6-6
Reporting and Alarm Functions
BE1-951
Primary VT Ratio Primary CT Ratio
60 minutes
Secondary watts or vars
X
X
Equation 6-1. Energy Data Equation
Other Report-General Commands
There are several other RG commands in addition to the RG-STAT command. These include RG-TIME,
RG-DATE, RG-TARG, and RG-VER. These commands are covered in detail in respective paragraphs in
this section. As with other commands, a combination read command is available to read several items in
a group. If the command RG is entered by itself, the relay reports the time, date, target information, and
other reports in the following example. RG-VER and RG-STAT commands have multiple line outputs and
these are not read at the RG command.
Combination RG Read Command Example
1.
Read the general reports.
>RG
RG-DATE=12/31/99
RG-TIME=23:59:59
RG-TARG=NONE
ENERGY DATA
Energy information in the form of watt-hours and var-hours is measured and reported by the BE1-951. Both
positive and negative values are reported in three-phase, primary units. Watt-hour and var-hour values are
calculated per minute as shown in Equation 6-1.
Watt and var values are updated every 250 milliseconds and watt-hour and var-hour values are logged once
every minute. Energy registers are stored in nonvolatile memory during power down.
Watt-hour values and var-hour values can be read, reset, or changed through the HMI or communication
ports. Watt-hour values can be accessed at the HMI through screens 4.5.1 (positive values) and 4.5.2
(negative values). Var-hour values can be accessed at the HMI through screens 4.5.3 (positive values) and
4.5.4 (negative values). ASCII command RE-KWH (report energy–kilowatt-hours) gives access to both
positive and negative watt-hour values. A lagging power factor load will report positive watts and positive
vars.
RE-KWH Command
Purpose:
Read, change, or reset the three-phase watt-hours in primary units.
Syntax:
RE-KWH[=<x>,<y>]
Comments:
x or y = 0 to 100,000 (values must be entered in kilowatt-hours)(x=positive, y=negative)
Although y represents negative values, only positive values will be recognized by the relay.
A maximum value of 100 MWh is reported.
RE-KWH Command Examples
1.
Obtain the current watt-hour values.
>RE-KWH
RE-KWH=24.01MWH, -2720.26KWH
2.
Reset the positive and negative watt-hour values.
>RE-KWH=0
ASCII command RE-KVAR (report energy–kilovar-hours) gives access to both positive and negative var-
hour values.
