Siemens NXPLUS C User Manual

802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11 179/293
Installation
Checking protection
devices
➭ Check the version of the firmware installed on the protection devices, and update if
required, see page 8, "IT security".
18.2 Checking the accessories
➭ Place the following accessories ready to hand:
• Installation and operating instructions
• Operating levers for the three-position disconnector:
- Operating lever with black ball handles for DISCONNECTING function
- Operating lever with red ball handles for EARTHING/READY-TO-EARTH function
• Hand crank for charging the circuit-breaker closing spring (with freewheel)
• Adapter for emergency operation (only for panels with a width of 900 mm and panels with
motor operating mechanism)
• Double-bit key with a diameter of 3 mm for the door of the low-voltage compartment
• Double-bit key with a diameter of 5 mm for the voltage transformer disconnector and the
door of the low-voltage compartment
• Circuit diagrams
• Torx screwdriver T25
18.3 Instructing operating personnel
➭ Instruct operating personnel in theory and practice of switchgear operation.
18.4 Function test / Test operation
WARNING
Hazardous voltage
Can cause death or injury.
➭ Perform mechanical function test with primary part de-energized and without auxiliary
voltage. Do not perform mechanical function test while energized.
➭ Do not energize switchgear until mechanical function test has been successfully
completed.
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".

Siemens NXPLUS C Specifications

General

Brand	Siemens
Model	NXPLUS C
Category	Circuit breakers
Language	English