GE L30 Instruction Manual page 364

FLEXLOGIC
5
FLEXELEMENT 1 PICKUP
set to "Over," the element picks up when the operating signal exceeds the
element picks up when the operating signal falls below the
FLEXELEMENT 1 HYSTERESIS
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
per-unit values using the following definitions of the base units.
Table 5-26: FlexElement base units
Unit
87L SIGNALS
(Local IA Mag, IB, and IC)
(Diff Curr IA Mag, IB, and IC)
(Terminal 1 IA Mag, IB, and IC)
(Terminal 2 IA Mag, IB and IC)
87L SIGNALS
(Op Square Curr IA, IB, and IC)
(Rest Square Curr IA, IB, and IC)
5-186
Figure 5-93: FlexElement input mode setting
— This setting specifies the operating threshold for the effective operating signal of the element. If
— This setting controls the element dropout. Notice that both the operating signal and the
Description
I = maximum primary RMS value of the +IN and –IN inputs
BASE
(CT primary for source currents, and 87L source primary current for line differential currents)
BASE = Squared CT secondary of the 87L source
FLEXELEMENT 1 PICKUP
value.
FLEXELEMENT 1 PICKUP
FLEXELEMENT 1 PICKUP
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
value. If set to "Under," the
setting is entered in