5-186 D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
FLEXLOGIC CHAPTER 5: SETTINGS
5
Figure 5-95: FlexElement input mode setting
FLEXELEMENT 1 PICKUP — This 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.
FLEXELEMENT 1 HYSTERESIS — This setting controls the element dropout. Notice 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 5-23: FlexElement base units
Unit Description
BREAKER ACC ARCING AMPS
(Brk X Acc Arc Amp A, B, and C)
BASE = 2000 kA
2
× cycle
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
BASE = 1 kA
2
× cycle
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
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