MTH Model

    MTH model showed the TRANSFORMER PROTECTOR reliability


    Numerical simulations were performed over a wide range of configurations (transformer geometries and power ratings, arc   
    characteristics). They showed that a transformer, equipped with a TP, is prevented from rupturing when subjected to severe
    internal faults.

    On the contrary, for the same arcing conditions, when the TP is NOT installed on the transformer, the mechanical stresses
    reach the structure mechanical withstand imit to the tank rupture.

 



Mechanical Withstand of a Transformer Structure Subjected to Internal Arcing, 333 MVA, 70KA, 83ms


 

TEST CERTIFICATE

 

The CEPEL Test Certificate stated that no permanent deformation have been
noticed on the 3 tanks, despite 10 tests performed per tank, pressure gradients up to 4,000 bar/sec (58,000 psi/sec) and accelerations up to 400g.


 

The MTH Model

Comparison with the PRV

Power Plant Transformers

Pressure Wave Propagation Modelling

MTH model and Transformer reliability

Transformer Protector Tests

Results