GE MOTOR MANAGEMENT RELAY 469 Instruction Manual page 15

1 INTRODUCTION
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
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
Voltage
Current and amps demand
Real power, kW demand, kW power consumption
Apparent power and kVA demand
Reactive power, kvar demand, kvar consumption/
generation
Frequency
Power Factor
RTD
Speed in RPM with a key phasor input
User-programmable analog inputs
GE Power Management
NEXT key before the trip is reset, or by accessing the A1 STATUS /
ADDITIONAL FEATURES
Drawout case (for ease of maintenance/testing)
Reduced voltage starting control for single transition
Trip coil supervision
Flash memory for easy firmware updates
469 Motor Management Relay
1.1 OVERVIEW
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