Setpoints; Overview; Setpoint Groups; Flexcurves - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

5 SETPOINTS

5 SETPOINTS 5.1 OVERVIEW
The 745 relay has a considerable number of programmable settings (setpoints) which makes it extremely flex-
ible. The setpoints have been grouped into a number of pages as shown below. If using the 745PC software
and not connected to a relay, you may have to select the File > Properties menu item and set the correct
options for your relay.
SS SETPOINTS
SS S1 745 SETUP
SS SETPOINTS
SS S2 SYSTEM SETUP
SS SETPOINTS
SS S3 LOGIC INPUTS
SS SETPOINTS
SS S4 ELEMENTS
SS SETPOINTS
SS S5 OUTPUTS
SS SETPOINTS
SS S6 TESTING
GE Power Management
• Passcode
• Preferences (beeper, flash and default messages)
• Communications (address, COM1 and COM2 parity / hardware type / baud rate)
• Resetting
• Clock
• Default Messages
• Scratch Pad
• Installation
• Upgrade options
• Transformer
• Windings 1, 2, and 3
• Onload Tap Changer
• Harmonics
•

FlexCurves

• Voltage Input
• Ambient Temperature
• Analog Input
• Demand Metering
• Analog Outputs
• Logic Inputs 1 to 16
• Virtual Inputs 1 to 16
• Setpoint Group (active group and edit group)
• Differential (percent differential; harmonic, energization, & 5
• Instantaneous Differential
• Phase Overcurrent (time and instantaneous for all windings)
• Neutral Overcurrent (time and instantaneous for all windings)
• Ground Overcurrent (time and instantaneous for all WYE windings)
• Restricted Ground Fault (time and instantaneous for all windings)
• Negative Sequence (time and instantaneous for all windings)
• Frequency (underfrequency, frequency decay, and overfrequency)
th
• Overexcitation (5 harmonic level and volts-per-hertz)
• Harmonics (for all windings)
• Insulation aging
• Analog Input
• Current Demand (for all windings)
• Transformer Overload
• Tap changer failure
• Output Relays
• Trace Memory Triggering
• Virtual Outputs
• Timers
• Output Relays (Forcing)
• Analog Outputs (Forcing)
• Simulation
• Factory Service
745 Transformer Management Relay

5.1 OVERVIEW

5.1.1 SETPOINT GROUPS

th
harmonic inhibits)
5-1
5