GE Multilin 489-P1-HI-A20-E Generator management relay

489-P1-HI-A20-E Product Introduction

The 489-P1-HI-A20-E is a generator management relay manufactured by GE Multilin that is designed for applications that require the management and protection of synchronous and induction generators. Here is a detailed description of the product:

I. Product overview

Model ID: 489-P1-HI-A20-E

Manufacturer: GE Multilin

Application: Suitable for the management and protection of synchronous and induction generators

2.Second, functional characteristics

Comprehensive protection features:

Provides economical protection, measurement, and monitoring functions, including but not limited to differential protection, 100% stator ground protection, ground direction overcurrent protection, negative sequence overcurrent protection, high setting overcurrent protection, low voltage lock-in overcurrent protection, over/under voltage protection, over/under frequency protection, distance protection, and reverse power protection.

Tripping and alarm protection is its main function, including neutral line overvoltage and undervoltage and other types.

Input and display:

Digital inputs: 9 digital inputs, of which 2 are predefined (set point access, circuit breaker status) and 7 are assignable (such as remote reset, test input, hot reset, etc.).

Analog inputs: Four analog inputs in 4-20mA, 0-20mA, or 0-1mA Settings, assigning names, min/Max, and units.

Display type: Enhanced LCD screen provides a clear display interface. However, it should be noted that if the temperature is below 20 degrees Celsius, the LCD contrast may be affected.

Product upgrades and compatibility:

Supports product upgrades via disk /CD/ Internet.

Compatible with GE Multilin's 489 generator management relay family, but with a unique code character identifier.

3. Technical specifications

Frequency range: Suitable for generators at 25, 50 and 60Hz.

Sampling rate: 12 times per cycle.

4. Precautions

While the relay can be used in applications where the temperature drops to negative values, there are concerns about LCD contrast when used at low temperatures.

During the selection and use process, refer to the official documentation and technical support provided by GE Multilin to ensure correct configuration and maintenance.

V. Summary

The 489-P1-HI-A20-E is a full-featured, stable generator management relay for a wide range of generator applications requiring high reliability and protection accuracy. With its rich protection functions and flexible input and output configurations, the safety and stability of the generator can be effectively improved.

5.Physical picture

489-P1-HI-A20-E Technical Specifications

About the 489-P1-HI-A20-E

The Generator Management Relays from GE Multilin are best used in applications in which management and protection of synchronous and induction generators are required. The 489-P1-HI-A20-E model is just one of the models that can be used in these applications. The things that also differentiate this relay from others in the 489 Generator Management Relay series are the different code characters, for example, the P1 code on this relay indicates the phase current input which is one-ampere phase CT secondaries. The E at the end of this model indicates the display type on the front panel which is an enhanced display with a larger LCD screen. The remaining characters and appropriate codes can be found on page five of chapter two in the GEK-10649N 489 Generator Management Relay Instruction Manual. 

Trip and alarm protections are the main protection types available on the 489-P1-HI-A20-E relay. Some of the trip protection features are similar but have slight differences, for example, there are two neutral overvoltage and undervoltage types; one is a standard voltage type while the remaining two are neutral voltage types. The neutral overvoltage is described as fundamental while the neutral undervoltage is described as the third harmonic. 

Three main input types make up the 489-P1-HI-A20-E relay. These three types are analog, voltage, and digital inputs, all of which are vital to the operation of this device and have very specific characteristics. For example, the digital inputs, for which there are nine, can only be used in conjunction with dry contact connections. There is also a transistor output labeled as NPN which can be transferred to the assigned digital inputs as either a tachometer or counter.