1MRK002801-AC 14 670 1.2 PG V1 EN
Figure 30: Binary in/out module (IOM). Input contacts named XA corresponds
to rear position X31, X41, and so on, and output contacts named
XB to rear position X32, X42, and so on.
5.4.1.4 Connection examples for high impedance differential protection
WARNING! USE EXTREME CAUTION! Dangerously high
voltages might be present on this equipment, especially on the plate
with resistors. Do any maintenance ONLY if the primary object
protected with this equipment is de-energized. If required by
national law or standard, enclose the plate with resistors with a
protective cover or in a separate box.
Connections for three-phase high impedance differential protection
Generator, reactor or busbar differential protection is a typical application for three-
phase high impedance differential protection. Typical CT connections for three-
phase high impedance differential protection scheme are shown in figure 31.
Section 5 1MRK 502 029-UEN A
Installing the IED
56
Installation and commissioning manual
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