Schweitzer Engineering Laboratories SEL-311C - Energy Metering; View or Reset Energy Metering Information; Energy Metering Updating and Storage

8.28
SEL-311C Relay Instruction Manual Date Code 20060320
Breaker Monitor and Metering Functions
Energy Metering
Energy Metering
View or Reset Energy
Metering Information
Via Serial Port
See MET E—Energy Metering on page 10.22. The MET E command displays
accumulated single- and three-phase megawatt and megavar hours. The
MET RE command resets the accumulated single- and three-phase megawatt
and megavar hours.
Via Front Panel
The information and reset functions available via the previously discussed
serial port commands MET E and MET RE are also available via the front-
panel {METER} pushbutton. See Figure 11.2.
Energy Metering
Updating and Storage
The SEL-311C updates energy values approximately every two seconds.
The relay stores energy values to nonvolatile storage once per day (it
overwrites the previous stored value). Should the relay lose control power, it
will restore the energy values saved by the relay at 23:50 hours on the previous
day.