Schweitzer Engineering SEL-351P - Page 370

ii Breaker/Recloser Monitor, Battery System Monitor, Date Code 990430
Metering, and Load Profile Functions
SEL-351P Manual Técnico
Residual Ground Demand Current Below Pickup GDEMP ...............................8-28
Residual Ground Demand Current Goes Above Pickup GDEMP......................
8-28
Residual Ground Demand Current Goes Below Pickup GDEMP Again ...........
8-28
View or Reset Demand Metering Information............................................................
8-29
Via Serial Port.....................................................................................................
8-29
Via Front Panel ...................................................................................................
8-29
Demand Metering Updating and Storage............................................................................
8-29
Energy Metering .................................................................................................................
8-29
View or Reset Energy Metering Information..............................................................
8-29
Via Serial Port.....................................................................................................
8-29
Via Front Panel ...................................................................................................
8-30
Energy Metering Updating and Storage......................................................................
8-30
Maximum/Minimum Metering ...........................................................................................
8-30
View or Reset Maximum/Minimum Metering Information .......................................
8-30
Via Serial Port.....................................................................................................
8-30
Via Front Panel ...................................................................................................
8-30
Maximum/Minimum Metering Updating and Storage................................................
8-31
Load Profile Report (Only Available in Firmware Versions 1 and Greater) .............................
8-32
Determining the Size of the Load Profile Buffer................................................................
8-34
Clearing the Load Profile Buffer ........................................................................................
8-34
TABLES
Table 8.1: Access Level 2 Global Settings for Contact Wear Monitor....................................................8-2
Table 8.2: Access Level E (EZ) Global Settings for Contact Wear Monitor...........................................
8-2
Table 8.3: Parameters Used to Automatically Set Contact Wear Monitor...............................................
8-3
Table 8.4: Breaker Maintenance Information for a 25 kV Circuit Breaker..............................................
8-4
Table 8.5: Demand Meter Settings and Settings Range .........................................................................
8-25
FIGURES
Figure 8.1: Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker..........................................8-5
Figure 8.2: SEL-351P Recloser Control Breaker Maintenance Curve for a 25 kV Circuit Breaker.........
8-7
Figure 8.3: Operation of SEL
OGIC Control Equation Breaker Monitor Initiation Setting........................8-8
Figure 8.4: Breaker Monitor Accumulates 10% Wear ...........................................................................
8-10
Figure 8.5: Breaker Monitor Accumulates 25% Wear ...........................................................................
8-10
Figure 8.6: Breaker Monitor Accumulates 50% Wear ...........................................................................
8-10
Figure 8.7: Breaker Monitor Accumulates 100% Wear .........................................................................
8-10
Figure 8.8: Input IN102 Connected to Trip Bus for Breaker Monitor Initiation.....................................
8-14
Figure 8.9: Response of Thermal and Rolling Demand Meters to a Step Input (setting
DMTC = 15 minutes)...................................................................................................
8-22
Figure 8.10: Voltage V
S
Applied to Series RC Circuit............................................................................8-23
Figure 8.11: Demand Current Logic Outputs ..........................................................................................
8-26
Figure 8.12: Raise Pickup of Residual Ground Time-Overcurrent Element for Unbalance Current......
8-27