Sel 411L - Figure 9.1 Intelligent Circuit Breaker Monitor; Table 9.1 Circuit Breaker Monitor Configuration

P.9.2
SEL-411L Relay Protection Manual Date Code 20151029
Monitoring and Metering
Circuit Breaker Monitor
You can also collect the following data on these circuit breaker parameters:
➤ Electrical operating time
➤ Mechanical operating time
➤ Circuit breaker inactivity time
➤ Interrupted current
➤ Pole scatter
➤ Pole discrepancy
➤ Motor run time
Figure 9.1 Intelligent Circuit Breaker Monitor
You can program the relay to alarm when any of the above quantities exceed a
preset threshold. In addition, the relay stores a 128-event circuit breaker
history in nonvolatile memory. The circuit breaker history report includes
circuit breaker mechanical operation times, electrical operation times,
interrupted currents, and other important parameters. The alarm and reporting
features help you operate your substation safely and reliably.
Enabling the Circuit
Breaker Monitor
Enable and configure the relay circuit breaker monitor by using the settings
listed in Table 9.1 for each of two possible circuit breakers. Power system
circuit breakers are either single-pole tripping or three-pole tripping circuit
breakers; set the relay for the circuit breaker type that the relay controls. For a
single pole tripping circuit breaker, set BK1TYP := 1, and for a three-pole
tripping circuit breaker, set BK1TYP := 3. The factory default setting is
BK1TYP := 1. Be sure to configure the relay with the settings that match your
circuit breakers.
Relay
Circuit
Breaker
Monitor
Aux. Contact Inputs
Phase Currents
Excess Breaker
Contact Wear
Excess Mechanical
Operating Time
Excess Electrical
Operating Time
Excess Pole Scatter
or Pole Discrepancy
Excess Breaker
Inactivity Time
Excess Motor
Running Time
Excess kA
Interrupted
Deviations in Station
Battery Voltages
Station Battery Voltages
Table 9.1 Circuit Breaker Monitor Configuration
Name Description Range Default
EB1MON Enable Circuit Breaker 1 monitoring Y, N N
BK1TYP Circuit Breaker 1 type 1, 3 3
EB2MON Enable Circuit Breaker 2 monitoring Y, N N
BK2TYP Circuit Breaker 2 type 1, 3 3