SATEC PM180 Operation Manual User Manual
Page 65
Chapter 7 Programming the PM180
Device Options
PM180 Substation Automation Unit
63
Option
Range
Default
Description
I4 Max. Load Current, A 0 - 10000 A
CT
The maximum demand load current for I4
(0 = CT primary)
Test Mode
Energy LED pulse rate,
Wh/impulse
0.01-100.00
0.10 Wh/pulse
LED pulse constant - the amount of
accumulated energy (in secondary
readings) giving one pulse via “kWh” and
“kvarh” LEDs.
Energy LED Test
Disabled, Wh
Pulses, varh Pulses
Disabled
LED located in RDM and RGM, for energy
measurement calibration
Data Scales
Volts Scale, V
10-828 V
828 V
The maximum voltage scale allowed, in
secondary volts. See
Appendix E.
Amps Scale, A
1.0-20.0 A
20
The maximum current scale allowed, in
secondary amps. See
Appendix E.
Power Calculation Modes
The power calculation mode option allows you to change the method for calculating
reactive and apparent powers in presence of high harmonics. The options work as
follows:
1. When the reactive power calculation mode is selected, active and reactive powers
are measured directly and apparent power is calculated as:
2
2
Q
P
S
This mode is recommended for electrical networks with low harmonic distortion,
commonly with THD < 5% for volts, and THD < 10% for currents. In networks with
high harmonics, the following method is preferable.
2. When the non-active power calculation mode is selected, active power is
measured directly, apparent power is taken as product S = V x I, where V and I are
the RMS volts and amps, and reactive power (called non-active power) is calculated
as:
2
2
P
S
N