Mounting and Commissioning
3.2 Checking Connections
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
289
• 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.
• Switch on m.c.b. for auxiliary voltage (supply protection), check the voltage level and, if applicable, the po-
larity of the voltage at the device terminals or at the connection modules.
• The current consumption should correspond to the power input in neutral position of the device. The mea-
sured steady state current should be insignificant. Transient movement of the ammeter merely indicates the
charging current of capacitors.
• Remove the voltage from the power supply by opening the supply circuit of the power supply.
• Disconnect the measuring test equipment; restore the normal power supply connections.
• Check the trip and close circuits to the power system circuit breakers.
• Verify that the control wiring to and from other devices is correct.
• Check the signalling connections.
• Remove the voltage from the power supply by closing the supply circuit of the power supply.
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