Ge 489 User Manual download pdf (Page 15)

GE Multilin 489 Generator Management Relay 1-7

1 INTRODUCTION 1.2 SPECIFICATIONS

Elements: Trip and Alarm

OVERFREQUENCY

Required Voltage: 0.50 to 0.99 × rated voltage in Phase A

Block From Online: 0 to 5 sec. in steps of 1

Pick- up Level: 25.01 to 70.00 in steps of 0.01

Curve Shapes: 1 level alarm, 2 level trip definite time

Time Delay: 0.1 to 5000.0 s in steps of 0.1

Pickup Accuracy: ±0.02 Hz

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

Elements: Trip and Alarm

NEUTRAL OVERVOLTAGE (FUNDAMENTAL)

Pick-up Level: 2.0 to 100.0 V secondary in steps of 0.01

Time Delay: 0.1 to 120.0 s in steps of 0.1

Pickup Accuracy: as per Neutral Voltage Input

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

Elements: Trip and Alarm

NEUTRAL UNDERVOLTAGE (3RD HARMONIC)

Blocking Signals: Low power and low voltage if open delta

Pick-up Level: 0.5 to 20.0 V secondary in steps of 0.01

if open delta VT; adaptive if wye VT

Time Delay: 5 to 120 s in steps of 1

Pickup Accuracy: as per Neutral Voltage Input

Timing Accuracy: ±3.0 s

Elements: Trip and Alarm

LOSS OF EXCITATION (IMPEDANCE)

Pickup Level: 2.5 to 300.0 Ω secondary in steps of 0.1

with adjustable impedance offset 1.0 to

300.0 Ω secondary in steps of 0.1

Time Delay: 0.1 to 10.0 s in steps of 0.1

Pickup Accuracy: as per Voltage and Phase Current Inputs

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

Elements: Trip (2 zones using impedance circles)

DISTANCE (IMPEDANCE)

Pickup Levels: 0.1 to 500.0 Ω secondary in steps of 0.1

50 to 85° reach in steps of 1

Time Delay: 0.0 to 150.0 s in steps of 0.1

Pickup Accuracy: as per Voltage and Phase Current Inputs

Timing Accuracy: 150 ms ±50 ms or ±0.5% of total time

Elements: Trip (two trip zones)

REACTIVE POWER

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

Pick- up Level: 0.02 to 1.50 × rated Mvar

(positive and negative)

Time Delay: 0.2 to 120.0 s in steps of 0.1

Pickup Accuracy: see power metering

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

Elements: Trip and Alarm

REVERSE POWER

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

Pick- up Level: 0.02 to 0.99 × rated MW

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 and Alarm

LOW FORWARD POWER

Block From Online: 0 to 15000 s in steps of 1

Pick- up Level: 0.02 to 0.99 × rated MW

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 and Alarm

PULSE OUTPUT

Parameters: + kwh, +kvarh, -kvarh

Interval: 1 to 50000 in steps of 1

Pulse Width: 200 to 1000 ms in steps of 1 ms

RTDS 1 TO 12

Pickup: 1 to 250°C in steps of 1

Pickup Hysteresis: 2°C

Time Delay: 3 sec.

Elements: Trip and Alarm

OVERLOAD / STALL PROTECTION / THERMAL MODEL

Overload Curves: 15 Standard Overload Curves

Custom Curve

Voltage Dependent Custom Curve

(all curves time out against average

phase current)

Curve Biasing: Phase Unbalance

Hot/Cold Curve Ratio

Stator RTD

Online Cooling Rate

Offline Cooling Rate

Line Voltage

Overload Pickup: 1.01 to 1.25

Pickup Accuracy: as per Phase Current Inputs

Timing Accuracy: ±100 ms or ±2% of total time

Elements: Trip and Alarm

OTHER FEATURES

Serial Start/Stop Initiation

Remote Reset (Configurable Digital Input)

Test Input (Configurable Digital Input)

Thermal Reset (Configurable Digital Input)

Dual Setpoints

Pre-Trip Data

Event Recorder

Waveform Memory

Fault Simulation

VT Failure

Trip Counter

Breaker Failure

Trip Coil Monitor

Generator Running Hours Alarm

IRIG-B Failure Alarm

ENVIRONMENTAL

Ambient Operating Temperature: –40°C to +60°C

Ambient Storage Temperature: 40°C to +80°C.

Humidity: Up to 90%, noncondensing.

Altitude: Up to 2000 m

Pollution Degree: 2

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Ge 489 User Manual Page 15

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