CHAPTER 6: ACTUAL VALUES
RECORDS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
6-25
6
The latest 15 fault reports can be stored. The most recent fault location calculation (when applicable) is displayed in this
menu, along with the date and time stamp of the event which triggered the calculation. See the
SETTINGS
PRODUCT
SETUP
FAULT REPORTS
menu for assigning the source and trigger for fault calculations. See the
COMMANDS
CLEAR
RECORDS
menu for manual clearing of the fault reports and to the
SETTINGS
PRODUCT SETUP
CLEAR RELAY RECORDS
menu for automated clearing of the fault reports.
The
FAULT 1 LOOP RESISTANCE
and
REACTANCE
are expressed in secondary ohms, which are calculated as per the following
equation.
Z
loop
= V
loop
/ I
loop
Eq. 6-5
The table defines the loop voltage and current.
Table 6-3: Quantities used to calculate fault loop impedances
Where VA, VB, VC are phase voltage phasors in secondary volts; IA, IB, IC are current phasors in secondary amps, I0 is the
zero sequence current phasors in secondary amps; and IG is the ground current from the parallel line scaled to the source
phase CT in secondary amps. Z0/Z1 is the zero sequence impedance to positive sequence impedance ratio, and Z0M/Z1 is
mutual zero sequence impedance to positive sequence impedance ratio.
6.5.2 Event records
6.5.2.1 Enhanced and standard front panels
ACTUAL VALUES
RECORDS
EVENT RECORDS
FAULT 1 LOOP
REACT: 0.00 Ohms
Range: -327.67 to 327.67 Ohms
Fault type
V
loop
I
loop
AG
VA
IA + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
BG
VB
IB + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
CG
VC
IC + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
AB, ABG
VA – VB
IA - IB
BC, BCG
VB – VC
IB - IC
CA, CAG
VC – VA
IC - IA
ABC
Average of AB, BC, CA loop impedances
VTs of the
FAULT REPORT 1 SOURCE
must be connected in Wye or
VT SUBSTITUTION
must be set correctly for the Delta
connected VT to display the loop impedance and fault resistance for single phase-to-ground faults.
For the application of partially parallel circuits and in the case of single phase-to-ground faults, the reported fault
resistance and fault loop impedance may not be accurate even the compensation method is applied.
EVENT RECORDS
EVENT: XXX
XXX
Date and time stamps
EVENT: 3
POWER ON
EVENT 3
DATE: 2000/07/14
EVENT: 2
POWER OFF
EVENT 3
TIME: 14:53:00.03405
EVENT: 1
EVENTS CLEARED
Содержание L60
Страница 10: ...x L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 122: ...3 72 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL CONNECT TO D400 GATEWAY CHAPTER 3 INSTALLATION 3 ...
Страница 590: ...5 382 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 632: ...7 12 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 736: ...A 14 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 744: ...C 6 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 752: ...iv L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...