Description

GE SR489-P5-LO-A20-E is the standard version of the GE Multilin SR489 series for low-voltage power supply systems,designed specifically for small and medium-sized synchronous generators and induction generators.Its”P5″represents 5 A CT input,”LO”represents low voltage 24-60 V DC or 20-48 V AC power supply,”A20″represents 4-20 mA analog output,and”E”represents enhanced display panel.Combining these functions,SR489-P5-LO-A20-E provides status monitoring,fault protection,and event recording for generator operation,and can be operated through the front panel without the need for external devices.

The module is equipped with 6 relay outputs,4 analog inputs,12 RTD temperature inputs,CT current inputs,and VT voltage inputs to meet insulation or temperature,vibration,and current detection requirements,enhancing monitoring coverage.SR489 adopts a drawer style design,supports hot plugging,and reduces maintenance window time;Cooperate with RS232/RS485/Ethernet communication interface,compatible with Modbus RTU/TCP and DNP 3.0 protocols,to achieve remote monitoring and device integration.

Main features and advantages

High security protection capability:

SR489-P5-LO-A20-E supports various protection functions such as Stator Differential protection,Loss of Excitation,Over/Under Frequency,and Ground/Reverse Power detection.

Advanced state monitoring:

The module provides 4 analog inputs for vibration monitoring and 12 RTD inputs for stator and bearing temperature detection.Combined with thermal model analysis,it can achieve more precise equipment diagnosis.

Clear data recording and diagnosis:

Built in event recorder,16 cycle waveform capture,and time synchronization capability,enabling precise fault location through IRIG-B or internal clock.

Low voltage power supply and analog output:

The”LO”version supports low-voltage system power supply and is more suitable for small unit environments;The”A20″version provides 4-20 mA analog feedback for easy PLC/DCS integration.

Enhance human-computer interaction interface:

Large 40 character LCD and complete keyboard enhance on-site setup and diagnostic convenience without the need for external terminal devices.

Drawer style design is easy to maintain:

The drawer installation structure supports hot swapping,shortens maintenance time,and can predict maintenance,making it suitable for deployment of critical equipment.

Rich protocols and multi system compatibility:

Built in RS232/485/Ethernet,compatible with Modbus RTU/TCP and DNP3.0 communication protocols,supports remote monitoring and intelligent integration.

technical specifications

Product model:SR489-P5-LO-A20-E

Manufacturer:GE Multilin(GE Grid Solutions)

Product type:Generator Management Relay

CT input:P5:5A CT secondary side

Supply voltage:LO:24-60 V DC/20-48 V AC(48-62 Hz)

Analog output:A20:4-20 mA(4 channels)

Display panel:Enhanced LCD(40 characters)

Relay output:6 independent relays

Analog input:4 vibration or process signals

RTD input:12 temperature monitoring channels

Communication interface:RS-232,RS-485(2),Ethernet 10BaseT

Supported protocols:Modbus RTU/TCP,DNP 3.0 Level 2

Waveform sampling:12 times/cycle,up to 16 cycles recorded

Event records:≥40,with timestamp

Time synchronization:internal clock/IRIG-B

Drawer Design:Supports drawer style installation(with CT self short protection)

Operating temperature:-40°C to+60°C

Storage temperature:-40°C to+80°C

Protection level:Complies with UL/IEC drawer style standards

Weight:~10 lbs(approximately 4.5 kg)

Power consumption:maximum 45kVA

application area

SR489-P5-LO-A20-E is widely used in small and medium-sized synchronous/induction generator protection scenarios,suitable for cogeneration,power plant auxiliary generation,and backup generator sets.It provides strong support for equipment fault prediction with comprehensive protection functions such as stator differential,stall/overclocking protection signals,temperature and vibration monitoring inputs,as well as event and waveform recording.

In addition,the 4-20 mA output of the module can monitor key parameters such as excitation voltage and speed,facilitating PLC/DCS integration and achieving intelligent status monitoring and remote operation and maintenance.Drawer style structure and low-voltage power supply are suitable for small systems,reducing maintenance interruption time,especially for commercial buildings,remote areas for power generation,or ship emergency power systems.

Related products

SR489-P1-LO-A20-E:1A CT input version,suitable for low capacity generators.

SR489-P5-HI-A20-E:High voltage power supply version(90-300 V DC/70-265 V AC).

SR489-P5-HI-A20-T:Enhanced display+Ethernet interface version,suitable for network monitoring.

SR489‑P5‑HI‑A20‑E‑H:the heavy-duty anti-corrosion version applicable to the protection of chemical ships.

SR889:GE’s new generation of alternative processing,with stronger performance,it is recommended to upgrade and use.

Installation and maintenance

Preparation before installation:Ensure that the power supply voltage is 24-60 V DC or 20-48 V AC,the grounding is stable,the CT/VT/RTD circuit is connected properly,and the drawer cabinet meets the installation specifications.It is recommended to install without power and verify the CT secondary side and phase sequence.

Maintenance suggestion:It is recommended to run a hot plug test once a year to calibrate CT/RTD inputs and verify analog output accuracy;Use EnerVista or 489PC software to extract event records and waveform data,and analyze abnormal trends.Regularly clean the display panel to ensure that the buttons are sensitive.