Connecting The Binary Input And Output Signals - Hitachi 670 Series Installation Manual

Section 6
Connecting
Table 9:
Connector type
Screw compression type
Terminal blocks suitable for ring lug terminals
6.1.5

Connecting the binary input and output signals

Auxiliary power and signals are connected using voltage connectors. Signal wires are connected to a
female connector (see Figure 29) which is then plugged into the corresponding male connector (see
Figure 30) located at the rear of the IED. For location of BIM, BOM, SOM and IOM refer to section
side connectors". Connection diagrams for BIM, BOM, SOM and IOM are shown in Figure 17, Figure 21,
Figure 22
If the IED is equipped with a test-switch of type RTXP 24, COMBIFLEX wires with 20 A sockets, 1.5mm²
(AWG16) conductor area must be used to connect the auxiliary power.
Procedure
1. Connect signals to the female connector
The conductors can be of rigid type (solid, stranded) or of flexible type.
The female connectors accept conductors with a cross section area of 0.2-2.5 mm
two conductors are used in the same terminal, the maximum permissible cross section area is 0.2-1
mm
If two conductors, each with area 1.5 mm
ferrule must be used, see figure 31. Crimp this ferrule properly to the wire using tools as
recommended by the supplier of the ferrules (keep stripping length of the cable to minimum 10
mm). The fastening screw shall be tightened with a torque of 0.4 Nm (This torque applies to all
binary connectors).
2. Plug the female connector to the corresponding back-side mounted male connector
3. Lock the female connector by fastening the lock screws
50
CT and VT circuit connectors
and Figure 23.
Do not insert anything else to the female connector but the corresponding male 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.
2
(AWG 24-18).
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Rated voltage and current
250 V AC, 20 A
250 V AC, 20 A
2
(AWG 16) need to be connected to the same terminal, a
1MRK514026-UUS Rev. P
SEMOD53376-2 v6
Maximum conductor area
2
4 mm (AWG12)
2
2 x 2.5 mm (2 x AWG14)
2
4 mm (AWG12)
M11992-9 v8
"Rear
2
(AWG 24-14). If
670 series
Installation manual