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Interlocking
•
Q75_OP = 1
•
Q75_CL = 0
•
BC_AB_CL = 0
If there is no second busbar B and therefore no Q20 and Q2 disconnectors, then the in-
terlocking for Q20 and Q2 are not used. The states for Q20, Q2, Q25, BC_AB, BBTR
are set to open by setting the appropriate module inputs as follows. In the functional
block diagram, 0 and 1 are designated 0=FIXD-OFF and 1=FIXD-ON:
•
Q20_OP = 1
•
Q20_CL = 0
•
Q2_OP = 1
•
Q2_CL = 0
•
Q25_OP = 1
•
Q25_CL = 0
•
BC_AB_CL = 0
•
BBTR_OP = 1
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The interlocking module AB_TRAFO is used for a transformer bay connected to a dou-
ble busbar arrangement according to figure 131. The module is used when there is no
disconnector between circuit breaker and transformer. Otherwise, the module
ABC_LINE can be used. This module can also be used for a single busbar arrangement.
&KDSWHU
&RQWURO
255
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