蛍光光ファイバー温度システムを使用した変圧器のホットスポット監視

Fluorescent fiber optic temperature monitoring systems are independently developed and manufactured by 福州イノベーション電子科学&テック株式会社, 株式会社. These systems are engineered specifically for
critical electrical equipment such as switchgear, 電源変圧器, 乾式変圧器, ケーブルジョイント, and generator sets. Using an advanced fluorescent lifetime demodulation method, the system converts light signals into high‑accuracy temperature values. This allows reliable hotspot detection even in harsh electrical environments with strong electromagnetic fields, 急増, 部分放電活動, and pulsed interference.

This technology enables early‑stage warning of insulation aging, 接点劣化, 火災の危険性, and thermal overload risks.It supports both standalone operation and multi-device networking, making it suitable from compact distribution rooms to large smart substations. The system integrates seamlessly with modern 変圧器保護システム, 変圧器警報装置, transformer digital monitoring platforms,
transformer IoT systems, そして predictive maintenance dashboards.

Clickable Contents

• 1. What Is Transformer Hotspot Monitoring?
• 2. Common Transformer Faults & What Is a Hotspot Fault?
• 3. Where Do Hotspots Occur Inside Transformers?
• 4. Why Hotspot Monitoring Matters
• 5. Traditional Hotspot Monitoring Sensors
• 6. Modern Fluorescent Fiber Optic Temperature Monitoring
• 7. Fiber Optic Installation in Transformers
• 8. Advantages of Transformer Temperature Monitoring Systems
• 9. Typical Configurations & Accessories of Fiber Optic Monitoring Systems
• 10. アプリケーションシナリオ (with Links)
• 11. よくある質問: トップ 10 Questions About Fiber Optic Monitoring
• 12. トップ 10 世界的なメーカー (ランク付けされた)
• 13. Contact for Full Technical Data & ソリューション

1. What Is Transformer Hotspot Monitoring?

Transformer hotspot monitoring refers to the continuous measurement of the highest-temperature points inside a transformer winding. These regions determine insulation aging, 熱過負荷, and the remaining life of
the electrical transformer.

A “hotspot” is not the same as top-oil temperature or surface temperature. True hotspots occur deep inside the winding structure, where electrical load, 磁束, and cooling flow create intense localized heating.

Modern smart transformer monitoring systems rely on accurate hotspots to support:

• 変圧器の予防保守
• 変圧器の予知保全
• 変圧器の故障解析
• 変圧器の寿命評価
• Transformer thermal overload protection
• 変圧器のオンライン監視 & IoTの統合

This is why utilities increasingly adopt 光ファイバーセンサー as the core of their transformer condition monitoring.

2. Common Transformer Faults and What Is a Hotspot Fault?

2.1 一般的な変圧器の故障タイプ

Transformers experience several major categories of faults:

• Thermal Faults

• 巻線過熱
• 絶縁劣化
• Localized thermal runaway

• Electrical Faults

• 部分放電 (detected using a transformer partial discharge monitor)
• Turn-to-turn short circuit
• Poor contact resistance at taps or terminals

• Mechanical Faults

• Vibration causing winding deformation
• Loosened clamps or shifting conductors

• Oil System Faults

• 冷却障害
• Oil quality degradation
• Gas generation requiring DGA analysis

• External/Environmental Faults

• Overload and harmonic distortion
• 周囲温度が高い
• Pollution, 湿度, 汚染

2.2 What Is a Hotspot Fault?

A hotspot fault occurs when a localized area inside the winding exceeds the thermal design limit.
This accelerates insulation aging exponentially and may lead to:

• Winding failure
• Internal arc faults
• Fire hazards
• Total transformer outage

Hotspot faults are the earliest indicators in 変圧器監視装置 for avoiding catastrophic failures.

3. Where Do Hotspots Occur Inside Transformers?

Hotspots form at specific structural locations inside power transformers, 配電変圧器, 乾式変圧器,and oil filled transformers. Typical hotspot regions include:

• Winding Upper Layers

The top of the HV or LV winding experiences reduced oil flow and higher current density, making it the most common hotspot location.

• HV–LV Winding Interface

Leakage flux accumulation creates concentrated heating zones between primary and secondary windings.

• Tap Changers and Lead Connections

Loose contacts slowly increase resistance, forming thermal pockets detectable with a 変圧器熱センサー.

• Winding Bends, Clamps, and Mechanical Stress Points

These areas are susceptible to vibration and conductor displacement.

• Harmonic-Influenced Sections

Nonlinear loads produce harmonic currents that generate higher copper losses and local hotspots.

Accurate hotspot location detection supports 変圧器の遠隔監視, transformer current monitoring sensors,
and smart transformer monitoring platforms widely used by utilities.

