E-Mon E-PS-A-RTU-N - Manual (Page 149)

Appendix F Data Scales
PowerSmart+ Advanced Power Quality Meter 149
Appendix F Data Scales
The maximum values for volts, amps and power in the PowerSmart+ Advanced PQM setup
and in communications are limited by the voltage and current scale settings. See
Device
Options in Chapter 4 on how to change the voltage scale in your meter.
The following table defines the meter data scales.
Scale Conditions Range
Maximum voltage
(V max) All configurations Voltage scale × PT Ratio, V 1
Maximum current
(I max) All configurations Current scale × CT Ratio, A 2, 3
Wiring 4LN3, 3LN3, 3BLN3 V max × I max × 3, W Maximum Power
(P max)
4
Wiring 4LL3, 3LL3, 3BLL3,
3OP2, 3OP3, 3DIR2 V max × I max × 2, W
Maximum
frequency 50 or 60 Hz 100 Hz
1 The default voltage scale is 144V. The recommended voltage scale is 120V+20% = 144V
for using with external PT’s, and 690V+20% = 828V for a direct connection to power line.
2 CT Ratio = CT primary current/CT secondary current
3 The default current scale is 2 × CT secondary (2.0A with 1A secondaries and 10.0A with 5A
secondaries) .
4 Maximum power is rounded to whole kilowatts. With PT=1.0, it is limited to 9,999,000 W.