Siemens NXPLUS C - Page 274

Service information
274/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
Checking the interlocking conditions
➭ Put the switchgear panel into operation according to the installation and operating
instructions.
✔ The maintenance of the operating mechanism is completed.
Switch positions of the three-
position disconnector
Switch position of
the circuit-breaker
Interlocking condition
DISCONNE
CTING
function
READY-TO-EARTH
function
OPEN OPEN OPEN
• "Feeder" locking device cannot be operated.
• Cable compartment cover cannot be removed.
• "Three-position disconnector" switching operation can be selected; operating lever for
the DISCONNECTING or READY-TO-EARTH operation can be inserted; three-position
disconnector can be operated.
• Circuit-breaker can be operated.
OPEN OPEN CLOSED
• "Feeder" locking device cannot be operated.
• Cable compartment cover cannot be removed.
CLOSED --- OPEN
• Operating lever for READY-TO-EARTH operation cannot be inserted.
• Circuit-breaker can be operated.
CLOSED --- CLOSED
• "Feeder" locking device cannot be operated.
• Cable compartment cover cannot be removed.
• "Three-position disconnector" switching operation cannot be selected.
• Circuit-breaker can be operated.
--- CLOSED CLOSED
• "Three-position disconnector" switching operation cannot be selected.
• "Feeder" locking device can be operated.
• Cable compartment cover can be removed.
• Circuit-breaker can be operated.
--- CLOSED OPEN
• Operating lever for DISCONNECTING operation cannot be inserted.
• "Feeder" locking device cannot be operated.
• Cable compartment cover cannot be removed.
• Circuit-breaker can be operated.