Siemens 7UT86 Transformer

Siemens 7UT86 Transformer

1.产 品 资 料 介 绍：

中文资料：

Siemens 7UT86 是一款变压器保护继电器，主要用于电力系统中的变压器、电抗器和长线路的保护。它基于数字继电器技术，能够提供高精度的差动保护、过流保护和其他附加功能，以确保变压器的安全运行。

主要功能特点

• 差动保护（87T）：利用变压器两侧电流的比较来检测内部故障，具有高灵敏度和快速动作特性。
• 过流保护（50/51）：检测短路和过载情况，防止设备损坏。
• 励磁涌流抑制：可区分正常励磁涌流和实际故障电流，避免误动作。
• 零序保护（87N, 50N/51N）：用于检测接地故障，提高系统安全性。
• 过负荷保护（49）：监测变压器负荷，防止过热损坏。
• 远程通信与监测：支持多种通信协议（如 IEC 61850），可与 SCADA 或 DCS 系统集成，实现远程监控。

应用领域

• 高压/超高压变电站：为大型电力变压器提供全面保护，防止内部短路、绕组故障等问题。
• 工业电网：用于钢铁、化工、石油等行业的大型变电系统，确保电力设备的稳定运行。
• 可再生能源：在风电、光伏等新能源场景中，对升压变压器提供保护，确保电能输送可靠性。

Siemens 7UT86 以其高精度保护功能和强大的通信能力，被广泛应用于现代电力系统和工业配电系统中。

英文资料：

Siemens 7UT86 is a transformer protection relay mainly used for the protection of transformers, reactors, and long lines in power systems. It is based on digital relay technology and can provide high-precision differential protection, overcurrent protection, and other additional functions to ensure the safe operation of transformers.

Main functional features

Differential protection (87T): uses the comparison of current on both sides of the transformer to detect internal faults, with high sensitivity and fast action characteristics.

Overcurrent protection (50/51): detects short circuits and overloads to prevent equipment damage.

Excitation inrush current suppression: It can distinguish between normal excitation inrush current and actual fault current to avoid misoperation.

Zero sequence protection (87N, 50N/51N): used to detect grounding faults and improve system safety.

Overload protection (49): Monitor transformer load to prevent overheating and damage.

Remote communication and monitoring: Supports multiple communication protocols (such as IEC 61850), can be integrated with SCADA or DCS systems, and achieve remote monitoring.

application area 

High voltage/ultra-high voltage substation: provides comprehensive protection for large power transformers to prevent internal short circuits, winding failures, and other issues.

Industrial power grid: a large-scale substation system used in industries such as steel, chemical, and petroleum to ensure the stable operation of power equipment.

Renewable energy: In new energy scenarios such as wind power and photovoltaics, protection is provided for step-up transformers to ensure reliable power transmission.

Siemens 7UT86 is widely used in modern power systems and industrial distribution systems due to its high-precision protection function and powerful communication capabilities.

2.产      品      展      示      

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