any
Check the proper operation of the undervoltage release, if any.
Check the efficient operation of the shunt opening release, if any.
Check the efficient operation of the shunt closing release, if any.
Check the efficient operation of the circuit breaker's auxiliary contacts, if any.
Safety release
Check the efficient operation of the safety release: test the release using the Trip Test and the Autotest, where applicable.
reinstall all parts and, if necessary, reconnect the auxiliary power supply
140G-NS: using the various auxiliaries in succession, perform 10 each of the following operations:
- opening (both locally and remotely, where applicable)
- closing (both locally and remotely, where applicable)
- releasing by means of a trip test from the relay
140G-N : using the various auxiliaries in succession, perform 10 each of the following operations:
- opening
- closing
- releasing with the trip test
- resetting
For , check the procedures in the following sequence: 140G-NS
- open - springs unloaded
- open - springs loaded
- closed - springs unloaded
- closed - springs loaded
Check the efficient operation of the devices for locking the circuit breaker in its inserted or withdrawn positions, if any.
Servicing procedures; final checks:
140G-N mechanical control
Lubricate the shafts and the
opening latches with grease type
MOBILGREASE 28 (EXXON
MOBIL) (Fig. 3);
Fig. 3
(3)
DIR 1000707R0001 (L6579)
Interlocks
Check the proper installation and efficient operation of the interlocking devices between circuit breakers placed side by side
or one above the other (if any). Their efficiency cannot be tested while the breakers are in the Test or Withdrawn positions.