Grouped Elements; Overview; Setting Group 1 - GE M60 Instruction Manual

GROUPED ELEMENTS

The non-volatile latches provide a permanent logical flag that is stored safely and do not reset upon restart after the relay
is powered down. Typical applications include sustaining operator commands or permanently blocking relay functions,
such as Autorecloser, until a deliberate interface action resets the latch.
— 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
Latch n Latch n
type set
Reset ON
Dominant
OFF
ON
OFF
Set ON
Dominant
ON
OFF
OFF
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, season of
the year, and so on). The active setting group can be preset or selected in the
Elements section 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

5-156
Figure 5-73: Non-volatile latch operation table (N = 1 to 16) and logic
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
 MOTOR


 STATOR

 DIFFERENTIAL
 POWER


 PHASE CURRENT


 NEUTRAL CURRENT


 GROUND CURRENT


 BREAKER FAILURE


menu (see the Control
SETTING GROUPS
See below
See page 5-188
See page 5-191
See page 5-196
See page 5-200
See page 5-206
See page 5-214
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS