Default 0-150°C scale with optional 0-160°C configuration
Choose the scale that matches the transformer specification and existing dial range.
Winding Temperature Indicators manufacturer and supplier
BWR-04/06 Winding Temperature Controller
A BWR winding thermometer family for simulated winding temperature, switch control and remote 4-20 mA configurations.
What the BWR-04 / BWR-06 Does
See how this model supports temperature indication, control contacts and remote monitoring.
Mechanical indication with switch and 4-20 mA model options
Keep a local mechanical display while sending a conditioned current signal to the control panel.
Standard Φ14 × 150 mm bulb, M27 × 2 thread and 5 m capillary
Compare the bulb, thread and capillary with the transformer drawing before ordering a replacement.
BWR-04 / BWR-06 Technical Specifications
Use these values to compare models. Request the latest datasheet and drawing for the exact suffix you plan to order.
| 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 the BWR-04 / BWR-06 Measures Temperature
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.
Selecting the Correct 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.
Where the BWR-04 / BWR-06 Is Used
Oil-immersed transformer winding indication
BWR-04 and BWR-06 replacement projects
Remote 4-20 mA temperature indication
Cooling, alarm and trip contact control
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 documentsSales and engineering support
Request BWR-04 / BWR-06 Datasheet and Pricing
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.