The TH212IoT V3.1 is a controller dedicated to the protection and supervision of transformer ventilation systems. Developed to operate in conjunction with the TH104IoT temperature relay, its function is to ensure the correct operation of the fans, preventing failures that could lead to overheating and shutdown of the transformer.

Designed with a focus on reliability and connectivity, the TH212IoT automatically identifies abnormal situations such as overcurrent, obstruction, propeller jamming, or no load, activating the alarm and fault relays to alert the operator. In addition, it allows scheduling of automatic activation and periodic cycles, especially useful in periods of low use, such as in winter.

Its intuitive graphical interface, available in three languages, and connectivity via RS485 (Modbus RTU) and 2.4GHz Wi-Fi, allows easy integration with supervisory systems and complete remote monitoring via iot.thermtronic.net.

Main features and technical resources:

– 1 digital input for remote fan activation (e.g., TH104IoT signal)
– 2 outputs for fans or ventilation bars (7A peak/2.5A continuous/550VA)
– 1 alarm relay (ALARM), NO and NC dry contact
– 1 fault relay (TRIP or FAULT), NO and NC dry contact
– Monitoring and protection against overcurrent, undercurrent, obstruction, and propeller lockup
– Preventive action against shaft oxidation, with programmable periodic starts
– Programming of up to 5 times/days of the week for automatic fan activation
– Intelligent calibration with measurement of operating current and comparison with permitted variation
– Graphic fault messages with animations on the screen: UNDERCURRENT, OVERCURRENT (TRIP/FAULT)
– RS485 communication with Modbus RTU protocol support (up to 115,200 bps)
– 2.4GHz Wi-Fi connectivity for remote access via browser (configuration via local IP and cloud)
– Intuitive graphic display with easy navigation and status animations
– Multilingual menu (Portuguese, Spanish, and English)
– Manual relay testing directly on the front panel
– Date and time adjustment, and RESET function to restore factory settings
– Noise and overload protection on inputs and outputs
– Programming interface protected against inconsistent parameters
– Guaranteed operation during programming, without interruption of protection

General specifications:
– Power supply: 90 to 242 VAC (50/60Hz), consumption of 7 VA
– Communication: RS485 (Modbus RTU) and 2.4 GHz Wi-Fi
– Relays: ALARM and FAULT – dry NO/NC contacts – 7A/220Vac or 10A/125Vac
– Fan outputs: 7A peak / 2.5A continuous / 550VA (450W)
– Dimensions: 96 x 96 x 105 mm (DIN 43700), panel cutout: 92 x 92 mm
– Operating temperature: -10 to 60°C
– Mounting: side metal clips
– Weight: 370g
– Free Modbus software for Windows included

The TH212IoT V3.1 undergoes rigorous quality testing, including 72 hours of continuous operation (burn-in at 60°C), ensuring high durability and performance. Integration with the TH104 IoT enhances the thermal safety of transformers, offering a complete and intelligent system for modern industrial applications.