![background image](http://html1.mh-extra.com/html/arteche/smart-p500/smart-p500_instruction-manual_2977391402.webp)
COMMUNICATION SETUP
0BDNP3 PROTOCOL PROFILE
that the scaling works correctly the 16-bit analog behaviour should be set to “Scale”,
otherwise, the values entered here are without effect.
There is a field for voltages, another for currents, a third one for frequency and the last
one for powers.
In each of these fields the maximum expected value for the indicated magnitude must
be introduced. The value obtained when the point is read using 16-bit variations will
result from the following expression:
Vscale
Vmes
V
×
=
32767
From the equation, when the measured value (Vmes) is equal to the value declared at
full scale (Vscale) the result is 32,767 that is the maximum size that can be represented
using variations in 16-bit for analog points.
Any Vmes > Vscale will result in a value greater than 32767 and will be reported as
32,767 with the notation “Overflow”. The lowest value that can be obtained is -32768
which corresponds to a negative similar measured value. Accordingly, it is
recommended to leave a margin to handle exceptional circumstances. The margin
should be chosen so that the different circumstances that vary from one installation point
to another are taken into account.
For example, if the nominal value of the work line is 5 amperes and can manage a
maximum load of 10 in a continuous regime, a reasonable range could be provided by a
full-scale value of 12 amperes (20% margin).
4.7.2. DEAD BANDS
There are two dead bands, one for analog values and one for counters. In the case of
analog values the dead band is expressed as a percentage of the reading, while for
counters it is expressed as a number of counts represented in kilo units (kXh). Ie, kW,
kvar, kVA, and so on, depending on the parameter to which a specific counter refers.
Summary of Contents for smART P500
Page 1: ...Instruction Manual Multifunction Protection Relay smART P500...
Page 23: ...2BTABLES INDEX THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY...
Page 39: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 9 Wye Wye Connection measured neutral...
Page 40: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 10 Wye Wye Connection sensitive neutral...
Page 41: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 11 Open Delta Connection measured neutral...
Page 42: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 12 Open Delta Connection sensitive neutral...
Page 511: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 6 Moderately ANSI curve...
Page 513: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 7 Very inverse ANSI curve...
Page 515: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 8 Extremely inverse ANSI curve...
Page 532: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 14 Recloser Curves 101 119...
Page 535: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 15 Recloser Curves 120 142...
Page 538: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 16 Recloser Curves 151 202...