IEC15000447-2-en.vsd
1
IEC15000447 V2 EN-US
Figure 20: Rear view of IED showing the earthing point
Pos
Description
1
Protective conductor terminal. For connection of the external protective
(earth) conductor.
Use the protective conductor terminal (1) for connection to the stations
earthing system.
6.1.3
Connecting the power supply module
SEMOD128790-5 v7
The wiring from the cubicle terminal block to the IED terminals (see Figure
connection diagram) must be made in accordance with the established guidelines for this type
of equipment.
Insert only the corresponding male connector to the female connector.
Inserting anything else (such as a measurement probe) may violate the female
connector and prevent a proper electrical contact between the printed circuit
board and the external wiring connected to the screw terminal block.
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 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. The connections are made on
connector X11.
6.1.4
Connecting to CT and VT circuits
M11991-6 v3
CTs and VTs are connected to the 24–pole connector of the Transformer input module (TRM)
on the rear side of the IED. Connection diagram for TRM is shown in figure
Section 6
1MRK 514 027-UEN D
Connecting
36
650 series
Installation manual
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