Interlocking For Breaker-And-A-Half Diameter Bh (3) - ABB RELION RET670 Applications Manual

Section 15
Control
15.3.9
15.3.9.1
752
• 989_OP = 1
• 989_CL = 0
• 989G_OP = 1
• 989G_CL = 0
If, in this case, line voltage supervision is added, then rather than setting 989 to open
state, specify the state of the voltage supervision:
• 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

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 361.
1MRK 504 163-UUS A
Transformer protection RET670 2.2 ANSI
Application manual
IP14173-1 v3
M13570-3 v6