guidelines for this type of equipment. The auxiliary power wiring should have a
minimum cross-sectional area of 1.0 mm
2
and a voltage rating of 250 V. Branch
circuit protection must be provided in the auxiliary power supply wiring to the IED
and, if necessary, it must be possible to disconnect it manually from the power
supply. Fuse or circuit breaker up to 6 A and 250 V should be close to the
equipment. It is recommended to separate the instrument transformer leads from
the other cables, that is, they should not be run in the same cable ducts or loom.
Connection examples
The figures below show typical installations for rotor and stator earth fault
protection with injection unit REX060 and coupling capacitor unit REX061. Some
installations with and without shunt resistor unit REX062 are also shown.
IEC11000224 V3 EN-US
Figure 39: Rotor connection example
Section 6 1MRK 514 026-UEN B
Connecting
64 670 series 2.2 IEC
Installation manual
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