GE b30 Instruction Manual page 331

CHAPTER 5: SETTINGS
— This setting specifies the operating threshold for the effective operating signal of the element. If
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
— This setting controls the element dropout. Notice that both the operating signal and 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 5-22: FlexElement base units
Unit
BREAKER ACC ARCING AMPS
(Brk X Acc Arc Amp A, B, and C)
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
BUS DIFFERENTIAL RESTRAINING
CURRENT
(Bus Diff Mag)
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
Figure 5-83: FlexElement input mode setting
FLEXELEMENT 1 PICKUP
Description
2
× cycle
BASE = 2000 kA
2
× cycle
BASE = 1 kA
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)
value. If set to "Under," the
FLEXELEMENT 1 PICKUP
value.
setting is entered in
FLEXELEMENT 1 PICKUP
FLEXLOGIC
5
5-165