GE N60 Instruction Manual page 418

CONTROL ELEMENTS
An additional condition is introduced to inhibit a fuse failure declaration when the monitored circuit is de-energized;
positive-sequence voltage and current are both below threshold levels.
VT FUSE FAILURE 1 FUNCTION
NEUTRAL WIRE OPEN 1 DETECTION
connected in Delta, do not enable this function because there is no neutral wire for Delta connected VT.
NEUTRAL WIRE OPEN 1 3 HRAM PKP
logic to pick up.
DETECTION
Base voltage for this element is
of DELTA VTs. The setting is found under
5
5.8.10.4 Thermal overload protection (ANSI 49)
SETTINGS  CONTROL ELEMENTS  MONITORING ELEMENTS  THERMAL OVERLOAD PROTECTION 
THERMAL PROTECTION 1(2)
 THERMAL
 PROTECTION 1
5-258
— Enables and disables the fuse failure feature for Source 1 VT Fuse Fail.
— Enables and disables the VT neutral wire open detection function. When the VT is
— Specifies the pickup level of 3rd harmonic of 3V0 signal for the
setting in the case of WYE VTs and (
PHASE VT SECONDARY
SETTINGS  SYSTEM SETUP  AC INPUTS  VOLTAGE BANK  PHASE VT SECONDARY
Figure 5-140: VT fuse fail logic
THERMAL PROTECTION 1

FUNCTION: Disabled
THERMAL PROTECTION 1

SOURCE: SRC1
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
NEUTRAL WIRE OPEN
PHASE VT SECONDARY
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
)/ in case
.