Service information
280/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
Fuse tripping
Check functionality and smooth operation of the fuse tripping:
➭ Check firm seating of all terminal connections ① .
➭ Check smooth operation of tripping rocker, lubricate if necessary.
➭ Check whether the auxiliary switch ① (option) reacts when the tripping rocker is lifted
(clicking noise).
➭ Switch the spring-operated/stored-energy mechanism to CLOSED position.
➭ Pull the tripping rocker ② up manually.
✔ The spring-operated/stored-energy mechanism trips.
DANGER
Hazardous voltage.
Will cause death, serious injury and property damage.
Always observe the Five Safety Rules:
➭ Isolate.
➭ Secure against reclosing.
➭ Verify safe isolation from supply.
➭ Earth and short-circuit.
➭ Cover or barrier adjacent live parts.
DANGER
Life-endangering voltage
Can cause death, injury or property damage. If the operating mechanism cover is
removed, do not touch any live parts.
➭ Switch off auxiliary voltage.
WARNING
High speed moving parts
Can cause serious injury.
Do not remove the front cover of the operating mechanism until the following actions have
been performed:
➭ To avoid impermissible switching operations, switch off auxiliary voltage, e.g.:
- Switch the auxiliary voltage supply of the motor.
- Trip the MCB.
- Disconnect the control cables from the low-voltage compartment.
➭ To discharge the spring energy store in the operating mechanism, execute the following
instructions:
- Actuate the manual OFF pushbutton.
- Actuate the manual ON pushbutton.
- Actuate the manual OFF pushbutton again.
➭ Check if the "spring charged" indicator shows "spring charged".
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