Ge 489 User Manual download pdf (Page 13)

GE Multilin 489 Generator Management Relay 1-5

1 INTRODUCTION 1.2 SPECIFICATIONS

RS485 Baud Rates: 300, 1200, 2400, 4800, 9600, 19200

RS232 Baud Rate: 9600

Parity: None, Odd, Even

Protocol: Modbus

RTU / half duplex, DNP 3.0

ANALOG CURRENT OUTPUT

Type: Active

Range: 4 to 20mA, 0 to 1 mA

(must be specified with order)

Accuracy: ±1% of full scale

4 to 20 mA max. load: 1.2 kΩ

0 to 1mA max. load: 10 kΩ

Isolation: 36 Vpk

(isolated with RTDs and analog inputs)

4 Assignable Outputs: Phase A, B, C output current

3 phase average current

negative sequence current

generator load

hottest stator RTD

hottest bearing RTD

RTD # 1 to 12

AB voltage

BC voltage

CA voltage

average phase-phase voltage

volts/hertz

frequency

3rd harmonic neutral voltage

power factor

3 phase reactive power (Mvar)

3 phase real power (MW)

3 phase apparent power (MVA)

analog inputs 1 to 4

tachometer

thermal capacity used

I, Mvar, MW, MVA demands

Torque

OUTPUT RELAYS

Relay contacts must be considered unsafe to touch

when the 489 is energized! If the output relay con-

tacts are required for low voltage accessible applica-

tions, it is the customer's responsibility to ensure

proper insulation levels.

Configuration: 6 electromechanical Form C relays

Contact Material: silver alloy

Operate Time: 10 ms

Max Ratings for 100000 operations:

TERMINALS

Low Voltage (A, B, C, D terminals): 12 AWG max

High Voltage (E, F, G, H terminals): #8 ring lug,

10 AWG wire standard

POWER METERING

Range: 0.000 to 2000.000 ±Mw, ±Mvar, MVA

Accuracy

at Iavg < 2 × CT:

±1% of × 2 × CT × VT × VT full-scale

at Iavg > 2 × CT: ±1.5% of × 20 × CT × VT × VT full-scl.

WATTHOUR AND VARHOUR METERING

Description: Continuous total of +watthours and

±varhours

Range: 0.000 to 4000000.000 MvarHours

Timing Accuracy: ±0.5%

Update Rate: 50 ms

DEMAND METERING

Metered Values: Maximum Phase Current

3 Phase Real Power

3 Phase Apparent Power

3 Phase Reactive Power

Measurement Type: Rolling Demand

Demand Interval: 5 to 90 minutes in steps of 1

Update Rate: 1 minute

Elements: Alarm

GENERAL INPUT A TO G (DIGITAL INPUT)

Configurable: Assignable Digital Inputs 1 to 7

Time Delay: 0.1 to 5000.0 s in steps of 0.1

Block From Online: 0 to 5000 s in steps of 1

Timing Accuracy: ±100 ms or ±0.5% of total time

Elements: Trip, Alarm, and Control

SEQUENTIAL TRIP (DIGITAL INPUT)

Configurable: Assignable to Digital Inputs 1 to 7

Pickup Level: 0.02 to 0.99 × rated MW in steps of 0.01

Low Forward Power / Reverse Power

Time Delay: 0.2 to 120.0 s in steps of 0.1

Pickup Accuracy: see power metering

Timing Accuracy: ±100 ms or ±0.5% of total time

Elements: Trip

FIELD BREAKER DISCREPANCY (DIGITAL INPUT)

Configurable: Assignable to Digital Inputs 1 to 7

Time Delay: 0.1 to 500.0 s in steps of 0.1

Timing Accuracy: ±100 ms or ±0.5% of total time

Elements: Trip

TACHOMETER (DIGITAL INPUT)

Configurable: Assignable to Digital Inputs 4 to 7

RPM Measurement: 100 to 7200 RPM

Duty Cycle of Pulse: >10%

Pickup Level: 101 to 175 × rated speed in steps of 1

Time Delay: 1 to 250 s in steps of 1

VOLTAGE MAKE/CARRY BREAK MAX.

LOAD

CTS 0.2 s

RESISTIVE

30 V 10 A 30 A 10 A 300 W

125 V 10 A 30 A 0.5 A 62.5 W

250 V 10 A 30 A 0.3 A 75 W

INDUCTIVE

L/R = 40 ms

30 V 10 A 30 A 5 A 150 W

125 V 10 A 30 A 0.25 A 31.3 W

250 V 10 A 30 A 0.15 A 37.5 W

RESISTIVE

120 V 10 A 30 A 10 A 2770 VA

250 V 10 A 30 A 10 A 2770 VA

WARNING

INDUCTIVE

PF = 0.4

120 V 10 A 30 A 4 A 480 VA

250 V 10 A 30 A 3 A 750 VA

VOLTAGE MAKE/CARRY BREAK MAX.

LOAD

CTS 0.2 s

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Ge 489 User Manual Page 13

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