GE 745 Instruction Manual page 137

CHAPTER 5: SETPOINTS
5.4.9 Analog Input

ANALOG INPUT [
5.4.10 Demand Metering

DEMAND METERING [
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PATH: SETPOINTS S2 SYSTEM SETUP


] ANALOG INPUT NAME:
Analog Input
ANALOG INPUT UNITS:
MESSAGE
μA
ANALOG INPUT RANGE:
MESSAGE
0-1 mA
ANALOG INPUT MINIMUM
MESSAGE
VALUE:
ANALOG INPUT MAXIMUM
MESSAGE
VALUE: 1000 μA
The 745 provides a general purpose DC current input for use in monitoring any external
parameter. Any standard transducer output may be connected to the analog input for
monitoring.
• ANALOG INPUT NAME: Press ENTER to begin editing the name of the analog input.
The text may be changed from "Analog Input" one character at a time, using the
VALUE keys. Press the ENTER key to store the edit and advance to the next character
position. This name will appear in the actual value message
ANALOG INPUT.
• ANALOG INPUT UNITS: Enter the units of the quantity being read by editing the text as
described above. The six characters entered will be displayed instead of "Units"
wherever the analog input units are displayed.
• ANALOG INPUT RANGE: Select the current output range of the transducer that is
connected to the analog input. The units are defined by the
setpoint.
• ANALOG INPUT MINIMUM/MAXIMUM: Enter the value of the quantity measured
which corresponds to the minimum/maximum output value of the transducer. The
units are defined by the
PATH: SETPOINTS S2 SYSTEM SETUP


] CURRENT DEMAND METER
TYPE: Thermal
THERMAL 90% RESPONSE
MESSAGE
TIME: 15 min.
TIME INTERVAL:
MESSAGE
20 min.
This section assigns the demand setpoints for monitoring current demand on all three
phases of each windings. Current demand on the 745 is performed one of three ways:
thermal, rolling demand, or block interval.
• CURRENT DEMAND METER TYPE: Select the method to be used for the current
demand metering.
ANALOG INPUT

0 μA
setpoint.
ANALOG INPUT UNITS
DEMAND METERING

S2 SYSTEM SETUP
Range: 18 alphanumeric characters
Range: 6 alphanumeric characters
Range: 0-1 mA, 0-5 mA, 4-20 mA, 0-20
mA.
Range: 0 to 65000 in steps of 1
Range: 0 to 65000 in steps of 1
A2 METERING

ANALOG INPUT UNITS
Range: Thermal, Block Interval, Rolling
Demand
Range: 5, 10, 15, 20, 25, 30, 60 min.
Range: 5, 10, 15, 20, 25, 30, 60 min.
(see note below)
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