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                                                                              • • GE Multilin 489-P1-HI-A20-E Generator Protection & Management Relay

                                                                                  1. Product Overview

                                                                                  • Model: 489-P1-HI-A20-E (SR489 series, GE Vernova Multilin)
                                                                                  • Type: All-in-one generator multifunctional protection, monitoring and control relay for synchronous & induction generators

                                                                                  Model Code Decoding

                                                                                  表格

                                                                                   

                                                                                   

                                                                                   

                                                                                  Code Segment	Definition
                                                                                  489	Core generator management relay platform
                                                                                  P1	Phase CT secondary rated 1A current input
                                                                                  HI	High auxiliary power supply range (70–265 VAC / 90–300 VDC)
                                                                                  A20	Standard front LCD display + full I/O configuration
                                                                                  E	Embedded Ethernet communication port (Modbus TCP)

                                                                                  • Core Purpose: Integrates ANSI/IEC protection elements, electrical parameter measurement, temperature/vibration monitoring, breaker control, synchronization, fault recording and multi-protocol communication for medium & large generator sets (100kW–10MW)

                                                                                  2. Core Electrical Input Specifications

                                                                                  AC Current Inputs (P1 = 1A CT secondary)

                                                                                  • CT secondary rating: 1 A
                                                                                  • Measurement range: 0.02 ~ 20 × CT rated
                                                                                  • Accuracy: ±0.5% below 2× CT; ±1% up to 20× CT
                                                                                  • CT withstand: Continuous 3× rated; 40× rated for 2s; 80× rated for 1s
                                                                                  • Burden: <0.2 VA per phase

                                                                                  AC Voltage Inputs

                                                                                  • Rated measuring range: 0–690 V line-to-line
                                                                                  • Frequency tracking range: 45–65 Hz, accuracy ±0.02 Hz
                                                                                  • Voltage measurement accuracy: ±0.2% FS

                                                                                  Auxiliary Power (HI High Range)

                                                                                  • AC: 70–265 VAC, 48–62 Hz
                                                                                  • DC: 90–300 VDC
                                                                                  • Typical consumption: 25 VA; max 45 VA
                                                                                  • Hold-up time: ≥30 ms during power dip

                                                                                  3. Built-in Multi-type I/O Resources

                                                                                  Temperature Monitoring

                                                                                  • 12 RTD channels (Pt100 standard) for stator winding, bearing temperature
                                                                                  • Two-out-of-two voting logic to avoid false overtemperature trips

                                                                                  Vibration Analog Inputs

                                                                                  • 4 programmable analog inputs: 0–1mA / 0–20mA / 4–20mA for vibration transducers

                                                                                  Control Analog Outputs

                                                                                  • 4 isolated 4–20mA analog outputs to transmit power, temperature, frequency to PLC/DCS

                                                                                  Digital Inputs

                                                                                  • 8 DI channels: Breaker status, tachometer, remote start/stop, trip reset, waveform capture trigger

                                                                                  Relay Output Contacts

                                                                                  • Multiple Form C trip/alarm relays, rated 5 A @ 250 VAC / 5 A @ 30 VDC
                                                                                  • Trip coil supervision with 2–5 mA trickle current detection for circuit break failure monitoring

                                                                                  4. Comprehensive Generator Protection Functions (ANSI Standard)

                                                                                  1. Overcurrent / Short-circuit protection (50/51)
                                                                                  2. Negative sequence overcurrent (46) – prevents rotor overheating from unbalanced loads
                                                                                  3. Ground fault / neutral overcurrent protection (51N/64G)
                                                                                  4. Overvoltage (59), Undervoltage (27)
                                                                                  5. Overfrequency (81O), Underfrequency (81U)
                                                                                  6. Reverse power / motoring protection (32) – critical for grid-parallel generators
                                                                                  7. Loss of excitation (40)
                                                                                  8. Stator thermal overload (49, RTD-based)
                                                                                  9. Vibration high alarm/trip
                                                                                  10. Breaker failure supervision
                                                                                  11. Quasi-synchronization check for grid parallel connection

                                                                                  5. Communication Interfaces

                                                                                  1. Embedded RJ45 Ethernet (E suffix feature): Modbus TCP, DNP3.0 Level 2
                                                                                  2. Rear-panel isolated RS485: Modbus RTU, DNP3
                                                                                  3. Front-panel RS232: Local laptop commissioning, waveform capture download
                                                                                  • Baud rate options: 300 ~ 115200 bps; parity configurable (None/Odd/Even)

                                                                                  6. Data Recording & Diagnostic Functions

                                                                                  • Oscillographic fault waveform capture (pre/post fault data storage)
                                                                                  • Event sequence recorder (SOE) with millisecond time stamp
                                                                                  • Accumulated power demand, runtime statistics, fault counter
                                                                                  • Front LCD + keypad: Local real-time value viewing, setpoint modification, fault history query
                                                                                  • Password access security for parameter modification

                                                                                  7. Mechanical & Environmental Ratings

                                                                                  • Mounting: Standard 19-inch rack or panel flush mount
                                                                                  • Front panel protection: IP40; rear terminal area IP10
                                                                                  • Operating temperature: -40°C ~ +60°C
                                                                                  • Storage temperature: -40°C ~ +85°C
                                                                                  • Humidity: 5%–95% RH non-condensing
                                                                                  • Dielectric withstand: 1.9 kV AC 1s / 1.6 kV AC 1min (UL 508 compliant)
                                                                                  • Shipping weight: 7.7 kg (17 lbs)

                                                                                  8. Key Advantages

                                                                                  1. All-in-one integrated design: Eliminates separate voltage, current, temperature protection relays
                                                                                  2. High-range HI power supply adapts to unstable industrial DC/AC auxiliary power
                                                                                  3. Built-in Ethernet simplifies connection to SCADA, DCS and remote monitoring systems
                                                                                  4. Dual redundant temperature voting logic improves protection reliability
                                                                                  5. Full fault waveform recording simplifies post-failure root cause analysis
                                                                                  6. Supports automatic quasi-synchronization and active/reactive power load sharing for parallel gensets
                                                                                  7. Wide ambient temperature range suitable for power plants, oil & gas, industrial backup power stations

                                                                                  9. Typical Application Scenarios

                                                                                  • Steam turbine, gas turbine synchronous generator protection in thermal power plants
                                                                                  • Industrial diesel/gas backup generator sets (grid-parallel or island mode)
                                                                                  • Cogeneration combined heat & power (CHP) generator systems
                                                                                  • Oil & gas onshore/offshore generator power units
                                                                                  • Renewable distributed generation small synchronous generators
                                                                                  • Mining, metallurgy large industrial self-owned power station gensets

The structure and details of the product：