ABB Relion 670 series, Installation And Commissioning Manual

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Pin Name 2-wire Name 4-wire Description
2–wire: Connect pin X1:1 to
pin X1:6 and pin X1:2
to pin X1:5.
Termination (2-wire): Connect pin X1:1 to
pin X1:3
Termination (4-wire): Connect pin X1:1 to
pin X1:3 and pin X1:4
to pin X1:6
The distance between earth points should be < 1200 m (3000 ft), see figure 52 and
53 . Only the outer shielding is connected to the protective earth at the IED. The
inner and outer shieldings are connected to the protective earth at the external
equipment. Use insulating tape for the inner shield to prevent contact with the
protective earth. Make sure that the terminals are properly earthed with as short
connections as possible from the earth screw, for example to an earthed frame.
The IED and the external equipment should preferably be connected to the same
battery.
Section 5
1MRK 502 029-UEN A
Installing the IED
78
Installation and commissioning manual