Lösungen zur Temperaturüberwachung von Transformatoren
Ein umfassendes Sortiment an Temperaturüberwachungssystemen für Transformatoren, das die Erfassung von Hotspots mittels Glasfasersensoren, WTI, OTI sowie die Temperaturüberwachung von Trockentransformatoren abdeckt – abgestimmt auf Ihren Transformatorentyp und dessen Kritikalität.
- Glasfaser-Hotspot-Erkennung für kritische und Hochspannungstransformatoren
- WTI- und OTI-Temperaturanzeige für Öltransformatoren
- Temperaturüberwachung für Trockentransformatoren mit Alarm und Lüftersteuerung
Lückenlose Temperaturüberwachung
Temperaturüberwachungsgeräte für Glasfaser, WTI, OTI und Trockentransformatoren
Temperaturmessung an Transformatoren für Stromversorgungsanlagen
Eine genaue Temperaturmessung am Transformator ist unerlässlich, um die Isolierung zu schützen und ungeplante Ausfälle zu vermeiden. Ein Transformator-Temperatursensor erfasst die Wärmeentwicklung im Inneren des Geräts, da steigende Temperaturen die Alterung der Isolierung direkt beschleunigen und die Lebensdauer der Anlage verkürzen. Der Hotspot in der Wicklung ist in der Regel die erste Stelle, an der thermische Belastungen auftreten, und stellt daher den kritischsten Punkt für die Temperaturüberwachung des Transformators dar.
- Anhaltende Überhitzung beschleunigt die Alterung der Isolierung und verkürzt die Lebensdauer
- Die Temperatur an den Wicklungs-Hotspots ist oft der früheste Indikator für thermische Belastung
- Unterschiedliche Transformatorausführungen erfordern unterschiedliche Messverfahren
- Die kontinuierliche Messung ermöglicht eine frühzeitige Erkennung, bevor Schäden entstehen
Transformer Temperature Sensing Technologies
Four core temperature sensing technologies, each suited to different transformer types and criticality levels.
Fiber Optic Temperature Sensing for Transformer Hot Spots
A fiber optic temperature sensor measures winding hot-spot temperature directly at the source, offering complete immunity to electromagnetic interference for high-voltage and mission-critical transformers.
Transformer Winding Temperature Indicator (WTI)
A transformer winding temperature indicator simulates winding temperature rise based on load current and top-oil temperature, providing traditional and widely used transformer winding temperature monitoring.
Transformer Oil Temperature Indicator (OTI)
An oil temperature indicator in transformer applications directly measures top-oil temperature, providing simple and reliable local indication with alarm functions.
Transformer Temperature Monitors and Controllers
Browse our transformer temperature monitor and controller product lines.
WTI, OTI and Fiber Optic Temperature Monitoring Comparison
A quick reference to help select the right temperature monitoring method for your transformer.
| Monitoring Method | Typical Application | Measurement Target | Advantages |
|---|---|---|---|
| Temperaturüberwachung mittels Glasfaser | Critical power transformers | Direct winding hot spot temperature | EMI immune and high accuracy |
| WTI | Oil immersed transformers | Simulated winding temperature | Traditional and widely used |
| OTI | Oil immersed transformers | Maximale Öltemperatur | Simple and reliable |
| Dry Type Transformer Temperature Monitor | Dry type transformers | Winding temperature | Alarm and cooling fan control |
Transformer Hot Spot Temperature Detection
The winding hot spot is typically the location of highest thermal stress inside a transformer. Left undetected, an overload condition can push hot-spot temperature well beyond safe limits, accelerating insulation aging long before top-oil temperature shows any abnormal reading.
- Hot-spot temperature rises faster than top-oil temperature under load
- Undetected thermal stress leads to progressive insulation aging
- Overload conditions are a common trigger for hot-spot temperature rise
Frequently Asked Questions About Transformer Temperature Monitoring
What is a transformer temperature monitor?
A transformer temperature monitor is a device that continuously measures winding, oil, or ambient temperature and provides local display, alarm output, or remote signal transmission to detect overheating before it damages the transformer.
How does a winding temperature indicator work?
A winding temperature indicator uses a heating element powered by current transformer input, combined with a thermometer bulb in the top oil, to simulate the temperature rise of the winding above the surrounding oil temperature.
What is the difference between WTI and OTI?
A Winding Temperature Indicator (WTI) simulates winding temperature based on load current and top-oil temperature, while an Oil Temperature Indicator (OTI) directly measures the top-oil temperature of the transformer tank.
Why are fiber optic temperature sensors used for transformers?
Fiber optic temperature sensors provide direct hot-spot measurement inside energized windings with complete immunity to electromagnetic interference, making them suitable for high-voltage and mission-critical transformers.
How are dry type transformers monitored for temperature?
Dry type transformers are typically monitored using PT100 sensors embedded in the windings, connected to a temperature monitor and controller that provides display, alarm output, and cooling fan control.
How to choose a transformer temperature measurement system?
The choice depends on transformer type and criticality: fiber optic sensing suits critical power transformers, WTI and OTI suit oil-immersed transformers, and dedicated temperature monitors suit dry-type transformers.
Need the Right Temperature Monitoring Solution?
Customized solutions are available for transformer temperature measurement, WTI, OTI, fiber optic sensing and dry transformer monitoring.
