BWDK-326 Temperature Controller Model and Function
Date: July 10, 2025 08:34:05
BWDKThe -326 series of dry-type transformer temperature controllers are available in a variety of models, each of which corresponds to a different functional configuration, as described below:
| model number | Functional Description |
|---|---|
| BWDK-326D(regular type) | Three-phase circuit measurement and display; input open circuit and fault self-test display and output;Cooling FansAutomatic start-stop output; over-temperature alarm display and output; over-temperature trip display and output; fan manual/automatic control of the two state display, output and mutual switching; digital compensation of the display value of each channel; "black box" function; fan timing start-stop control function; output state detection. |
| BWDK-326E | Same as D-type, with the addition of three independent 4~20mA analog current outputs. |
| BWDK-326F | Same as D type, with added RS-485 serial communication function. |
| BWDK-326G | Same as type D, with one additional way of measuring and controlling the ambient temperature of the machine room. |
| BWDK-326I | The same as D type, adding a transformer core temperature measurement and alarm. |
| BWDK-326EF | On the basis of D type, RS-485 communication function and 4~20mA analog current output are added at the same time. |
Key functional features:
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Temperature monitoring and controlReal-time monitoring of three-phase winding temperature, automatic start and stop cooling fan, over-temperature alarm and trip protection.
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communication function: Some models (e.g. F-type, EF-type) support RS-485 communication interface and Modbus protocol to realize remote data transmission and centralized management.
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analog output: Some models (e.g., E-type, EF-type) provide 4~20mA analog current output, which is convenient for remote monitoring system integration.
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black box function: Record the temperature and equipment status at the moment of power failure for easy fault analysis.
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Sensor Failure Detection: Supports sensor open circuit and short circuit detection, and displays the fault phase and type.
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anti-interference design: Conforms to IEC61000-4 international standards and adapts to industrial complex environments.
The above models are widely used in electric power systems, industrial automation, building electrics and other fields, users can choose the right model according to the actual needs.
The BWDK-326 supports the following functions related to fan control:
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Cooling fan automatic start/stop outputWhen the transformer winding temperature reaches the set fan start temperature, the temperature controller will automatically start the fan for forced air cooling; when the temperature drops below the set fan shutdown temperature, the fan will automatically stop.
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Fan manual/automatic control switching: Users can manually control the start and stop of the fan through the panel buttons, or set it to automatic control mode to realize unattended operation.
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Fan timer start/stop functionIn order to prevent the fan from rusting or clogging when it is not running for a long period of time, BWDK-326D also has the function of starting the fan at regular intervals, and the user can set the regular time so that the fan will run automatically for a certain period of time after it reaches the set time.
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Wind turbine condition detection and protection: The thermostat detects fan operation status and sends an alarm signal in case of fan failure or sensor abnormality.
BWDK-326 not only can automatically adjust the cooling fan start and stop, but also has a perfect fan protection and management functions, suitable for dry-type transformer temperature control has high requirements of the occasion.
