Four or six independently adjustable contacts
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
Oil Temperature Indicators manufacturer
BWY-D804AITH Digital Oil Temperature Controller
A digital-capable transformer oil temperature controller with multiple switch contacts, Pt100 and current-signal options for local and remote monitoring.
BWY-D804AITH Functions for Transformer Temperature Control
Confirm how the selected configuration will indicate temperature, operate contacts and communicate with the remote system.
Pt100 and 4-20 mA output configurations
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
Multiple scale, power and capillary options for project matching
The final implementation follows the confirmed model code, outline drawing and terminal diagram.
BWY-D804AITH Technical Specifications
Use these values for initial comparison, then confirm the selected suffix, options and project interfaces in the current model documents.
| Default measuring range | 0°C to 150°C |
|---|---|
| Optional ranges | 0-160°C, -20-140°C or -45-150°C |
| Accuracy | Class 1.5 |
| Switch contacts | 4 or 6 adjustable contacts |
| Switching error | ±2°C |
| Switch differential | Stated as 5 ±3°C |
| Switch rating | AC 220 V / 5 A; DC 110 V / 3 A |
| Signals | Pt100 and 4-20 mA by configuration |
| Power options | AC/DC 220 V or DC 24 V configurations stated |
| Bulb and thread | Φ14 × 150 mm; M27 × 2 mm |
| Standard capillary | 6 m; custom lengths available |
| Protection grade | IP55 |
| Enclosure | 304 × 192 × 103 mm |
BWY-D804AITH Product Overview
The BWY-D804AITH combines a transformer oil temperature controller with remote signal capability and multiple adjustable switches. It supports local indication, cooling control, alarm logic and connection to a remote temperature display or supervisory system.
Several ranges and power arrangements are available. The dial scale, signal, contact quantity and supply must all appear in the purchase specification. A model name without its confirmed configuration is insufficient for a replacement order.
How Does the BWY-D804AITH Temperature Measurement Work?
The local sensing mechanism responds to top-oil temperature through the bulb and capillary. Adjustable contacts operate across the selected range.
Pt100 or 4-20 mA outputs connect to compatible remote equipment. An optional display can retransmit a 4-20 mA signal and provide RS485 communication according to the selected configuration.
How to Select the BWY-D804AITH
Confirm range, contact quantity, contact duty, signal, supply, capillary, enclosure mounting and remote display.
Provide the existing nameplate and panel cutout for retrofit work. Check that the receiving system accepts the specified signal and scale.
BWY-D804AITH Installation and Commissioning
Mount the enclosure securely, insert the bulb into the intended oil pocket and protect the capillary along its entire route.
Verify supply voltage before energization. Loop-test the Pt100 or current output and function-test all contact stages.
BWY-D804AITH Transformer Applications
Digital transformer top-oil monitoring
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Four-stage or six-stage control schemes
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Remote control-panel indication
Confirm the measurement point, contact logic, output and mechanical interface against the transformer project documents.
Oil temperature controller modernization
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 BWY-D804AITH Selection Resources
Compare the Product Category
Review other models for the same transformer temperature measurement and control function.
Compare oil 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 BWY-D804AITH 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.