GE General Electric Relay Protection Device 469/SR469 SR489 Full Series Model Manual

The SR489 series relay/protection device model list of GE brand is mainly used in power systems (such as generator and transformer protection), industrial distribution and other scenarios, to achieve functions such as overcurrent, overvoltage, differential protection, etc. The core parameters are disassembled according to the model coding rules as follows:

1、 Model coding logic (taking SR489-P5-HI-A20-E as an example)

Explanation of the meaning of the encoding segment, optional parameters/function description

SR489 product series name (GE relay protection device) fixed identification, representing that this series is a multifunctional protection relay

P5 protection type/configuration (presumably) may be associated with protection logic (such as P5=generator differential protection, P1=transformer protection, etc., need to be confirmed in conjunction with the manual)

HI/LO voltage level/signal range (speculation) HI=high voltage system adaptation, LO=low voltage/small signal scenario

A20 communication/output module (presumably) represents built-in communication protocols (such as Modbus, IEC 61850) or output interface types

E/H/T extension function (suffix) E=basic configuration/environment adaptation; H=redundancy/high reliability; T=Special environment (such as high temperature, vibration)

2、 Classification of core model functions

1. Generator protection class (typical: SR489-P5-HI-A20-E)

Function: Implement differential protection, overcurrent protection, underexcitation protection, etc. for generators, detect faults such as stator winding short circuits and rotor grounding, quickly cut off circuits to avoid equipment damage.

Application scenarios: Generator control panels for thermal/hydroelectric power plants and industrial self owned power stations.

2. Transformer protection type (typical: 489-P1-HI-A20-T)

Function: Covering transformer differential protection, zero sequence protection, overload protection, identifying faults such as winding short circuit and abnormal oil temperature, and interlocking circuit breaker tripping.

Application scenarios: Transformer protection cabinets for substations and large factory distribution systems.

3. General distribution protection class (typical: SR489-P5-LO-A20-E)

Function: Suitable for low-voltage distribution systems, providing overcurrent, undervoltage, and zero sequence protection, commonly used for overload/short circuit protection of motors and bus ducts.

Application scenarios: Factory workshop power distribution, commercial building electrical systems.

3、 Model differences and selection logic

Comparing dimensions SR489 (with SR prefix) vs 489 (without SR) HI vs LO E vs H vs T

The hardware version SR is an enhanced (supporting intelligent communication, redundancy) HI adapted high voltage system (kV level) E=standard environment

Application voltage 489 as the basic type (commonly used for low voltage/distribution) LO adaptation low voltage system (V level) H=redundancy/high reliability requirements

Environmental adaptation - T=special scenarios such as high temperature/vibration

4、 Typical application cases

Power plant scenario: SR489-P5-HI-A20-E is used for generator protection. When a stator grounding fault is detected, it triggers a trip within 0.1 seconds to avoid unit burnout.

Factory power distribution: 489-P1-LO-A20-E is installed in the workshop power distribution cabinet, which automatically cuts off the circuit when the motor is overloaded, protecting the equipment and reducing production losses.

5、 Summary

The GE SR489 series is the intelligent relay protection core for power/industrial systems, which can quickly identify protection types, voltage adaptation, and function expansion through model coding. Selection should be combined with:

Protection object (generator/transformer/distribution)

System voltage level (high/low voltage)

Environmental requirements (standard/special)

The model list of GE 469/SR469 series relay protection devices covers the protection and control of power systems (generators, transformers, distribution), and some models include commercial labels such as "including tax/excluding tax/quotation inquiry". The following analysis is based on "product features+business attributes":

1、 Model Core Logic (Taking SR469-P5-HI-A20-E as an Example)

Interpretation of the meaning of coding segments and their value in industrial scenarios

SR469/469 product series (intelligent relay protection) SR is an enhanced type (supporting redundancy and intelligent communication), and 469 is a basic type

P5/P1 protection type (P5=generator/P1=transformer, etc., to be confirmed in the manual) accurately adapts to the fault protection requirements of power generation and transformation scenarios

HI/LO voltage levels (HI=high voltage, LO=low voltage) cover the entire scenario from power plants (kV level) to factory distribution (V level)

A20 communication/output module (such as Modbus, relay output) enables remote monitoring and system linkage (such as DCS integration)

E/H/T configuration suffixes (E=standard, H=redundant, T=special environment) meet different reliability and environmental requirements (such as high temperature, vibration)

2、 Business annotation analysis (distinguishing between technical and procurement attributes)

The impact of annotation type meanings on procurement

Whether the price including/excluding tax includes value-added tax directly affects the procurement cost (especially for large orders)

Sales quotation - To inquire, please contact sales for the latest price. The model is customized/niche configuration, and the price is dynamically adjusted

CASE includes a casing/installation kit that can be directly used for cabinet integration, reducing installation costs

3、 Typical Model Function Classification

1. Core model of power generation/substation protection

Typical applications of model function positioning

SR469-P5-HI-A20-E Generator Differential/Overcurrent Protection (Enhanced) Thermal Power Plant Generator Control Panel

469-P1- HI - A20-T Transformer Zero Sequence/Overload Protection (Basic Type) Substation Transformer Protection Cabinet

2. Special configurations/business related models

Model special attribute scenario value

SR469- RELAY 469- P5- HI - A20-E includes relay output module adaptation for old system renovation (direct replacement of contacts)

SR469-P5- HI - A20-E SA 220V adaptation 220V special power supply overseas project/non-standard distribution system

4、 Selection and procurement precautions

Technical matching: Priority should be given to confirming the protected object (generator/transformer/distribution), voltage level (HI/LO), and communication requirements (A20 corresponding protocol), for example:

Power plant generator protection → Select SR469-P5-HI-A20-H (redundant, high reliability)

Factory low-voltage distribution → Select 469-P1-LO-A20-E (basic type, cost-effective)

Business costs: Pay attention to the difference between "including tax/excluding tax" (especially for cross-border procurement), "CASE" labeling can reduce installation costs, and "quotation inquiry" models require proactive communication and negotiation.

Document dependency: As the encoding includes custom configurations (such as "SA 220V" and "RELAY"), precise parameters (protection settings, interface definitions) need to be consulted in the GE official datasheet or contact technical support.