1. Verify that the contacts are of voltage circuit type.
2. Check that no short circuit jumpers are located in the slots dedicated for voltage.
Trip and alarm circuits
1. Check that the correct types of contacts are used.
3.10
Checking binary input and output circuits
3.10.1
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.
3.10.2
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.
3.11
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 502 049-UEN A
Section 3
Starting up
31
Commissioning manual
