Verify that the contact sockets have been crimped correctly and that they
are fully inserted by tugging on the wires. Never do this with current
circuits in service.
Current circuit
1. Verify that the contacts are of current circuit type.
2. Verify that the short circuit jumpers are located in the correct slots.
Voltage circuit
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 (7.2 inches) for plastic fiber cables and 275 mm (10.9 inches) for
Section 3
1MRK 505 293-UUS A
Starting up
32
Commissioning manual
