GE G60 Instruction Manual page 178

5.4 FLEXLOGIC™
The
FLEXELEMENT 1 PICKUP
to "Over", the element picks up when the operating signal exceeds the
element picks up when the operating signal falls below the
The
FLEXELEMENT 1 HYSTERESIS
and the pickup threshold can be negative facilitating applications such as reverse power alarm protection. The FlexEle-
ment™ can be programmed to work with all analog actual values measured by the relay. The
ting is entered in per-unit values using the following definitions of the base units:
5
Table 5–9: FLEXELEMENT™ BASE UNITS
dcmA
FREQUENCY
FREQUENCY RATE OF CHANGE
PHASE ANGLE
POWER FACTOR
RTDs
SENSITIVE DIR POWER
(Sns Dir Power)
SOURCE CURRENT
SOURCE ENERGY
(Positive and Negative Watthours,
Positive and Negative Varhours)
SOURCE POWER
SOURCE VOLTAGE
STATOR DIFFERENTIAL
CURRENT
(Stator Diff Iar, Ibr, and Icr)
STATOR GROUND 3RD
HARMONIC VOLTAGES
(Stator Gnd Vn/V0 3rd)
STATOR RESTRAINING
CURRENT
(Stator Diff Iad, Ibd, and Icd)
SYNCHROCHECK
(Max Delta Volts)
VOLTS PER HERTZ
The
FLEXELEMENT 1 HYSTERESIS
hysteresis loop as a percentage of the pickup value as shown in the FlexElement™ Direction, Pickup, and Hysteresis dia-
gram.
The
FLEXELEMENT 1 DT UNIT
FLEXELEMENT 1 COMP MODE
rate of change mode of operation. This setting is applicable only if
This
FLEXELEMENT 1 PKP DELAY
specifies the reset delay of the element.
5-80
setting specifies the operating threshold for the effective operating signal of the element. If set
setting controls the element dropout. It should be noticed that both the operating signal
BASE = maximum value of the
under the +IN and –IN inputs.
f = 1 Hz
BASE
df/dt = 1 Hz/s
BASE
ϕ
= 360 degrees (see the UR angle referencing convention)
BASE
PF = 1.00
BASE
BASE = 100°C
= maximum value of 3 × V
P
BASE
configured for the sensitive power directional element(s).
I = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
E = 10000 MWh or MVAh, respectively
BASE
P = maximum value of V
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 bus reference primary current for bus differential currents)
V = Primary auxiliary voltage of the
BASE
I = maximum primary RMS value of the +IN and –IN inputs
BASE
(CT primary for source currents, and bus reference primary current for bus differential currents)
V = maximum primary RMS value of all the sources related to the +IN and –IN inputs
BASE
BASE = 1.00 pu
setting defines the pickup–dropout relation of the element by specifying the width of the
setting specifies the time unit for the setting
is set to "Delta". The
FLEXELEMENT 1 DT
setting specifies the pickup delay of the element. The
G60 Generator Management Relay
FLEXELEMENT 1 PICKUP
value.
FLEXELEMENT 1 PICKUP
setting for the two transducers configured
DCMA INPUT MAX
× I
for the +IN and –IN inputs of the sources
BASE BASE
× I for the +IN and –IN inputs
BASE BASE
STATOR GROUND SOURCE
FLEXELEMENT 1 dt
setting specifies duration of the time interval for the
FLEXELEMENT 1 COMP MODE
FLEXELEMENT 1 RST DELAY
5 SETTINGS
value. If set to "Under", the
set-
FLEXELEMENT 1 PICKUP
. This setting is applicable only if
is set to "Delta".
setting
GE Multilin