ABB Relion 630 Series, Technical Manual

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This module processes the network circuit breaker power received from the Power
monitoring module based on the load-shedding blocking signals, as shown in
Table
293 and the Block override setting. This processed network circuit breaker power is
provided by the
CB_POWER
output for the monitoring view.
Table 293: Calculation of the CB_POWER output
Load-shedding blocking signals Block override setting CB_POWER output
Active due to IED data quality Quality bad CB close
Quality bad CB open
0
Active due to IED data quality or IED
test mode or circuit breaker position
All yes 0
For all other conditions of the load-shedding blocking and the Block
override setting, the
CB_POWER
output remains same as the
calculated value from the Power monitoring module.
The module reports the load-shedding blocking signals to the Compensated circuit
breaker status module, FLS trigger logic module, General logic module and Binary to
integer module.
7.6.4.3 Compensated circuit breaker status
This module calculates the compensated circuit breaker status for the various CB
configuration settings.
The inputs to calculate the compensated circuit breaker status when the CB
configuration setting is “Bus coupler”.
• Sending-end circuit breaker position.
• Sending-end IED data quality.
• Sending-end lockout operating status.
• Sending-end circuit breaker service status.
The inputs to calculate the compensated circuit breaker status when the CB
configuration setting is “Tie breaker”.
• Sending-end and receiving-end circuit breaker positions.
• Sending-end and receiving-end IED data qualities.
• Sending-end and receiving-end lockout operating status.
• Sending-end and receiving-end circuit breaker service status.
Figure 143 shows the logic for the calculation of compensated circuit breaker status
for network circuit breaker.
Section 7
1MRS757256 F
Power management functions
254 PML630/Compact Load-Shedding Solution
Technical Manual