B2342
Emax VF
25/66
Doc. No
Model
Apparatus
Scale
Page No
1SDH000909R0001
-
Check that the mechanical operation counter is operating correctly (if applicable) by running an operation on the circuit-breaker.
SACE
PR12
2/VF
SACE
PR12
2/VF
Fig. 44
8.4.7. Checking contact wear
With the circuit-breaker open and arcing chambers removed:
1) Check the state of the blowout magnet chambers: the body of the chamber must be undamaged and the plates must not be cor-
roded or damaged.
2) Remove the dust with compressed air and remove traces of smoke and any waste with a brush of appropriate type.
3) Check the state of the contacts.
4) Visually check that the main plates and the blowout magnets are in place.
5) Check for oxidation or beads and if they are detected, request help from the qualified ABB technician (*).
6.1) Check the blowout magnets distances (distance A fig 45).
Fig. 45
Circuit Breaker
6.2) close the circuit-breaker and check the gap A
- If the gap A is not correct, contact ABB Sace (*)
- If the gap A is correct, open the circuit breaker and refit the arc chambers.
(*) Subject to the customer’s approval, ABB can replace “A” type parts.
8.4.8. Protection releases
- Supply the protection release with a PR030/B battery unit.
- Check operation of the protection release: release test with “Trip Test” and “Autotest”.
- Use release PR122/VF to check for the absence of alarms on the display and via front LEDs.
- Check correct wiring of the cables to the modules of the release and to the release (if applicable).
- On PR122/VF check the percentage of wear to the contacts of the circuit-breaker.
- At the end, remove the battery unit PR030/B from the relay.
8.4.9. Test with Ekip Connect (optional)
- Connect Ekip T&P unit on a PC and the cable adapter to the relay to be tested.
- Run the Ekip Connect software on the PC .
