Current and Voltage Inputs The 469 has two sets of three phase CT inputs, one for phase current, and one dedicated for differential protection. The ratings of the phase current inputs (1A and 5A) must be specified when ordering the relay, while the ratings for differential inputs are field programmable, supporting both 1A and 5A secondary currents. There are also 2 single-phase ground CT inputs: A standard input with settable secondary rating; 5A or 1A, and a high sensitivity ground current detection input for high resistance grounded systems. Three phase VT inputs support delta and wye configuration and provide voltage signals for all voltage, frequency and power based protection elements and metering.
Digital Inputs The 469 has 5 predefined inputs: • Starter Status • Emergency Restart • Remote Reset • Setpoint Access n Test SwitchThe 469 also has four assignable digital inputs, which can be configured as the following functions: 401 469 Motor Protection System Motor Protection www.GEDigitalEnergy.com • Remote Trip and Alarm • Speed Switch Trip and Tachometer • Vibration Switch Trip and Alarm • Pressure Switch Trip and Alarm • Load Shed Trip • Universal Digital Counter • External oscillography trigger and External Relay Fault Simulation initiation • General Switch with programmable functions and outputs