Transformer Oil Temperature Indicators (OTI)
BWY and BWY2 oil temperature indicators measure transformer top-oil temperature and operate adjustable contacts for cooling or high-temperature alarm.
Compare BWY oil temperature indicators
OTI, WTI, BWY and BWR manufacturer
Transformer Temperature Monitoring Systems and Controllers
Choose OTI oil temperature indicators, WTI winding temperature indicators and remote monitoring devices for new transformers, OEM production and replacement projects.
Start with the required measurement - Transformer top-oil temperature
- OTI / BWY
- Simulated winding temperature
- WTI / BWR
- Temperature, level and pressure
- Monitoring device
Product range
Choose the Right Transformer Temperature Product
Start with the temperature you need to monitor and the action required when it rises.
Transformer Winding Temperature Indicators (WTI)
BWR and BWR2 winding temperature indicators combine top-oil sensing with load-current thermal simulation for winding indication and control.
Compare BWR winding temperature indicatorsTransformer Monitoring Devices
Send oil temperature, oil level and pressure data to a compatible terminal or SCADA system through RS485.
View monitoring devicesOEM and Replacement Support
Match the range, contacts, output, capillary, bulb, thread, mounting and terminal arrangement for new production or replacement work.
OEM and replacement optionsPopular model families
BWY Oil and BWR Winding Temperature Controllers
Compare product photos, key specifications and available signals before requesting a datasheet and quotation.
BWR2
BWR2 Transformer Winding Temperature Indicator
A mechanical WTI gauge and compound transmitter for simulated winding temperature indication on oil-immersed transformers, with adjustable contacts and remote signal options.
View BWR2 specifications
BWY2
BWY2 Transformer Oil Temperature Indicator
An OTI gauge for transformer top-oil temperature indication, adjustable cooling and alarm contacts, and remote measurement output.
View BWY2 specifications
BWR-04 / BWR-06
BWR-04/06 Winding Temperature Controller
A BWR winding thermometer family for simulated winding temperature, switch control and remote 4-20 mA configurations.
View BWR-04 / BWR-06 specifications
BWY-802 / BWY-803
BWY-802/803 Oil Temperature Controller
A transformer top-oil temperature controller with local indication, Pt100 remote signal and adjustable control contacts.
View BWY-802 / BWY-803 specificationsHow the system works
What Is a Transformer Temperature Monitoring System?
A transformer temperature monitoring system shows top-oil or simulated winding temperature and can start cooling equipment, trigger an alarm or send a signal to a PLC, RTU, SCADA system or remote display. OTI and WTI instruments measure different thermal values and should be selected separately.
These values are related but not interchangeable. Top-oil temperature describes the oil near the specified thermometer pocket. Simulated winding temperature estimates the additional thermal effect of transformer load. Direct winding hot-spot measurement requires sensors designed into the winding and represents another measurement architecture.
How do temperature controllers support transformer protection?
Adjustable contacts can start transformer fans or pumps, initiate a high-temperature alarm or provide an input to trip logic. Set points and switching duties must follow the transformer thermal design and protection scheme. The complete control chain includes the temperature instrument, terminal wiring, interposing relays and the final cooling or protection equipment.
Which remote signals are available?
Common project interfaces include Pt100 resistance output, conditioned 4-20 mA current loops and RS485 communications. Selection must define the signal scale, supply, wiring, shielding, protocol and receiving equipment. A remote signal should always retain the measurement identity, such as top oil or simulated winding temperature.
Applications
Where Transformer Temperature Controllers Are Used
Find products for power transformers, distribution transformers, substations, cooling control and retrofit work.
Power Transformer Temperature Monitoring
Coordinate top-oil indication, simulated winding temperature, cooling stages and remote signals as one transformer thermal-control scheme.
Review power transformer temperature monitoringDistribution Transformer Temperature Monitoring
Choose the required balance of local visibility, cooling control and remote condition data for distribution transformer fleets and compact substations.
Review distribution transformer temperature monitoringTransformer Cooling, Alarm and Trip Control
Translate temperature indication into dependable cooling, alarm and protection actions without confusing contact duty, set point and measured value.
Review transformer cooling, alarm and trip controlSubstation Remote Temperature Monitoring
Select the field signal and receiving architecture that turns transformer temperature into usable, traceable substation data.
Review substation remote temperature monitoringFor buyers and engineers
Request a Datasheet and Quote
Send the transformer type, OTI or WTI requirement, existing model, measuring range, contact functions, Pt100, 4-20 mA or RS485 output, power supply, capillary, bulb, thread, quantity and destination country. For a replacement, attach nameplate and terminal photos.
Focused transformer temperature products
INNO supplies oil temperature indicators, winding temperature indicators and monitoring devices for oil-immersed transformers.
Product groups: OTI, WTI and integrated monitoring devices.
Model families: BWY, BWY2, BWR and BWR2.
Project types: new transformers, OEM production and replacements.
Sales and engineering support
Request a Transformer Temperature Controller Datasheet and Quote
Tell us the transformer type, required temperature range, contact functions, output signal, capillary length, quantity and destination. We will help you identify a suitable model and send the available technical documents.