Transformer Overload - GE Multilin 745 Instruction Manual

745
Transformer Management Relay

Transformer Overload

! XFORMER
OVERLOAD
5–84
PATH: SETPOINTS !" S4 ELEMENTS
[!] TRANSFORMER OVERLOAD
FUNCTION: Disabled
TRANSFORMER OVERLOAD
MESSAGE
TARGET: Self-Reset
TRANSFORMER OVERLOAD
MESSAGE
PICKUP: 208% rated
TRANSFORMER OVERLOAD
MESSAGE
DELAY:
TRANSFORMER OVERLOAD
MESSAGE
BLOCK: Disabled
XFMR OVERTEMP ALARM
MESSAGE
SIGNAL: Disabled
• TRANSFORMER OVERLOAD PICKUP: This setting identifies the level of
transformer overload, where the pickup delay starts timing. The setting is
expressed as a percentage of the transformer base MVA rating, and is normally
set at or above the maximum rated MVA from the transformer nameplate.
• XFMR OVERTEMP ALARM SIGNAL: 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.
FIGURE 5–44: Transformer Overload Scheme Logic
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!" XFORMER OVERLOAD
Range: Enabled, Disabled
Range: Self-Reset, Latched, None
Range: 50 to 300% of Rated Load in
steps of 1
Range: 0 to 60000 s in steps of 1
10 s
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled
Range: Disabled, Logc Inpt 1 to 16
S4 Elements
GE Multilin