Hitachi Relion 670 Series Applications Manual page 264

Section 12
Control
Signal
QB1OPTR
QB2OPTR
QB220OTR
QB7OPTR
VPQB1TR
VPQB2TR
VQB220TR
VPQB7TR
EXDU_BB
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 disconnectors A1A2_DC and B1B2_DC.
Signal
DCOPTR
VPDCTR
EXDU_DC
If no bus-section disconnector exists, the signal DCOPTR, VPDCTR and EXDU_DC are set to 1
(TRUE).
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
QB1OPTR
QB2OPTR
VPQB1TR
VPQB2TR
EXDU_BS
For a busbar earthing switch, these conditions from the A1 busbar section are valid:
258
QB1 is open.
QB2 is open (AB_TRAFO, ABC_LINE)
QB2 and QB20 are open (ABC_BC)
QB7 is open.
The switch status of QB1 is valid.
The switch status of QB2 is valid.
The switch status of QB2and QB20 is valid.
The switch status of QB7 is valid.
No transmission error from the bay that contains the above information.
The bus-section disconnector is open.
The switch status of bus-section disconnector DC is valid.
No transmission error from the bay that contains the above information.
QB1 is open.
QB2 is open.
The switch status of QB1 is valid.
The switch status of QB2 is valid.
No transmission error from the bay BS (bus-section coupler bay) that contains the
above information.
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1MRK506375-UEN Rev. N
Railway application RER670
Application manual