ABB Relion 670 series, Installation And Commissioning Manual

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6.4 Checking the power supply
Check that the auxiliary supply voltage remains within the permissible input
voltage range under all operating conditions. Check that the polarity is correct
before powering the IED.
6.5 Checking the binary I/O circuits
6.5.1 Binary input circuits
Preferably, disconnect the binary input connector from the binary input cards.
Check all connected signals so that both input level and polarity are in accordance
with the IED specifications.
6.5.2 Binary output circuits
Preferably, disconnect the binary output connector from the binary output cards.
Check all connected signals so that both load and polarity are in accordance with
IED specifications.
6.6 Checking optical connections
Check that the Tx and Rx optical connections are correct.
An IED equipped with optical connections requires a minimum
depth of 180 mm for plastic fiber cables and 275 mm for glass fiber
cables. Check the allowed minimum bending radius from the
optical cable manufacturer.
1MRK 502 029-UEN A
Section 6
Checking the external optical and electrical connections
89
Installation and commissioning manual