GE 745 Instruction Manual page 190

S4 ELEMENTS
Note
NOTE
5.6.14 Analog Input Level

ANALOG LEVEL 1 [
5–94
Enter the expended life, in hours, required for operation of the element in the
setpoint. This setting should be above the total life of the transformer, in hours. As
PICKUP
an example, for a 15-year transformer, the total number of hours would be 13140 × 10 =
131400 hours.
The actual values are only displayed if the loss of life option is installed and the
ambient temperature is enabled.
FIGURE 5–42: Loss-of-life scheme logic
PATH: SETPOINTS S4 ELEMENTS


] ANALOG INPUT LEVEL 1
FUNCTION: Disabled
ANALOG INPUT LEVEL 1
MESSAGE
RLYS (1-8): --------
ANALOG INPUT LEVEL 1
MESSAGE
TARGET: Self-Reset
ANALOG INPUT LEVEL 1
MESSAGE
PICKUP: 10 μA
ANALOG INPUT LEVEL 1
MESSAGE
DELAY: 50 s
ANALOG INPUT LEVEL 1
MESSAGE
BLOCK: Disabled
The 745 can monitor any external quantity, such as bus voltage, battery voltage, etc., via a
general purpose auxiliary current input called the analog input. Any one of the standard
transducer output ranges 0 to 1 mA, 0 to 5 mA, 4 to 20 mA, or 0 to 20 mA can be
connected to the analog input terminals. The analog input is configured in
SETUP ANALOG INPUT

.
INPUT
ANALOG INPUT

and the actual values displayed in
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
LOSS OF LIFE
ANALOG LEVEL 1(2)

Range: Enabled, Disabled
Range: 1 to 8
Range: Self-Reset, Latched, None
Range: 1 to 65000 μA in steps of 1
Range: 0 to 60000 s in steps of 1
Range: Logc Inpt 1 to 16, Virt Inpt 1 to
16, Output Rly 2 to 8, SelfTest
Rly, Vir Outpt 1 to 5, Disabled
S2 SYSTEM
A2 METERING ANALOG
