1BPROTECTION FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
Permission if there is no voltage at either side of the switch.
Permission if there is no voltage at the bus side but there is at the load side.
Permission if there is no voltage at the load side but there is at the bus side.
The no voltage state is achieved at either side of the switch when the
measured voltage is lower than the programmed value for the respective side.
If there is voltage at both sides then the actuation function is the “Synchronism
permission”.
The low voltage conditions analysis is performed only if the synchrocheck
function is enabled. If the function is disabled, close permission is given.
Synchronism permission.
Permission is given if for a programmable time the
following conditions are met:
The difference between line voltage and bus voltage is lower than the
programmed value.
The difference between the phase angles is lower than the programmed
value.
The frequency difference is lower than the programmed value.
Figure 2-35 shows the logical diagram for the synchrocheck function with
synchronism permission.
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...