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
Specify oil temperature indicators, winding temperature indicators and remote monitoring devices for oil-immersed transformer cooling, alarm, trip and SCADA projects.
Start with the required measurement - Transformer top-oil temperature
- OTI / BWY
- Simulated winding temperature
- WTI / BWR
- Temperature, level and pressure
- Monitoring device
Product portfolio
OTI, WTI and Transformer Temperature Monitoring Devices
INNO supplies focused instrument families for local indication, thermal control and remote transformer monitoring.
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 Temperature Monitoring Devices
Powered monitoring devices acquire transformer oil temperature with oil level and pressure for compatible remote terminals and supervisory systems.
Review transformer monitoring devicesCustom Controller and Replacement Selection
Match range, contacts, signal, capillary, bulb, thread, mounting and existing terminal arrangement before approving a new or replacement controller.
Review OEM and replacement optionsModel families
BWY Oil and BWR Winding Temperature Controller Models
Compare real product images and model-specific planning data before requesting the current datasheet, drawing 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 specificationsDirect technical answer
What Is a Transformer Temperature Monitoring System?
A transformer temperature monitoring system measures or derives defined thermal values, displays them locally or remotely, and provides outputs for cooling, alarm or trip logic. An OTI measures top-oil temperature. A traditional WTI combines top-oil temperature with a load-current-related thermal rise to indicate simulated winding temperature. A digital monitoring device can transmit temperature and other transformer condition values to a remote system.
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.
Application engineering
Transformer Temperature Monitoring Applications
Choose the product after defining the transformer, thermal variable, operating decision and receiving system.
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 monitoringProcurement checklist
Request a Transformer Temperature Controller Quotation
Include the transformer type and rating, OTI or WTI requirement, existing model, measuring range, switch functions, Pt100, 4-20 mA or RS485 interface, supply, capillary, bulb and thread, quantity and destination country. Attach a nameplate photograph or mounting drawing for replacement work.
Manufacturer and supplier support
Use the product pages to compare model families, then email the final requirement for configuration review, current technical documents and commercial quotation.
Product groups: OTI, WTI and integrated monitoring devices.
Model families: BWY, BWY2, BWR and BWR2.
Project types: new transformer, OEM configuration and replacement.
Direct engineering contact
Specify a Transformer Temperature Monitoring System
Email the transformer type, model reference, measuring range, output, switch contacts, capillary length, quantity and destination country. INNO will reply with the applicable configuration details.