GE T60 Instruction Manual page 441
Transformer protection system
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- Instruction manual (796 pages) ,
- Communications manual (532 pages) ,
- Communications manual (526 pages)
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CHAPTER 5: SETTINGS
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
Figure 5-114: Non-volatile latch operation table (N = 1 to 16) and logic
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
LATCH 1 TYPE:
Reset Dominant
LATCH 1 SET:
Off
LATCH 1 RESET:
Off
LATCH 1
TARGET: Self-reset
LATCH 1
EVENTS: Disabled
Latch n type Latch n
Latch n
set
reset
Reset
ON
OFF
Dominant
OFF
OFF
ON
ON
OFF
ON
Set
ON
OFF
Dominant
ON
ON
OFF
OFF
OFF
ON
Range: Reset Dominant, Set Dominant
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
Latch n
Latch n
on
off
ON
OFF
Previous
Previous
State
State
OFF
ON
OFF
ON
ON
OFF
ON
OFF
Previous
Previous
State
State
OFF
ON
FLEXLOGIC
5
5-223
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