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.
4.10 Checking the binary input/output circuits
M11722-2 v4
Do not insert anything else to the female connector but the corresponding male
connector. Inserting anything else (such as a measurement probe) may damage the
female connector and prevent a proper electrical contact between the printed circuit
board and the external wiring connected to the screw terminal block.
4.10.1 Binary input circuits
M11722-4 v3
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.
4.10.2 Binary output circuits
M11722-8 v3
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.
4.11 Checking optical connections
M16022-2 v8
Check that the Tx and Rx optical connections are correct.
An IED equipped with optical connections has an minimum space requirement of 180
mm (7.2 inches) for plastic fiber cables and 275 mm (10.9 inches) for glass fiber cables.
Check the allowed minimum bending radius from the optical cable manufacturer.
Section 4 1MRK 504 165-UUS Rev. J
Starting up
54 Transformer protection RET670
Commissioning manual
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