Event Records - GE L60 Instruction Manual

RECORDS
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
SETUP  FAULT REPORTS
menu for manual clearing of the fault reports and to the
RECORDS
menu for automated clearing of the fault reports.
The
FAULT 1 LOOP RESISTANCE
equation.
The table defines the loop voltage and current.
Table 6-3: Quantities used to calculate fault loop impedances
Fault type V
loop
AG VA
BG VB
CG VC
AB, ABG VA – VB
BC, BCG VB – VC
CA, CAG VC – VA
ABC Average of AB, BC, CA 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.
VTs of the
6 FAULT REPORT 1 SOURCE
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.

6.5.2 Event records

ACTUAL VALUES  RECORDS  EVENT RECORDS
 EVENT RECORDS

The event records menu shows the contextual data associated with up to the last 1024 events, listed in chronological
order from most recent to oldest. When all 1024 event records have been filled, the oldest record is removed as a new
record is added. Each event record shows the event identifier/sequence number, cause, and date/time stamp associated
with the event trigger. See the
6-24
FAULT 1 LOOP

REACT: 0.00 Ohms
menu for assigning the source and trigger for fault calculations. See the
and are expressed in secondary ohms, which are calculated as per the following
REACTANCE
Z = V
loop
I
loop
IA + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
IB + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
IC + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3
IA - IB
IB - IC
IC - IA
must be connected in Wye or
EVENT: XXX

XXX
EVENT: 3

POWER ON
EVENT: 2

POWER OFF
EVENT: 1

EVENTS CLEARED

COMMANDS  CLEAR RECORDS
Range: -327.67 to 327.67 Ohms
SETTINGS  PRODUCT SETUP  CLEAR RELAY RECORDS
/ I
loop loop
VT SUBSTITUTION

 

menu for clearing event records.
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: ACTUAL VALUES
SETTINGS  PRODUCT
COMMANDS  CLEAR
Eq. 6-5
must be set correctly for the Delta
Date and time stamps
EVENT 3
DATE: 2000/07/14
EVENT 3
TIME: 14:53:00.03405