High Accuracy Transformer Temperature Monitoring Solutions
We are a leading Oil & Winding Temperature Indicator manufacturer and supplier in India, offering reliable temperature monitoring solutions for power and distribution transformers. Oil Temperature Indicators (OTI) and Winding Temperature Indicators (WTI) are essential transformer protection instruments used to monitor transformer oil temperature and winding temperature during operation.
These temperature indicators play a critical role in transformer safety, thermal monitoring, and protection systems by helping operators monitor heat conditions and prevent overheating. Accurate temperature monitoring improves transformer reliability, protects insulation systems, and increases equipment life.
 
Our transformer temperature indicators are widely used in:
Power transformers
Distribution transformers
Electrical substations
Industrial power systems
Renewable energy projects
Power generation plants
 
What is an Oil Temperature Indicator (OTI)?
An Oil Temperature Indicator (OTI) is a temperature monitoring instrument used to measure the top oil temperature of oil-filled transformers. During transformer operation, electrical losses generate heat that increases oil temperature. Monitoring this temperature is important for maintaining safe transformer operation.
The OTI senses transformer oil temperature and displays it on the indicator dial. Many models also provide electrical contacts for alarm and trip functions when the temperature exceeds preset limits.
 
What is a Winding Temperature Indicator (WTI)?
A Winding Temperature Indicator (WTI) measures the simulated winding temperature of a transformer. Since direct measurement of winding temperature is difficult, the WTI uses a thermal image technique based on oil temperature and load current to estimate winding hot-spot temperature.
WTIs are important for protecting transformer windings from overheating and insulation damage during overload conditions.
Importance of OTI & WTI in Transformers
 
Temperature is one of the most critical factors affecting transformer life. Excessive temperature rise can:
Reduce insulation strength
Accelerate aging of transformer oil
Increase risk of internal faults
Reduce transformer efficiency
 
Installing reliable OTI and WTI instruments helps maintain safe operating conditions and enables preventive maintenance before serious damage occurs.
Features of Oil & Winding Temperature Indicators
Our transformer temperature indicators are designed for high accuracy, durability, and reliable long-term operation.
 
Key Features
✔ Accurate oil and winding temperature monitoring
✔ Suitable for power and distribution transformers
✔ Analog dial type with clear visibility
✔ Alarm and trip contacts for protection systems
✔ Durable weatherproof construction
✔ High reliability in outdoor environments
✔ Long operational life with low maintenance
✔ Easy installation and calibration
 
Applications
Power Transformers
Monitoring oil and winding temperature in substations and transmission systems.
Distribution Transformers
Protecting transformers in utility power distribution networks.
Industrial Electrical Systems
Used in industrial transformers for thermal monitoring and overload protection.
Renewable Energy Systems
Installed in solar and wind power transformer systems.
Power Plants
Supporting transformer protection in generation and auxiliary systems.
 
Construction & Working Principle
Oil and Winding Temperature Indicators typically consist of:
Temperature sensing bulb
Capillary tube
Dial indicator mechanism
Electrical contacts for alarm and trip
The sensing bulb detects transformer oil temperature and transfers thermal movement through the capillary system to the dial indicator.
In WTIs, an additional heating element connected to the transformer current transformer (CT) simulates winding temperature rise to indicate winding hot-spot temperature.
 
Benefits of Using OTI & WTI
Using high-quality Oil & Winding Temperature Indicators offers several operational advantages:
Improves transformer safety
Prevents overheating and insulation failure
Enables early fault detection
Enhances transformer reliability
Supports preventive maintenance
Extends transformer service life
 
Why Choose Us?
As a trusted Oil & Winding Temperature Indicator manufacturer in India, we provide high-quality transformer monitoring instruments designed for reliable performance in demanding electrical environments.
We Offer:
Precision-engineered products
Durable industrial construction
Fast supply across India
Support for bulk and project orders
Reliable after-sales support
 
Supply Across India
We supply OTI and WTI instruments across:
Delhi NCR
Mumbai
Chennai
Bangalore
Hyderabad
Pune
Ahmedabad
Kolkata
All major industrial regions in India
 
Final Note
Reliable transformer temperature monitoring is essential for safe and efficient power system operation. Our Oil & Winding Temperature Indicators (OTI & WTI) provide accurate temperature measurement, dependable protection, and long-term reliability for power and distribution transformers across industrial and utility applications.