GE UR Series B30 Instruction Manual page 231

5 SETTINGS
The setting specifies the operating threshold for the effective operating signal of the element. If set
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:
Table 5–10: FLEXELEMENT™ BASE UNITS
BUS DIFFERENTIAL
RESTRAINING CURRENT
(Bus Diff Mag)
BUS DIFFERENTIAL
RESTRAINING CURRENT
(Bus Rest Mag)
DCmA
FREQUENCY
PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE POWER
SOURCE VOLTAGE
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 setting specifies the time unit for the setting
FLEXELEMENT 1 DT UNIT
is set to "Delta". The
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.
GE Multilin
FLEXELEMENT 1 PICKUP
setting controls the element dropout. It should be noticed that both the operating signal
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)
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)
BASE = maximum value of the
under the +IN and –IN inputs.
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
setting defines the pickup–dropout relation of the element by specifying the width of the
FLEXELEMENT 1 DT
setting specifies the pickup delay of the element. The
B30 Bus Differential System
FLEXELEMENT 1 PICKUP
value.
setting for the two transducers configured
DCMA INPUT MAX
× I
for the +IN and –IN inputs
BASE
. This setting is applicable only if
FLEXELEMENT 1 dt
setting specifies duration of the time interval for the
FLEXELEMENT 1 COMP MODE
FLEXELEMENT 1 RST DELAY
5.5 FLEXLOGIC™
value. If set to "Under", the
set-
FLEXELEMENT 1 PICKUP
is set to "Delta".
setting
5-107
5