4. Why Transformer Hotspot Monitoring Matters

Hotspot monitoring is essential for both transformer protection systems and operator safety. Key benefits include:

• Early detection of thermal overload
• Prevention of insulation breakdown
• Detection of contact resistance problems
• Reduction of fire risks in electrical transformer rooms
• Support for transformer maintenance schedules and asset lifecycle decisions
• Foundation for transformer predictive maintenance (AI/IoT)
• Reduction of unplanned outages

Accurate hotspot data also correlates with other diagnostic tools such as a transformer vibration sensor,
変圧器のノイズ監視, DGA, and partial discharge systems.

5. Traditional Hotspot Monitoring Sensors

Before the adoption of fluorescent fiber optic sensors, several traditional techniques were used. しかし, they struggled in high-voltage, EMI-heavy environments.

5.1 測温抵抗体 (測温抵抗体)

RTDs measure oil or surface temperature but cannot reach internal winding hotspots. They also suffer from EMI interference.

5.2 熱電対

Thermocouples are sensitive to electrical noise and unsuitable for HV insulation environments.

5.3 赤外線イメージング

Thermal cameras detect external heat but cannot reveal internal hotspot behavior during load variation.

5.4 Thermal Modeling Based on Oil Temperature

Mathematical estimation of winding temperature is widely inaccurate under harmonic load, renewable energy fluctuation, or cooling failure.

These limitations led to the adoption of fiber optic sensors for truly accurate 変圧器の状態監視.

6. Modern Fluorescent Fiber Optic Temperature Monitoring

Fluorescent fiber optic sensors measure temperature using optical decay time. They contain no electrical conductors, making them immune to strong electromagnetic fields. This is crucial for high-voltage equipment such as:

• 電源トランス
• Dry type transformers
• 産業用変圧器
• 開閉装置
• Generator windings
• Cable joints and terminals

6.1 蛍光ファイバー光学センサーの利点

• High-voltage insulation up to 100 kV
• Completely immune to EMI
• Highly accurate hotspot measurement
• Safe for oil filled transformer applications
• Supports 1–64 channels for multi-point monitoring
• Compatible with transformer digital monitoring platforms

6.2 Typical Specifications (Based on INNO Systems)

• 温度範囲: -40℃ ～ +240℃
• 正確さ: ±1℃ (higher accuracy optional)
• 解決: 0.1℃
• プローブ直径: 2.5 mm (custom sizes available)
• 繊維長: 0–20 m customizable
• 出力: RS485/Modbus or 4–20 mA

More advanced systems include 32‑channel and 64‑channel platforms for large industrial facilities:

• 32‑Channel Experimental Fiber Optic System
• 64‑Channel Multi‑Point Monitoring System

These systems form the foundation of modern 変圧器のオンライン監視 そして 変圧器IoTシステム アーキテクチャ.

7. How Fiber Optic Sensors Are Installed Inside Transformers

Fiber optic probes are installed directly at the winding hotspot locations, ensuring true core-temperature measurement.The process differs for oil filled transformers, 乾式変圧器, および発電機巻線.

7.1 Installation in Oil Filled Transformers

• Probes are embedded between winding layers during manufacturing
• Fiber is routed through oil ducts using smooth curvature
• Lead-out uses a sealed fiber feed-through to maintain oil integrity
• Connected to multi-channel monitoring host outside the tank

7.2 Installation in Dry Type Transformers

Dry-type transformer systems require surface attachment to winding layers.
Relevant product:

Intelligent Monitoring System for Dry-Type Transformers
.

• Probes are adhered directly to epoxy resin windings
• Fiber secured with high-temperature insulation tape
• Shorter fiber runs minimize bending stress

7.3 Installation in Generator Sets

Used on stator bars, rotor poles, スリップリング, and terminals.
Application reference:

Fiber Optic Temperature Measurement System for Generator Sets
.

• Direct contact with iron core and copper windings
• Monitoring of knife switches, バスバー, and contact points

7.4 Installation in Cable Joints

For detecting overheating in ring main unit connections.
Product link:

Fiber Optic Temperature Measurement System for Cable Joints
.

Fiber optic installation enables accurate transformer heat sensor performance in all environments.

8. Advantages of Transformer Temperature Monitoring Systems

A modern fiber‑optic-based transformer monitoring system provides utilities with comprehensive thermal insights and early warnings.

