ABB RET670 - Interlocking for Breaker-And-A-Half Diameter BH (3)

• 989_OP = VOLT_OFF
• 989_CL = VOLT_ON
If there is no voltage supervision, then set the corresponding inputs as follows:
• VOLT_OFF = 1
• VOLT_ON = 0
3.12.3.9 Interlocking for breaker-and-a-half diameter BH (3)
Application
The interlocking for breaker-and-a-half diameter (BH_CONN(3), BH_LINE_A(3),
BH_LINE_B(3)) functions are used for lines connected to a breaker-and-a-half
diameter according to figure 275.
WA1 (A)
WA2 (B)
189
189G
289G
989G
689
989
289
189G
289G
389G
689
389G
6289
6189
189G
289G
989G
989
BH_LINE_A
BH_LINE_B
BH_CONN
en04000513_ansi.vsd
152
152
152
ANSI04000513 V1 EN
Figure 275: Switchyard layout breaker-and-a-half
Three types of interlocking modules per diameter are defined. BH_LINE_A (3) and
BH_LINE_B (3) are the connections from a line to a busbar. BH_CONN (3) is the
Section 3 1MRK504116-UUS C
IED application
650
Application manual