3 generator parameters, 4 serial start/stop initiation, Generator parameters -13 – GE 489 User Manual

Page 63: Serial start/stop initiation -13

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GE Multilin

489 Generator Management Relay

4-13

4 SETPOINTS

4.3 S2 SYSTEM SETUP

4.3.3 GENERATOR PARAMETERS

PATH: SETPOINTS

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S2 SYSTEM SETUP

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GENERATOR PARAMETERS

As a safeguard, when a unit is received from the factory, the

PHASE CT PRIMARY

and Generator Parameters setpoints will be

defaulted to "--------", indicating they are not programmed. The 489 indicates that it was never programmed. Once these
values are entered, the 489 will be in service. All elements associated with power quantities are programmed in per unit
values calculated from the rated MVA and power factor. The generator full load amps (FLA) is calculated as

(EQ 4.2)

All voltage protection features that require a level setpoint are programmed in per unit of the rated generator phase-phase
voltage.The nominal system frequency must be entered here. This setpoint allows the 489 to determine the internal sam-
pling rate for maximum accuracy. If the sequence of phase rotation for a given system is ACB rather than the standard
ABC, the system phase sequence setpoint may be used to accommodate this rotation. This setpoint allows the 489 to prop-
erly calculate phase reversal and negative sequence quantities.

4.3.4 SERIAL START/STOP INITIATION

PATH: SETPOINTS

ÖØ

S2 SYSTEM SETUP

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SERIAL START/STOP

If enabled, this feature will allow the user to initiate a generator startup or shutdown via the RS232/RS485 communication
ports. Refer to the Communications chapter for command formats. When a startup command is issued, the auxiliary
relay(s) assigned for starting control will be activated for 1 second to initiate startup. When a stop command is issued, the
assigned relay(s) will be activated for 1 second to initiate a shutdown.

GEN. PARAMETERS
[ENTER] for more

GENERATOR RATED

MVA: ----------------

Range: 0.050 to 2000.000 MVA