Non-Volatile Latches - GE T35 Instruction Manual

CHAPTER 5: SETTINGS
Unit
FREQUENCY
PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE POWER
SOURCE VOLTAGE
XFMR DIFFERENTIAL CURRENT
(Xfmr Iad, Ibd, and Icd Mag)
XFMR DIFFERENTIAL HARMONIC
CONTENT
(Xfmr Harm2 Iad, Ibd, and Icd Mag)
(Xfmr Harm5 Iad, Ibd, and Icd Mag)
XFMR RESTRAINING CURRENT
(Xfmr Iar, Ibr, and Icr Mag)
— This setting defines the pickup–dropout relation of the element by specifying the width of the
FLEXELEMENT 1 HYSTERESIS
hysteresis loop as a percentage of the pickup value as shown in the FlexElement Direction, Pickup, and Hysteresis diagram.
— Specifies the time unit for the setting
FLEXELEMENT 1 dt UNIT
is set to "Delta."
FLEXELEMENT 1 COMP MODE
— Specifies duration of the time interval for the rate of change mode of operation. This setting is
FLEXELEMENT 1 dt
applicable only if
FLEXELEMENT 1 COMP MODE
— Specifies the pickup delay of the element.
FLEXELEMENT 1 PKP DELAY
— Specifies the reset delay of the element.
FLEXELEMENT 1 RST DELAY

5.6.8 Non-volatile latches

SETTINGS  FLEXLOGIC  NON-VOLATILE LATCHES  LATCH 1(16)
 LATCH 1

The non-volatile latches provide a permanent logical flag that is stored safely and do not reset upon restart after the relay
is powered down. Typical applications include sustaining operator commands or permanently blocking relay functions,
such as Autorecloser, until a deliberate interface action resets the latch.
— This setting characterizes Latch 1 to be Set- or Reset-dominant.
LATCH 1 TYPE
— If asserted, the specified FlexLogic operands 'sets' Latch 1.
LATCH 1 SET
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Description
f = 1 Hz
BASE
ϕ = 360 degrees (see the UR angle referencing convention)
BASE
PF = 1.00
BASE
BASE = 100°C
I = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
P = maximum value of V
BASE BASE
V = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
I = maximum primary RMS value of the +IN and -IN inputs
BASE
(CT primary for source currents, and transformer reference primary current for transformer
differential currents)
BASE = 10%
I = maximum primary RMS value of the +IN and -IN inputs
BASE
(CT primary for source currents, and transformer reference primary current for transformer
differential currents)
FLEXELEMENT 1 dt
is set to "Delta."
LATCH 1

FUNCTION: Disabled
LATCH 1 ID:

NV Latch 1
LATCH 1 TYPE:

Reset Dominant
LATCH 1 SET:

Off
LATCH 1 RESET:

Off
LATCH 1

TARGET: Self-reset
LATCH 1

EVENTS: Disabled
× I for the +IN and –IN inputs
BASE
. This setting is applicable only if
Range: Disabled, Enabled
Range: up to 20 alphanumeric characters
Range: Reset Dominant, Set Dominant
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
FLEXLOGIC
5
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