GE N60 Instruction Manual page 326

CONTROL ELEMENTS
SETTING
Function
Enabled = 1
SOURCE 1
VA
VB
VC
V_2
V_1
I_1
FLEXLOGIC OPERANDS
SRC1 50DD OP
OPEN POLE OP
The OPEN POLE OP operand applies
to the D60, L60, and L90
5
SETTING
Neutral Wire Open Detect
Enabled = 1
SOURCE 1
3V_0 (3rd Harmonic)
5.8.10.3 Thermal overload protection
SETTINGS  CONTROL ELEMENTS  MONITORING ELEMENTS  THERMAL OVERLOAD PROTECTION 
THERMAL PROTECTION 1(2)
 THERMAL
 PROTECTION 1
5-210
Figure 5-105: VT fuse fail logic
VA’, VB’ and VC’ are the
voltage magnitude of one
cycle before
COMPARATORS
Run
|VA’|-|VA| > 0.2 pu
& |VA’| > 0.8 pu
Run
|VB’|-|VB| > 0.2 pu OR
& |VB’| > 0.8 pu
Run
|VC’|-|VC| > 0.2 pu
& |VC’| > 0.8 pu
Run
V_2 > 0.1 pu
OR
Run
V_1 < 0.05 pu
AND
Run
I_1 > 0.075 pu
Run
TIMER
V_1 < 0.80 pu
2 cycles
Run
AND
I_1 < 0.05 pu
AND
OR
AND
AND
SETTING
3 HARM PKP
Run
AND
3V_0 3rd Harm >setting
THERMAL PROTECTION 1

FUNCTION: Disabled
THERMAL PROTECTION 1

SOURCE: SRC1
THERMAL PROTECTION 1

BASE CURR: 0.80 pu
THERMAL PROTECTION 1

k FACTOR: 1.10
THERM PROT 1 TRIP

TIME CONST: 45 min.
THERM PROT 1 RESET

TIME CONST: 45 min.
THERM PROT 1 MINIM

RESET TIME: 20 min.
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
OR
FUSE
FAIL
TIMER
2 cycles
SET
AND
0
Latch
20 cycles
TIMER
30 cycles
RESET
0
Reset-dominant
TIMER
5 cycles
AND
0
TIMER
0
AND 20 cycles
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: 0.20 to 3.00 pu in steps of 0.01
Range: 1.00 to 1.20 in steps of 0.05
Range: 0 to 1000 min. in steps of 1
Range: 0 to 1000 min. in steps of 1
Range: 0 to 1000 min. in steps of 1
CHAPTER 5: SETTINGS
AND
FAULT
OR
FLEXLOGIC OPERANDS
SRC1 VT FUSE FAIL OP
SRC1 VT FUSE FAIL DPO
FLEXLOGIC OPERAND
SRC1 VT FUSE FAIL VOL LOSS
FLEXLOGIC OPERAND
OR
SRC1 VT NEU WIRE OPEN
FLEX-ANALOG
SRC1 3V0 3nd Harmonic
827093AQ.CDR