MESSKO® MTraB® dehydrating breather

for transformers, tap changers and other equipment

Maintenance-free dehydrating breathers from the MESSKO MTraB product line minimize the amount of moisture that gets into the insulating fluid of transformers, tap changers and other electrical equipment filled with insulating fluid.

Saving time and money:
Dehydrating breathers for transformers and industry

Conventional dehydrating breathers are filled with silica gel or similar desiccants. In the case of MESSKO MTraB products, the silica gel is dehumidified in the silica gel chamber by a built-in heating element controlled by a sensor. This minimizes the visual inspections that are required periodically and eliminates the need for costly, regular replacement of spent desiccant.

During normal operation, the air flowing toward the oil expansion vessel is guided over the desiccant (silica gel), which dries it. The degree of humidity of the air in the pipe is continuously measured by a humidity sensor and the results are transmitted to the electronic control system. If the moisture content (% rF) of the air in the pipe exceeds a certain specified value, the self-regulating heating element is activated in the silica gel chamber. The water vapor that escapes from the silica gel condenses on the specially shaped bottom part and drips out of the stainless-steel filter.

The temperature sensor enables the control system to monitor proper operation of the heating element. By using an additional heating system (optional), it is also possible to prevent the filter system from freezing in low outside temperatures. The measured temperature value in the pipe (dehydrating breather) is output as an analog signal by the control system. Faults in the control system or in the heating system are displayed by a fail-safe, live contact.

The right dehydrating breather for every application

For typical applications (transformers, on-load tap-changers or industrial processes), conventional dehydrating breathers filled with silica gel or similar desiccants are still used today in many places. The maintenance-free MESSKO MTraB dehydrating breathers are the perfect solution for this problem. Discover the different models for various requirements:

Maintenance-free dehydrating breather with alpha and beta control systems for transformers: MESSKO MTraB DB100

Areas of application include tap changers, arc suppression coils (Petersen coil), air-filled cable terminal boxes, traction transformers, network transformers, transformers with cyclic loading

Maintenance-free dehydrating breather with beta control system for transformers: MESSKO MTraB DB200

Areas of application include transformers with cyclic loading, network transformers, generator step-up transformers, phase shifters, shunt reactors

Maintenance-free dehydrating breather with beta control system for transformers: MESSKO MTraB DB200D

Areas of application include transformers with cyclic loading, generator transformers, network intertie transformers, phase shifters, shunt reactors

Maintenance-free dehydrating breather with gamma control system for transformers: MESSKO MTraB DB200G

Areas of application, special applications such as transformers installed in caverns, furnace transformers and GSU transformers with aperiodic ventilation behavior

Data logger for recording the temporal function sequence of the dehydrating breather

 

Possible applications of dehydrating breathers for transformers and industry

The dehydrating breathers for transformers from the MESSKO MTraB product line are the ideal solution for the constantly increasing requirements in regard to quality as well as reducing the lifecycle cost of power transformers and equipment.

Numerous energy providers have started retrofitting programs and are replacing conventional dehydrating breathers with the MESSKO MTraB. The MESSKO MTraB is perfectly suited to this retrofitting thanks to the various flange solutions offered.

Reasons for using the MESSKO MTraB dehydrating breather

With tens of thousands of units installed since its market launch in 2003, the dehydrating breathers of the MESSKO MTraB product line significantly reduce lifecycle cost for many customers around the world. Furthermore, the operational reliability of a transformer is increased on the whole by removing the risk of ingressing moisture from conventional dehydrating breathers that have not been replaced soon enough and are depleted as a result.

The use of dehydrating breathers for companies in the area of energy management and industry offers many advantages compared to conventional dehydrating breathers:

MESSKO MTraB dehydrating breathers Conventional dehydrating breathers
Visual inspections can be reduced to a minimum and performed in conjunction with other inspection and maintenance work Regular visual inspections to check the degree of moisture of the desiccant during the entire operating lifetime of the transformer
Enormous cost savings thanks to elimination of the costly regular replacement of the desiccant Regular replacement of the desiccant during the entire operating life of the transformer
Sensor-controlled “heating up” of the silica gel; control via moisture and temperature sensors Tremendous costs due to frequent refilling with desiccant, particularly in areas with continuously high humidity
No environmental pollution and disposal problems from spent desiccant Environmental pollution and disposal problems from spent desiccant
Higher dehydrating efficiency due to the larger contact surface and mechanical design Less efficient dehydration
Maintenance-free system; increased operational reliability High risk for the transformer if maintenance is not carried out

 

The right MESSKO MTraB dehydrating breather for transformers for every application

The following table of applications helps you determine which MESSKO MTraB type with matching control system (α, β or γ) is right for use with your transformer.

Application MESSKO MTraB type Control system
Tap changers DB100 α
Arc suppression coil (Petersen coil) DB100 α
Air-filled cable terminal boxes DB100 α
Traction transformers DB100 α
Network transformers ≤ 40 MVA DB100T β
Phase shifters ≤ 40 MVA DB100T β
Shunt reactors ≤ 40 MVA DB100T β
Network and generator step-up transformers > 40 MVA ≤ 200 MVA DB200T β
Phase shifters > 40 MVA ≤ 200 MVA DB200T β
Shunt reactors> 40 MVA ≤ 200 MVar DB200T β
Generator and network intertie transformers 200 MVA DB200D-T or 2 x DB200T β
Phase shifters > 200 MVA DB200D-T or 2 x DB200T β
Shunt reactors > 200 MVar DB200D-T or 2 x DB200T β
HVDC transformers DB200D-T or 2 x DB200T β
Furnace transformers DB200G γ
Cavern transformers DB200G γ
GSU transformers DB200G γ

 

α control system: Recommended for use with tap changers, arc suppression coils and traction transformers. Here, the dehydrating breather is heated, depending on conditions, by monitoring the humidity.

β control system: Self-learning system, which is recommended for use with transformers with cyclic loading (see table of applications). In addition to monitoring the humidity, it determines a time window in which the oil expansion vessel expels air and the dehydrating chambers are regenerated.

γ control system: Recommended for special applications such as transformers installed in caverns, furnace transformers and GSU transformers with aperiodic ventilation behavior. If the moisture content of the air flowing toward the transformer exceeds a specified value, the silica gel chambers are regenerated in alternation.