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GE Power Management 469 Motor Management Relay 1-3

1 INTRODUCTION 1.1 OVERVIEW

Fault diagnostics are provided through pretrip data, event record, trace memory, and statistics. Prior to issuing

a trip, the 469 takes a snapshot of the measured parameters and stores them with the cause of the trip. This

pre-trip data may be viewed using the key before the trip is reset, or by accessing the

A1 STATUS /

LAST TRIP DATA

actual values. The 469 event recorder stores up to 40 time and date stamped events including

the pre-trip data. Each time a trip occurs, the 469 stores a trace of 8 cycles pre-trip and 8 cycles post-trip for all

measured AC quantities. Trip counters record the number of occurrences of each type of trip. Minimum and

maximum values for RTDs and analog inputs are also recorded. These features enable the operator to pinpoint

a problem quickly and with certainty.

Power metering is built into the 469 as a standard feature. The table below outlines the metered parameters

available either through the front panel or communications ports.

The 469 is equipped with 3 fully functional and independent communications ports. The front panel RS232 port

may be used for 469 setpoint programming, local interrogation or control, and upgrading of 469 firmware. The

Computer RS485 port may be connected to a PLC, DCS, or PC based user interface program. The Auxiliary

RS485 port may be used for redundancy or simultaneous interrogation and/or control from a second PLC,

DCS, or PC software.

There are also four 4 to 20 mA or 0 to 1 mA (as specified with order) transducer outputs that may be assigned

to any measured parameter. The range of these outputs is scalable.

Additional features are outlined in the table below.

Table 1–1: METERING AND ADDITIONAL FEATURES

METERING ADDITIONAL FEATURES

Voltage Drawout case (for ease of maintenance/testing)

Current and amps demand Reduced voltage starting control for single transition

Real power, kW demand, kW power consumption Trip coil supervision

Apparent power and kVA demand Flash memory for easy firmware updates

Reactive power, kvar demand, kvar consumption/

generation

Frequency

Power Factor

RTD

Speed in RPM with a key phasor input

User-programmable analog inputs

GE 469 Manual

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