GE T60

GE Multilin T60 Transformer Protection System 5-177
5 SETTINGS 5.5 FLEXLOGIC
5
Figure 5–68: FLEXELEMENT INPUT MODE SETTING
The
FLEXELEMENT 1 PICKUP setting specifies the operating threshold for the effective operating signal of the element. If set
to “Over”, the element picks up when the operating signal exceeds the
FLEXELEMENT 1 PICKUP value. If set to “Under”, the
element picks up when the operating signal falls below the FLEXELEMENT 1 PICKUP value.
The FLEXELEMENT 1 HYSTERESIS setting controls the element dropout. It should be noticed that both the operating signal
and the pickup threshold can be negative facilitating applications such as reverse power alarm protection. The FlexElement
can be programmed to work with all analog actual values measured by the relay. The FLEXELEMENT 1 PICKUP setting is
entered in per-unit values using the following definitions of the base units:
Table 5–22: FLEXELEMENT BASE UNITS
dcmA BASE = maximum value of the DCMA INPUT MAX setting for the two transducers configured
under the +IN and –IN inputs.
DELTA TIME BASE = 1 µs
FREQUENCY f
BASE
= 1 Hz
FREQUENCY RATE OF CHANGE df/dt
BASE
= 1 Hz/s
PHASE ANGLE 
BASE
= 360 degrees (see the UR angle referencing convention)
POWER FACTOR PF
BASE
= 1.00
RTDs BASE = 100°C
SOURCE CURRENT I
BASE
= maximum nominal primary RMS value of the +IN and –IN inputs
842706A2.CDR
FlexElement 1 OpSig
FLEXELEMENT 1 PKP
FLEXELEMENT
DIRECTION = Over;
FLEXELEMENT INPUT
MODE = Signed;
FlexElement 1 OpSig
FLEXELEMENT 1 PKP
FLEXELEMENT
DIRECTION = Over;
FLEXELEMENT INPUT
MODE = Absolute;
FlexElement 1 OpSig
FLEXELEMENT 1 PKP
FLEXELEMENT
DIRECTION = Under;
FLEXELEMENT INPUT
MODE = Signed;
FlexElement 1 OpSig
FLEXELEMENT 1 PKP
FLEXELEMENT
DIRECTION = Under;
FLEXELEMENT INPUT
MODE = Absolute;