阿尔斯通 LGPG111 Relay 继电器欧美进口

一、产品概述

阿尔斯通LGPG111 Relay继电器是一款多功能数字式发电机综合保护继电器，它将多种发电机保护功能及相关布阵逻辑综合于同一继电器外壳中。该继电器采用数字技术，通过模一数转换电路将模拟量信号转换成数字量数据，并利用强大的微处理器进行数字信号处理和执行各种保护算法。

二、主要功能

LGPG111继电器具有多种独立的发电机保护功能，包括但不限于：

• 发电机差动保护功能（87G）：用于保护相问或三相定子绕组故障。
• 定子接地故障保护功能（51N）：反应电流变化而动作，用于灵敏接地的发电机或装有一个电阻接地的变压器。
• 中性点偏移保护功能（59N）：反应电压变化而动作，用于检测发电机上定子绕组的接地故障。
• 与电压有关的过电流保护功能（51V）：用于系统的后备保护。
• 逆功率（32R）和正向低功率（32L）保护功能：用于检测原动机的损耗。
• 负相序保护功能（46）：用于检测持续的不平衡负载状况。
• 磁场故障保护（40）：反应发电机失磁故障。

此外，该继电器还提供欠压、过压、欠频率、过频率等保护功能，以及电压平衡功能等附加辅助功能。

三、技术特点

• 数字化技术：利用标准化的硬件和软件结构，实现多种保护功能的综合。
• 灵活配置：用户可根据需要选择所希望的保护功能，以适应不同发电机的要求。
• 简化设计：减少继电器之间的布线和辅助部件的总量，降低设计和安装成本。
• 易于维护：简化的维护和调试过程，提高经济效益。

1、 Product Overview

The Alstom LGPG111 Relay is a multifunctional digital generator comprehensive protection relay that integrates multiple generator protection functions and related layout logic into the same relay housing. This relay uses digital technology to convert analog signals into digital data through an analog-to-digital conversion circuit, and utilizes a powerful microprocessor for digital signal processing and execution of various protection algorithms.

2、 Main functions

The LGPG111 relay has multiple independent generator protection functions, including but not limited to:

Generator differential protection function (87G): used to protect against phase or three-phase stator winding faults.

Stator grounding fault protection function (51N): It operates in response to changes in current and is used for sensitive grounding of generators or transformers equipped with a resistor grounding.

Neutral point offset protection function (59N): It operates in response to voltage changes and is used to detect grounding faults in the stator winding of the generator.

Voltage related overcurrent protection function (51V): used for backup protection of the system.

Reverse power (32R) and forward low power (32L) protection functions: used to detect the loss of the prime mover.

Negative phase sequence protection function (46): used to detect continuous unbalanced load conditions.

Magnetic field fault protection (40): Reflecting generator demagnetization fault.

In addition, the relay also provides protection functions such as under voltage, over voltage, under frequency, over frequency, as well as additional auxiliary functions such as voltage balancing.

3、 Technical features

Digital technology: Utilizing standardized hardware and software structures to achieve comprehensive protection functions.

Flexible configuration: Users can choose the desired protection function according to their needs to adapt to the requirements of different generators.

Simplified design: Reduce the total amount of wiring and auxiliary components between relays, and lower design and installation costs.

Easy to maintain: Simplified maintenance and debugging process, improving economic efficiency.

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