Default 0-150°C scale with optional 0-160°C configuration
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
Winding Temperature Indicators manufacturer
BWR-04/06 Winding Temperature Controller
A BWR winding thermometer family for simulated winding temperature, switch control and remote 4-20 mA configurations.
BWR-04 / BWR-06 Functions for Transformer Temperature Control
Confirm how the selected configuration will indicate temperature, operate contacts and communicate with the remote system.
Mechanical indication with switch and 4-20 mA model options
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
Standard Φ14 × 150 mm bulb, M27 × 2 thread and 5 m capillary
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
BWR-04 / BWR-06 Technical Specifications
Use these values for initial comparison, then confirm the selected suffix, options and project interfaces in the current model documents.
| Referenced model | BWR-04J(TH) |
|---|---|
| Default measuring range | 0°C to 150°C |
| Optional range | 0°C to 160°C |
| Accuracy | Class 1.5; stated detection-point error ±2.25°C |
| Switching error | ±2°C |
| Switch rating | AC 220 V / 5 A; DC 220 V / 3 A |
| Output for J configuration | 4-20 mA |
| Power supply | AC 220 V ±10%, 50-60 Hz |
| Operating ambient | -40°C to +55°C; altitude up to 2,000 m |
| Protection grade | IP55 |
| Bulb and thread | Φ14 × 150 mm; M27 × 2 mm |
| Standard capillary | 5 m |
BWR-04 / BWR-06 Product Overview
The BWR-04 and BWR-06 families are winding temperature controllers for oil-immersed transformers. They use a top-oil sensing system and a load-current thermal simulation element to provide a winding-temperature indication. Model suffixes identify output and contact configurations, so the exact suffix is required for procurement.
The referenced BWR-04J(TH) configuration provides a 4-20 mA current signal. Other members of the family may use different outputs, contact quantities or special-environment suffixes. The published family range is useful for initial selection, but the final quotation must follow a confirmed datasheet and drawing.
How Does the BWR-04 / BWR-06 Temperature Measurement Work?
The sensing bulb follows top-oil temperature while the load-current converter drives an internal heating element. The additional heating represents winding-to-oil temperature rise. The mechanical system sums both effects and moves the pointer.
Switch contacts can control cooling, initiate an alarm or contribute to trip logic. The 4-20 mA output allows a compatible remote display or monitoring system to receive the indicated temperature.
How to Select the BWR-04 / BWR-06
Send the existing BWR-04 or BWR-06 code, scale, contact quantity, CT input, output, supply, capillary length and installation drawing.
Specify whether the instrument must match an existing mounting footprint or whether a new transformer design can use the current standard dimensions.
BWR-04 / BWR-06 Installation and Commissioning
Keep the instrument vertical and protect the capillary. Verify the sensing bulb, thread and pocket depth before installation.
Commission the local pointer, each switch contact, CT circuit and remote current loop. Confirm polarity and scaling at the receiving instrument.
BWR-04 / BWR-06 Transformer Applications
Oil-immersed transformer winding indication
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
BWR-04 and BWR-06 replacement projects
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Remote 4-20 mA temperature indication
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Cooling, alarm and trip contact control
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Specifications and available options vary by model configuration. Request the current datasheet, outline drawing and terminal diagram before approving an order.
Related BWR-04 / BWR-06 Selection Resources
Compare the Product Category
Review other models for the same transformer temperature measurement and control function.
Compare winding temperature indicatorsPlan Cooling, Alarm and Trip Control
Review how OTI and WTI contacts support transformer cooling stages and protection logic.
Transformer cooling and protection applicationPrepare a Replacement
Compare existing codes, outputs, capillary routing and mounting interfaces before a controller replacement.
Transformer OTI and WTI replacement guideReview Supplier Documents
Check available management-system, conformity and qualification materials for procurement review.
Certification and qualification documentsDirect engineering contact
Request BWR-04 / BWR-06 Selection and Pricing
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.