ABB SCK - Checking Residual Current Circuit Breakers

42/23-81 EN Rev. 4 System Manual SCK Gas Sampling System 167
Checking protective installations
 at least once a year
EMERGENCY STOP switch: The EMERGENCY STOP switch -J75 should be
checked after shutting down the kiln if possible, as the test procedure disables all
monitoring mechanisms. If it is necessary to check during operation, the retracting
probe retractor must be max. one meter from the rear end position when you actu-
ate the EMERGENCY STOP switch -J75 in order to prevent uncontrolled heat-up
of the probe tip if an error occurs at the same time.
Observe company regulations with regard to maintenance intervals.
Always take the following safety measures when performing this work:
 Wear the general protective equipment.
 Press the EMERGENCY STOP switch immediately if anyone is still in the dan-
ger area around the retractor after the warning lamps light up or the warning
buzzer buzzes.
Explanation of safety measures: Safety regulations for maintenance work on page
156.
The following conditions must be met:
 System is in operation.
 Gas sampling probe is inserted into the kiln.
 Service switch is in the OFF position.
Maintenance interval
Safety
measures
Requirements