802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11 185/293
Installation
➭ Perform phase comparison according to the operating instructions of the phase comparison
test unit and read the indication.
➭ Remove the measuring cables from the plug-in sockets.
➭ Refit the covers of the capacitive test sockets on both incoming feeders.
Checking further phases ➭ Perform phase comparison for the phases L2 and L3 in the same way.
✔ If the phase comparison test unit has shown coincidence on all 3 phases, the phase
sequence of the tested incoming feeder is correct.
✔ The incoming feeder can be energized.
Applying voltage to the
busbar
If the phase sequence of all incoming feeders is correct, the incoming feeders can be
connected to the busbar:
➭ Close the three-position disconnector (the three-position disconnector must be operated in
no-load condition, see page 186, "Operation").
➭ Close the circuit-breaker or superior circuit-breaker.
✔ The busbar of the switchgear is live.
Energizing consumer
feeders
When all incoming feeders are connected to the busbar:
➭ One after the other, energize all consumer feeders with connected consumers.
✔ When all consumer feeders are energized, the switchgear is completely in operation.
Documenting the
commissioning
➭ Document the modifications occurred during installation or commissioning.
➭ Document the modifications in the circuit diagram.
➭ Send the modifications to the regional Siemens representative.
After commissioning ➭ Observe the Five Safety Rules for working in the switchgear:
- Isolate.
- Secure against reclosing.
- Verify safe isolation from supply.
- Earth and short-circuit.
- Cover or barrier adjacent live parts.
➭ Observe the locally applicable specifications for prevention of accidents.
➭ If after commissioning further work is required in the area of the switchgear, install warning
signs on the switchgear.
Access for working in the area of the switchgear must only be granted to the following
persons:
- Electricians and persons who have been properly instructed in electrical engineering
- Persons under the supervision of electricians and persons who have been properly
instructed in electrical engineering
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