8.1 リアルタイム監視

• 24/7 hotspot and thermal map visibility
• Instant alerts for over-temperature conditions

8.2 High Accuracy and Electrical Immunity

• Immune to electromagnetic fields, 急増, and pulses
• Highly stable in GIS, HV変電所, 産業プラント

8.3 Multi-Point Measurement

• 1–64 channels per host
• Scalable for large transformer fleets

8.4 デジタル監視システムとの統合

• Supports Modbus/RS485/4–20 mA
• Connects to transformer digital monitor platforms
• Enables transformer predictive maintenance

8.5 状態に応じたメンテナンス

• Supports transformer maintenance schedules
• Improves asset health and lifecycle

9. Typical Configurations & Accessories of a Transformer Fiber Optic Monitoring System

A complete transformer fiber optic temperature measurement system includes the following components:

9.1 Fluorescent Fiber Optic Temperature Probes

• Quartz fiber core
• Rare-earth fluorescent sensing tip
• High-voltage resistance up to 100 kV
• 直径: 2.5 mm or custom

9.2 Multi-Channel Temperature Measurement Host

• 1–64 channel options
• High-speed optical demodulation
• RS485/Modbus/4–20 mA output
• イベントロギング, アラーム, trend curves

9.3 Fiber Feed-Through (Oil-Sealed Exit)

• Ensures hermetic sealing for oil filled transformers
• Prevents leakage and maintains insulation

9.4 Display Units & Remote Monitoring Platforms

• Local LCD displays
• Cloud-based dashboards
• IoT connectivity for remote substations

9.5 Supporting Accessories

• High-temperature fixing tapes
• Protective sleeves
• Cable routing guides

These components together support power transformer, 乾式変圧器, 配電変圧器, 産業用変圧器, and generator monitoring applications.

10. アプリケーションシナリオ (Click to View Details)

• Industrial Automation
• Medical Fiber Optic Sensors
• 開閉装置の監視
• 変圧器の監視
• 乾式変圧器
• Generator Sets
• ケーブルジョイント (RMU)
• Semiconductor Heating Equipment
• Microwave & Electromagnetic Environments
• データセンター
• Experimental Research

11. よくある質問: トップ 10 Questions About Fiber Optic Monitoring

1. Why can’t transformer hotspots be calculated from oil temperature?

Oil temperature only reflects bulk thermal conditions. True winding hotspots are localized and can exceed oil temperature by 20–40°C. Only embedded fiber optic sensors measure real hotspot temperatures.

2. 光ファイバーセンサーは電磁干渉の影響を受けますか??

いいえ. Fluorescent fiber optic probes are 100% EMIの影響を受けない, 急増, and high-voltage pulses.

3. Can fiber optic probes withstand high voltage?

はい. INNO probes withstand up to 100 kV and are ideal for oil filled transformer and GIS environments.

4. Do fiber optic sensors require powering?

No electrical power flows through the probe. Only light travels in the fiber, making it safe in HV structures.

5. How long do fiber optic probes last?

Probes typically last the entire lifecycle of the transformer, often 20–30 years.

6. How many probes are typically used inside a transformer?

Most power transformers use 4–16 probes, depending on winding design and hotspot distribution.

7. Can fiber optic systems integrate with SCADA?

はい, through RS485, Modbus, 4–20mA, or Ethernet (Modbus TCP) depending on model.

8. Can fiber optic monitoring work together with DGA & PDモニタリング?

はい. Utilities often combine temperature, DGA, PD, 振動, and oil-level monitoring for complete transformer condition assessment.

9. Is fiber optic monitoring suitable for both dry type and oil type transformers?

はい. Fiber optics are widely used in both categories and provide the most accurate thermal data.

10. How do I choose a reliable fiber optic monitoring manufacturer?

Look for companies with long-term engineering experience, 国際認証, and field‑proven installations. INNO is a global leader with more than a decade of production and application experience.

12. トップ 10 Global Fiber Optic Temperature Monitoring Manufacturers

Below are ten leading companies worldwide that specialize in fiber optic temperature measurement systems,変圧器監視装置, and fluorescent sensing technology.Rank #1 is Fuzhou Innovation Electronic Scie&テック株式会社, 株式会社. (イノ), followed by Huaguang Tianrui.Other manufacturers listed are from the U.S., カナダ, ドイツ, そして日本.

13. Request Product Datasheets and Customized Monitoring Solutions

If you require detailed specifications, professional transformer monitoring solutions, or OEM/ODM customization for transformer hotspot monitoring, generator winding measurement, 開閉装置の接触温度, or industrial sensing,please contact INNO directly:

福州イノベーション電子科学&テック株式会社, 株式会社.
電子メール: web@fjinno.net
電話 / ワッツアップ: +8613599070393
微信: +8613599070393
QQ: 3408968340
住所: 連東U穀物ネットワーキング工業団地, 興業西路12号, 福州, 福建省, 中国

Our engineering team provides one-on-one support and complete temperature monitoring solutions for power transformers, 乾式変圧器, 産業用変圧器, ケーブルジョイント, generator sets,データセンター, 半導体装置, などなど.

光ファイバー温度センサー, インテリジェント監視システム, 中国の分散型光ファイバーメーカー