Applying Operating Voltage - Siemens 8DJH Installation And Operating Instructions Manual

Energizing incoming
feeders
Verifying correct
terminal-phase
connections
Preconditions
Performing the test
Checking further phases
Applying voltage to the
busbar
Energizing consumer
feeders
500-8067.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • Revision 05
15.5

Applying operating voltage

DANGER
Hazardous voltage and internal arcing. Can cause death, serious injury or property damage. Do
not apply operating voltage before the following instructions have been executed:
➭ Observe the specifications for prevention of accidents.
➭ Observe the operating instructions and work instructions of the switchgear operator.
➭ Install the switchgear according to the installation instructions and drawings supplied.
➭ Perform electrical and mechanical function test successfully.
➭ Instruct the operating personnel in theory and practice of switchgear operation.
➭ Fit all covers and bolt them tight.
➭ Switch all circuit-breakers to OPEN position.
➭ Switch the three-position disconnectors or three-position switch-disconnectors in all
panels to OPEN position.
➭ Earth feeders without connected cables. Close all bushings in a surge-proof way.
➭ Switch off the consumers connected to all outgoing feeders.
➭ Short-circuit unused current transformers on the secondary side.
➭ Operate unused voltage transformers open on the secondary side.
➭ Check the phase sequence in all incoming and outgoing feeders to assure a consistent
phase sequence in the entire switchgear assembly before connecting them to the busbar.
➭ Energize all incoming feeders in the respective opposite substation.
Verify correct terminal-phase connections of all incoming feeders:
• Use phase comparison test unit according to IEC 61243-5 or VDE 0682-415.
• The panel of the incoming feeder to be tested must be in OPEN position.
• The opposite substation must be de-earthed and live.
➭ Remove the covers of the capacitive test sockets from phase L1 on the incoming feeder to
be tested and on an already energized incoming feeder.
✔ The plug-in sockets of the capacitive voltage detecting system on phase L1 are accessible.
➭ Plug the measuring cables of the phase comparison test unit into the plug-in sockets of the
capacitive voltage detecting system according to the operating instructions.
➭ 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.
➭ 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.
If the phase sequence of all incoming feeders is correct, the incoming feeders can be
connected to the busbar:
➭ Switch the three-position switch-disconnector, three-position disconnector and circuit-
breaker to CLOSED position (see page 83, "Operation" and following chapters).
✔ The busbar of the switchgear is live.
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.
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