GE Multilin 745

S4 Elements745
Transformer Management Relay
Setpoints
http://www.GEindustrial.com/multilin
5–70
GE Multilin
d) Overfrequency
PATH: SETPOINTS !" S4 ELEMENTS !" FREQUENCY !" OVERFREQUENCY 1(2)
• MINIMUM OPERATING CURRENT: Enter the minimum value of Winding 1
Phase A current (in units of relay nominal current) required to allow the
overfrequency element to operate.
• MINIMUM OPERATING VOLTAGE: Enter the minimum voltage value (in units
of relay nominal voltage) required to allow overfrequency to operate.
• OVERFREQUENCY PICKUP: Enter the frequency (in Hz) above which the
overfrequency element will pickup and start the delay timer.
• OVERFREQUENCY DELAY: Enter the time that the frequency must remain
above the pickup level before the element operates.
FIGURE 5–31: Overfrequency Scheme Logic
! OVERFREQUENCY [!] OVERFREQUENCY
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
OVERFREQUENCY
TARGET: Latched
Range: Self-Reset, Latched, None
MESSAGE
CURRENT SENSING:
Enabled
Range: Enabled, Disabled
MESSAGE
MINIMUM OPERATING
CURRENT: 0.20 x CT
Range: 0.20 to 1.00 x CT in steps of
0.01
MESSAGE
MINIMUM OPERATING
VOLTAGE: 0.50 x VT
Range: 0.10 to 0.99 x CT in steps of
0.01
MESSAGE
OVERFREQUENCY
PICKUP: 60.50 Hz
Range: 50.01 to 65.00 Hz in steps of
0.01
MESSAGE
OVERFREQUENCY
DELAY: 5.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
OVERFREQUENCY
BLOCK: Disabled
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled