![background image](http://html1.mh-extra.com/html/arteche/smart-p500/smart-p500_instruction-manual_2977391116.webp)
1BPROTECTION FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
2.1.15.8. SEQUENCE COORDINATION.
The goal of this function is to allow the recloser to advance along the sequence of
recloses when it senses a fault that is being interrupted by another similar device
downstream although it does not trip its own breaker.
If the coordination function is enabled the recloser will enter the ongoing cycle as it
detects a pickup followed by a protection relapse instead of a trip as it usually
happens. From this moment on the recloser will count the current interruptions, as its
own trips and the current repositions as its own recloses.
For instance if there are two reclosers connected to the same distribution line, the
one closer to the fault (Recloser number 1) will perform the trip and reclose
operations while the one closer to the substation (Recloser number 2)simply
“follows” the cycle. If three fast trips and one slow trip have been pre-programmed in
both reclosers the number 1 will have its four trips and will finally go to definitive trip
while number 2 will not act at all. Without coordination recloser number 1 will trip 3
times, recloser number 2 will also trip 3 times and a final trip from recloser number
one will finally isolate the fault. This will unnecessarily interrupt the line from recloser
number 2 to recloser number 1, three times.
This function must only be enabled using the software.
2.1.15.9. HIGH CURRENT LOCKOUT
2.1.15.9.1. DESCRIPTION
There are two other instantaneous settings groups, one for the phases and other
for the neutral. If they trip, the protection status will change to Definitive Trip.
The user can select if the trip is applied after the first pickup or after one of the
subsequent recloses. Bus voltage supervision can be included as a reclose
enabler for each cycle.
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...