GROUPED ELEMENTS
— This setting characterizes Latch 1 to be Set- or Reset-dominant.
LATCH 1 TYPE
— If asserted, the specified FlexLogic operands 'sets' Latch 1.
LATCH 1 SET
— If asserted, the specified FlexLogic operand 'resets' Latch 1.
LATCH 1 RESET
5
5.7 Grouped elements
5.7.1 Overview
Each protection element can be assigned up to six sets of settings with designations 1 to 6. The performance of these
elements is defined by the active setting group at a given time. Multiple setting groups allow the user to conveniently
change protection settings for different operating situations (for example, altered power system configuration or season of
the year). The active setting group can be preset or selected in the
later in this chapter). See also the Introduction to Elements section at the beginning of this chapter.
5.7.2 Setting group 1
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6)
SETTING GROUP 1
5-188
Figure 5-96: Non-volatile latch operation table (N = 1 to 16) and logic
Latch n type Latch n
set
Reset
ON
Dominant
OFF
ON
OFF
Set
ON
Dominant
ON
OFF
OFF
LINE PICKUP
DISTANCE
Latch n
Latch n
Latch n
reset
on
off
OFF
ON
OFF
OFF
Previous
Previous
State
State
ON
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
OFF
Previous
Previous
State
State
ON
OFF
ON
menu (see the Control Elements section
SETTING GROUPS
See below
See page 5-191
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS