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Installation and Commissioning
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8-46
G
At the terminals of the device, check continuity for each pair of terminals that re-
ceives current from the CTs.
G
Firmly re-insert the C–I/O–2 board. Carefully connect the ribbon cable. Do not bend
any connector pins! Do not use force!
G
Check continuity for each of the current terminal-pairs again.
G
Attach the front panel and tighten the screws.
Connect an ammeter in the supply circuit of the power supply. A range of about 2.5 A
to 5 A for the meter is appropriate.
Close the protective switches to apply voltage to the power supply. Check the polarity
and magnitude of the voltage at the device terminals.
The measured steady-state current should correspond to the quiescent power con-
sumption of the device. Transient movement of the ammeter merely indicates the
charging current of capacitors.
Remove the voltage from the power supply by opening the protective switches.
Disconnect the measuring equipment; restore the normal power supply connections.
Apply voltage to the power supply.
Close the protective switches for the voltage transformers.
Verify that the voltage phase rotation at the device terminals is correct. Note that the
device can be set for L1-L2-L3 rotation or L1-L3-L2 rotation under address 0235
PHASE SEQ. in P.System Data1 . See also Sub-section 6.1.1.
Open the protective switches for the voltage transformers and the power supply.
Check the trip circuits to the power system circuit breakers.
Check the close circuits to the power system circuit breakers.
Verify that the control wiring to and from other devices is correct.
Check the signalling connections.
Check the analog outputs (if available and used).
Close the protective switches to apply voltage to the power supply.
7SA6 Manual
C53000-G1176-C156-2
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