TOT (TWT) Digital Transformer OilWinding Temperature Controller

The Transformer digital oil temperature controller mainly consists of a mechanical part and a digital sensing unit. The sealed system composed of elastic elements, sensing conduits, and temperature sensing components is filled with a temperature sensing medium. When the measured temperature changes, the volume of the temperature sensing medium inside the temperature sensing component changes accordingly. This volume increment is transmitted to the elastic element inside the instrument through the sensing conduit, causing it to produce a corresponding displacement. After amplification by the mechanism, this displacement can indicate the measured temperature and drive the micro switch to output a switch control signal to drive the cooling system, achieving the purpose of controlling the transformer temperature. Transformer digital oil temperature controller adopts composite sensing technology, which converts the Pt100 platinum resistance signal installed in the temperature pack into RS48

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Application :

Oil immersed transformer

Product features:

The product utilizes dual diaphragm box compensation technology, achieving all-weather 1.5% FS, meeting the standard of State Grid DL/T1400.3-2023;
The product meets the standards of State Grid Digital Meter Q/GDW 12355.4-2023;
The product process adopts high-frequency welding and self flowing filling technology, and the temperature pack is reliable and does not leak liquid；
Multiple output signal modes are available for the product (Pt100, 4-20mA, RS485);
The product is equipped with six sets of temperature control switches, with graded cooling capacity. The switch points can be set freely within the full range;
The product shell is designed with an integrated structure of alloy die-casting, which is easy to disassemble and has higher strength;
Protection level IP67.

Technical parameters:

TECHNICAL INDEX

Product Features	Describe.
Environmental temperature	-40℃~+70℃
Measurement range	0℃~+150℃（Customizable according to user needs.）
Relative humidity	≤95%（No dew formation）
Number of switches	Up to 6 adjustable switches.
Switching capacity	AC 220V/5A、DC110V/3A
Output signal	Pt100、4-20mA、RS485
Accuracy level	1.5%FS
Motion error	±2.0℃
Capillary length	Standard with 6 meters (other lengths can be customized)
All-weather temperature error	±2.0℃
Protection level	IP67

Electromagnetic Compatibility Performance

Standard of Detection	Level
GB/T 17626.2 Electrostatic Discharge (ESD)	Level 4
GB/T 17626.3 Radio frequency electromagnetic field radiation	Level 3
GB/T 17626.8 Power frequency magnetic field	Level 5
GB/T 17626.9 Pulsed magnetic field	Level 5
GB/T 17626.10 Damped oscillating magnetic field	Level 5
GB/T 17626.11 Voltage sag	Level 3
GB/T 17626.4 Electrical Fast Transient/Bursts	Level 4
GB/T 17626.5 Surge (spike)	Level 4
GB/T 17626.6 Conducted disturbances induced by radio frequency fields	Level 3

Optional features:

Transformer digital oil temperature controller has multiple parameters to choose from, which can meet the needs of various oil immersed transformers at home and abroad, including output signal, range, switch contacts, installation size, installation thread, instrument rain cover and temperature bulb rain cover, etc.

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