GE SR489-P1-HI-A20-E Generator Management Relay
The SR489-P1-HI-A20-E generator management relay is a device manufactured by GE Multilin for generator protection. The equipment has a variety of functions and features, mainly used to monitor and protect the running state of the generator.
The SR489-P1-HI-A20-E is equipped with an enhanced LCD display, which is larger than the basic display, allowing the operator to view and diagnose equipment status. In addition, the device supports vibration monitoring analog inputs as well as bearing thermal protection RTDS, which help to monitor the physical state of the generator in real time
SR489-P1-HI-A20-E Protection device specifications
• 50S – Instantaneous OC (startup)
• 51 – Phase overcurrent
– Voltage Restraint Choice (System
Backup)
• 24 – Overexcitation, Volts/Hz
• 27 – Undervoltage (Curve Choice)
• 59 – Overvoltage (Curve Choice)
• 47 – Voltage phase reversal
• 81U – Underfrequency (2 units)
• 81O – Overfrequency (2 Units)
• Bearing overtemperature, vibration
• Overspeed
• VT Fuse Failure
• Programmable Time Current Curves
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Basic information
◆ 489 series manufactured by GE Multilin
◆ Designed for small and medium-sized generators
Main function
◆ Generator overvoltage protection
◆ Generator overcurrent protection
◆ Generator reverse power protection
◆ Generator lost magnetic protection
Technical parameter
◆ Control voltage: 20 to 60VDC or 20 to 48VAC@ 48-52Hz
◆CT input: 1A phase secondary coil, 5A phase CT secondary coil
◆ Output signal: analog output is 4 to 10 mA, high precision and reliability
Characteristics and advantages
◆ Easy to install and maintain, compact design, space saving
◆ High control power supply support: 90-300 volts DC and 70265 volts AC
◆ Large LCD enhanced display, providing vibration monitoring analog input and bearing thermal protection RTD
Application field
◆ Power system protection, monitoring, automatic management, energy management, etc
◆ Large cement, petroleum, mining, steel, shipbuilding and other industries
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