Hitachi Relion 670 Series Applications Manual page 250
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Section 12
Control
12.4.3.4
Signals from bus-coupler
If the busbar is divided by bus-section disconnectors into bus-sections, the signals BC_12 from the
busbar coupler of the other busbar section must be transmitted to the own busbar coupler if both
disconnectors are closed.
(WA1)A1
(WA2)B1
(WA7)C
IEC04000484 V1 EN-US
Figure 100:
To derive the signals:
Signal
BC_12_CL
VP_BC_12
EXDU_BC
These signals from each bus-coupler bay (ABC_BC), except the own bay, are needed:
Signal
BC12CLTR
VPBC12TR
EXDU_BC
These signals from each bus-section disconnector bay (A1A2_DC) are also needed. For B1B2_DC,
corresponding signals from busbar B are used. The same type of module (A1A2_DC) is used for
different busbars, that is, for both bus-section disconnector A1A2_DC and B1B2_DC.
Signal
DCCLTR
VPDCTR
EXDU_DC
If the busbar is divided by bus-section circuit breakers, the signals from the bus-section coupler bay
(A1A2_BS), rather than the bus-section disconnector bay (A1A2_DC), must be used. For B1B2_BS,
corresponding signals from busbar B are used. The same type of module (A1A2_BS) is used for
different busbars, that is, for both bus-section circuit breakers A1A2_BS and B1B2_BS.
Signal
S1S2CLTR
VPS1S2TR
EXDU_BS
For a bus-coupler bay in section 1, these conditions are valid:
244
Section 1
A1A2_DC(BS)
B1B2_DC(BS)
ABC_BC
Busbars divided by bus-section disconnectors (circuit breakers)
Another bus-coupler connection exists between busbar WA1 and WA2.
The switch status of BC_12 is valid.
No transmission error from any bus-coupler bay (BC).
A bus-coupler connection through the own bus-coupler exists between busbar WA1
and WA2.
The switch status of BC_12 is valid.
No transmission error from the bay that contains the above information.
The bus-section disconnector is closed.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
A bus-section coupler connection exists between bus sections 1 and 2.
The switch status of bus-section coupler BS is valid.
No transmission error from the bay containing the above information.
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Section 2
A2
B2
C
ABC_BC
en04000484.vsd
1MRK506375-UEN Rev. N
M13553-58 v5
Railway application RER670
Application manual
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