Signal
S1DC_OP All disconnectors on bus-section 1 are open.
S2DC_OP All disconnectors on bus-section 2 are open.
VPS1_DC The switch status of disconnectors on bus-section 1 is valid.
VPS2_DC The switch status of disconnectors on bus-section 2 is valid.
EXDU_BB No transmission error from any bay that contains the above information.
These signals from each line bay (ABC_LINE), each transformer bay
(AB_TRAFO), and each bus-coupler bay (ABC_BC) are needed:
Signal
QB1OPTR QB1 is open.
QB2OPTR QB2 is open (AB_TRAFO, ABC_LINE).
QB220OTR QB2 and QB20 are open (ABC_BC).
VPQB1TR The switch status of QB1 is valid.
VPQB2TR The switch status of QB2 is valid.
VQB220TR The switch status of QB2 and QB20 are valid.
EXDU_BB No transmission error from the bay that contains the above information.
If there is an additional bus-section disconnector, the signal from the bus-section
disconnector bay (A1A2_DC) must be used:
Signal
DCOPTR The bus-section disconnector is open.
VPDCTR The switch status of bus-section disconnector DC is valid.
EXDU_DC No transmission error from the bay that contains the above information.
If there is an additional bus-section circuit breaker rather than an additional bus-
section disconnector the signals from the bus-section, circuit-breaker bay
(A1A2_BS) rather than the bus-section disconnector bay (A1A2_DC) must be
used:
Signal
QB1OPTR QB1 is open.
QB2OPTR QB2 is open.
VPQB1TR The switch status of QB1 is valid.
VPQB2TR The switch status of QB2 is valid.
EXDU_BS No transmission error from the bay BS (bus-section coupler bay) that contains the
above information.
For a bus-section disconnector, these conditions from the A1 busbar section are
valid:
Section 15 1MRK 506 369-UEN B
Control
676 Line distance protection REL670 2.2 IEC
Application manual
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