How the TRANSFORMER PROTECTOR works
    Explosion Prevention


    Logic Diagram

    When an electrical fault occurs in the transformer, the TRANSFORMER PROTECTOR (TP) is activated by the first dynamic pressure peak of the shock wave. The mechanical TP activation protects the transformer against explosion and fire without need of an actuator.


    When the TP is activated allowing the transformer depressurization, an alarm is sent to the TP Control Panel.


    Principle
       

        1.  The first dynamic pressure peak of the shock wave created at the electrical arc ignition activates the TP before static 
             pressure increases

        2.   Oil-Gas mixture evacuation to the Oil-Gas Separation Tank.

        3.  Conservator Shutter closes

        4.   The Air isolation Shutter prevents oxygen form coming in contact with the flammable oil-gas mixture

* Please click on picture ( For view the enlarged image ).

 

        5.  Explosive and flammable gases open the Air Isolation Shutter and are channeled to a safe, remote area or outside the  
              building.

        6.   Nitrogen injection may be initiated either manually or automatically when the Control Panel receives indication that 
              the Depressurisation Set Rupture Discis opened.

        7.   Manual or automatic nitrogen injection ends explosive gas generation and evacuates the explosive gas to protect 
              maintenance personnel from fire and explosion (bazooka effect) when opening the transformer after an incident

* Please click on picture ( For view the enlarged image ).

 

       8.   The protected oil capacities are immediately confined under a safe nitrogen atmosphere

       9.   Nitrogen injection continues for 45 minutes to ensure the cooling of the protected oil capacities to avoid definitively 
             stop the explosive gas production.

      10.  The repair work can start safely as the tank is free from explosive gases


* Please click on picture ( For view the enlarged image )


    Fire Extinction
     Logic Diagram


    The Nitrogen Drain and Stir Fire Extinguishing system is used as back-up to the TRANSFORMER PROTECTOR explosion
    prevention system. The Fire Extinguisher is activated either manually or automatically when a signal is received by the Linear
    Heat Detector
and by one of the transformer electrical protection devices.



PEOPLE SAFETY

 

After an insulation failure, explosive gases are generated. These gases need to be channelized to a remote location. This action is needed to protect maintenance personnel from fire and explosion (bazooka effect).

Customers can choose between manual or automatic inert gas injection.