How the TRANSFORMER PROTECTOR works
    Explosion Prevention

    Logic Diagram

    The first dynamic pressure peak activates the TP before static pressure is built up. The transformer is therefore protected
    against explosion and fire without need for an actuator.

    When the TP activated, a signal is sent to the Control Panel. Upon receipt of a second signal from the transformer
    protection systems, such as Buchholz, sudden pressure or ground fault, the TP initiates an alarm for manual activation or
    automatic activation of the nitrogen injection inside the transformer tank



    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 channelled to a safe 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 Disc has burst and the transformer has been de-energized.

        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 further 
             explosive gas production

      10.  Damaged parts can be repaired 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. The Fire Extinction is activated manually or automatically when a signal is received by the Linear Heat Detector
    and by one of the transformer electrical protection devices.


PEOPLE SAFETY

 

Customer can choose between manual or automatic Nitrogen injection to eliminate explosive gases from the tank after the incident. This avoids fire or the bazooka effect caused when the remaining explosive gas comes in contact with air during transformer repair.