GE 845 Instruction Manual page 357

CHAPTER 4: SETPOINTS
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PICKUP
Range: 50 to 300 in steps of 1 degree (in degrees
Default: 140
Enter the hottest-spot temperature required for operation of the element. This setting
must be defined based on the maximum permissible hottest-spot temperature under
emergency transformer loading conditions, and the maximum ambient temperature.
PICKUP DELAY
Range: 0 to 60000 min in steps of 1 min
Default: 1 min
This setting is used to select a pickup time delay that is used to delay the operation of
the protection.
OUTPUT RELAY 1 (X)
Range: Do Not Operate, Operate
Default: Do Not Operate
The menu includes a list of available output relays to be set for operation or no operation
upon protection operation.
BLOCK
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
EVENTS
Range: Enabled, Disabled
Default: Enabled
The selection of the
Enabled
TARGETS
Range: Disabled, Self-reset, Latched
Default: Self-reset
The selection of the
Self-reset
function.
Figure 4-102: Hottest-Spot Logic diagram
°
F or °C)
setting enables the events function.
or settings enables the target messages of the
Latched
MONITORING
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