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COMMUNICATION SETUP
0BDNP3 PROTOCOL PROFILE
4.7.3. SIGN OF THE POWER
There are two different choices for the sign of the power factor (single phase and three
phases). The first one is perhaps the most widely used. In it, the sign indicates lag (+)
and lead (-).
The second option is more orthodox and represents the sign of the real power factor
(the cosine of the angle between V and I), which corresponds with the sign of the active
power.
Choosing lag/ lead, the power factor will be positive in quadrants I and III, while it is
negative in quadrants II and IV. By choosing the sign of the cosine of the angle between
V and I, the power factor will be positive for the quadrants I and IV and negative for II
and III.
4.7.4. OUTPUTS OPERATION MODE
Outputs and controls can be operated using DNP3 in one of three modes:
SBO - Select before operate. In this mode using function 3 ( “select”) of the
application layer of DNP3 to prepare or select the operation of the outputs, is
required immediately followed by the order of operation using function 4
(“operate”). The selection and operation requests must be identical, except for the
function itself and the sequence number of the application layer, which should
differ by 1. Finally, the selection expires after 1 second. That is, if more than 1
elapses second between the order of selection and the order of operation, it will
fail as “Timeout”.
DO – Direct operate. In this mode previously preparing or selecting an output
operation is not required. The order of operation by using function 5 of the
application layer of DNP3 is the only one required.
DO-NA – Direct Operate, no acknowledge. This is the less secure mode of
operation. It is similar to direct mode operation. The difference is the absence of
confirmation from the smART P500 that it received and accepted the order of
operation. Uses the function 6 of the application layer of DNP3.
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...