he Qualitrol STB series intelligent transformer respirator enters the oil immersed transformer or Filter moisture from the air of the LTC oil storage tank. The respirator automatically resets according to the user's selected time interval or relative humidity (RH) threshold Raw silicone desiccant. Alarm and communication functions reduce unnecessary maintenance costs for respirators over time. Silicone desiccant, due to its ability to regenerate multiple times without the need for replacement, can eliminate accumulated water during the transformer's exhalation cycle. ·By continuously protecting the moisture in the atmosphere during the exhalation cycle of the transformer, extending the service life of the equipment, reducing unnecessary maintenance through the self regeneration function of the desiccant during the transformer exhaust cycle, and providing a continuous relative humidity (% RH) level state with a 4-20mA signal Standard model design is suitable for most applications and offers various sizes with a 5-year warranty ·The polar model provides additional internal heaters to withstand harsh temperatures down to -60 degrees Celsius ·The extreme ocean model XtremeTM contains special application materials to adapt to harsh marine environments ·Provide multiple installation applications for new or modified installations ·Includes a solenoid valve to ensure that moisture does not accidentally enter the transformer during the regeneration process ·Users can set desiccant regeneration based on% RH relative humidity level or time frequency (days) ·Silicone color change allows for visual confirmation of respirator regeneration status ·Multiple communication options, including 4-20mA, RS-485 MODBUS, and local USB interface, provide various monitoring solutions for various applications ·The LED indicators installed on the front panel are green, amber, and red to indicate breathing status and alarm function ·Color coded light alarm display in the control box for easy on-site diagnosis