Maintenance-free intelligent transformer breather-Jiangsu jotry Electric Technology Co., Ltd.

Maintenance-free intelligent transformer breather

The maintenance-free transformer breather is an air dehumidification and purification device used for oil-immersed transformers, instrument transformers, on-load tap changers, or other electrical equipment filled with insulating liquid. The maintenance-free transformer breather is installed at the air inlet of the instrument transformer's oil storage tank. When the transformer or instrument transformer operates, the oil volume changes due to temperature variations, causing the gas inside the oil storage tank to breathe through the desiccant. Air passes through the filter at the bottom of the desiccant and the glass jar filled with silica gel into the transformer, ensuring that the inhaled air is dry (moisture is adsorbed by the desiccant) and clean (dust and impurities are blocked by the filter), thereby maintaining the cleanliness and insulation strength of the transformer oil.

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Smart ring main unit / box transformer

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Maintenance-Free Transformer Breather

Product Overview

The maintenance-free transformer breather is an air dehumidification and purification device used for oil-immersed transformers, instrument transformers, on-load tap changers, or other electrical equipment filled with insulating liquid. The breather is installed at the air inlet of the instrument transformer's oil conservator. When the transformer or instrument transformer operates, changes in oil temperature cause the oil volume to expand or contract, forcing the gas inside the oil conservator to breathe through the desiccant. Air passes through the lower filter of the desiccant and the silica gel-filled glass container into the transformer, ensuring that the inhaled air is dry (moisture is adsorbed by the desiccant) and clean (dust and impurities are blocked by the filter), thereby maintaining the cleanliness and insulation strength of the transformer oil.

Product Features

(1) Oil Cup Design: Compatible with traditional breather habits, clearly indicating the current breathing status of the transformer.

(2) Auxiliary Heating: When the ambient temperature is low, auxiliary heating is activated to prevent condensation or freezing of the bottom filter device; it also prevents the oil in the oil cup from freezing at low temperatures.

(3) Condensate Discharge: During regeneration heating, ensures rapid discharge of condensate on the glass wall.

(4) Desiccant Pulverization Treatment: The device is subjected to long-term vibration and desiccant regeneration heating, which causes desiccant pulverization. This device optimizes the structure to ensure that pulverized desiccant does not block the air inlet.

(5) Heating Device Fault Detection: Monitors heating power to determine the reliability of the heating device.

(6) Breathing Volume Monitoring: Measures the breathing volume over a cycle to detect leaks in the connecting pipe; establishes the relationship between transformer oil temperature, breathing volume, and breathing speed.

Product Advantages

Product Functions

1. Installed at the air inlet of the oil conservator, it prevents moist air from directly entering the transformer through drying and absorption, maintaining the excellent electrical performance of the transformer insulating oil.

2. The dryer can be heated and regenerated. Water vapor passes through the metal mesh and condenses on the glass cylinder, with water droplets flowing out of the desiccant along the glass cylinder. Desiccant regeneration heating can be achieved in two ways: according to a preset time interval or when humidity reaches 40%.

3. In case of failure, on-site and remote audible and visual alarms can be triggered, and remote monitoring of the breather status can be realized via RS485.

Technical Parameters

Power Environment
Control System Power Supply	AC220V±10%, 50/60Hz
Electromagnetic Compatibility Test and Measurement Technology	GB/T 17626.2-2006 Electrostatic Discharge Immunity Test GB/T 17626.3-2006 Radiated Radio-Frequency Electromagnetic Field Immunity Test GB/T 17626.4-2008 Electrical Fast Transient/Burst Immunity Test GB/T 17626.5-2008 Surge (Shock) Immunity Test GB/T 17626.8-2006 Power Frequency Magnetic Field Immunity Test
Environmental Tests for Electrical and Electronic Products	GB/T 2423.1-2008 Test A: Low Temperature GB/T 2423.2-2008 Test B: High Temperature GB/T 2423.3-2006 Test Cab: Constant Damp Heat Test
Functions
Moisture Absorbent Material	Colorless Silica Gel
Silica Gel Weight	1.5kg, 3kg, 5kg (Dual Tank)
Regeneration Frequency	Can be set according to installation requirements; default is 30 days.
Regeneration Cycle	2 hours
Relative Humidity Threshold	User Configurable; default is 60%
Dehydration Method	Online Automatic Dehydration
Heating Temperature	Internal heating up to 100°C, bottom heating up to 20°C
Heater Power	1.5kg: 270W, 3kg: 270W, 5kg: 360W
Output Interface	RS485
Communication Protocol	MODBUS RTU
Status Display	4 LEDs (Green: Running, Yellow: Left/Right Tank Heating, Red: Fault) 4 LEDs + 2 sets of 3-digit digital tubes displaying: measured temperature, measured humidity, accumulated days, and accumulated hours.
Operating Conditions
Ambient Temperature	-40°C to 80°C
Relative Humidity	>90%
Control Box Protection Level	IP55

Software Copyright and Patents

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