8
Project 2187 Drawing No. CI-3K51101 Rev 10
DMR 2720 18/07/11
Modbus is a Trademark of Schneider Automation Inc. Other Trademarks or company
names mentioned herein are the property of their respective owners.
5.7.3 RATE (Pulsed Output Rate)
This screen allows the user to adjust the number of kWh or kVArh’s per output pulse:
Scroll through the following options:
0.1
(1 pulse per 0.1 kWh/kVArh)
1
(1 pulse per 1 kWh/kVArh)
10
(1 pulse per 10 kWh/kVArh)
100
(1 pulse per 100 kWh/kVArh)
1000
(1 pulse per 1000 kWh/kVArh)
Once the desired pulse rate has been selected, press to confirm.
5.7.4 PULS (Pulse Width)
This screen allows adjustment to the duration of the relay output pulse. Values are displayed in
milliseconds (ms).
Scroll through the following options:
60
(60ms)
100
(100ms)
200
(200ms)
Once the desired pulse rate has been selected, press to confirm.
5.8 NRGY (Energy)
This screen selects either kWh/kVArh or MWh/MVArh Energy readings.
Scroll through the following options:
KILO
MEGA
Once the desired energy setting has been selected, press to confirm.
5.9 TEST (Product Self Tests)
This screen allows the selection of a number of self diagnostic test routines.
Scroll through the following options:
dISP ON
This test illuminates all the LCD segments to identify any display errors.
dISP TOGL
This test toggles on and off alternate halves of the LCD segments, to determine if any
are stuck either on or off.
PHAS SEQ
This test determines if the Voltage and Current connections to the Ci3 meter are correct.
If all the connections are correct the product will display V 123 and I 123. For example,
if the product displayed V 132 and I 123 this would indicate that the Voltage connections
are in reverse sequence and need to be changed.
Once the desired self test has been selected, press to confirm.
Refer to basis of measurement and calculations for qualifying conditions, 6.7.
5.10 SOFT (Software Version Number)
This screen displays the version number of the software installed in the Integra Ci3 digital meter.
6. Basis of measurement and calculations
6.1 Phase to Phase voltages
Phase to Phase voltages are measured directly and calculated as RMS values. Situations where the
phases are not spaced 120 degrees apart (e.g. 4 wire open delta) are indicated correctly.
6.2 Reactive and Apparent Power
Active powers are calculated directly by multiplication of voltage and current samples. Reactive powers are
calculated using the frequency corrected quarter phase time delay method. Apparent power is calculated as
the square root of the sum of the squares of active and reactive powers.
6.3 Energy resolution
Cumulative energy counts are reported using the standard IEEE floating point format. Reported energy
values in excess of one million may show a small non cumulative error in the integer digits due to the