GE 745 TRANSFORMER MANAGEMENT RELAY, Instruction Manual

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5-78 745 Transformer Management Relay GE Power Management
5.6 S4 ELEMENTS 5 SETPOINTS
5
5.6.19 TRANSFORMER OVERLOAD
This section contains the settings to configure the transformer overload monitoring element.
y
XFORMER OVERLOAD
y
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TRANSFORMER OVERLOAD
section. To
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TRANSFORMER OVERLOAD
FUNCTION: Disabled
Range: Disabled / Enabled
TRANSFORMER OVERLOAD
TARGET: Self-reset
Range: Self-reset / Latched / None
Select None to inhibit the display of the target message when the element
operates. Thus an element whose “target type” is None never disables the
LED self-test feature since it cannot generate a displayable target message.
TRANSFORMER OVERLOAD
PICKUP: 208% rated
Range: 50 to 300 (steps of 1)
Enter the transformer loading (in terms of the percent of rated load) above
which the transformer overload element will pickup and start the delay timer.
TRANSFORMER OVERLOAD
DELAY: 10 s
Range: 0 to 60000 (steps of 1)
Enter the time that the transformer loading must remain above the pickup
level before the element operates.
TRANSFORMER OVERLOAD
BLOCK: Disabled
Range: Disabled / Logc Inpt 1 (2-16) /Virt Inpt 1 (2-16) / Output Rly 1 (2-8) /
SelfTest Rly / Virt Outpt 1 (2-5)
XFMR OVERTEMP ALARM
SIGNAL: Disabled
Range: Disabled / Logc Inpt 1 (2-16)
Select any logic input that, when asserted, indicates the transformer cooling
system has failed and an over-temperature condition exists. The logic input
should be connected to the transformer winding temperature alarm contacts.
E N T E R
M E SSA G E