Ampliar relevadores de disparo y bloqueo sostenido para el barrido de barras por operacion de la proteccion diferencial de barras, en el número de alimentadores solicitado en Características Particulares,

Increase the quantity of firing relés and keep constant sustained blocking area for the sequential testing of busbars in the busbar differential protection operation,
b) Ampliar los relevadores de disparo y bloqueo sostenido (86B) para el barrido de barras por operación de la protección diferencial de barras, en el número de alimentadores solicitado en Características Particulares, y realizar el tendido y conectado del cable de control entre dicho relevador y los tableros existentes y los incluidos en el alcance de suministro de la obra.
http://www.scribd.com/doc/267817238/Caracteristicas-Generale...

Abstract
Due to the increasing complexity of our electrical power systems, the need for highly selective protection is
increasingly being fulfilled by the use ofline differential protection. Sometimes a transformer is included in the protected area of the line differential protection system. To test such a protection system thoroughly, a distributed end-to-end test with synchronized injection can be utilized.

4.Defining the Test sets configuration
The application note does not describe single end tests, wiring checks and parameter tests. To test the protection thoroughly such tests are also recommended.

2.3 Line(busbar) differential protection
A line differential protection system compares the current flowing into the protected area with the current flowing out of the protected area. Under normal conditions there should be nearly no difference between this currents. A high differential current (Idiff) indicates a fault on the line. The protection system should switch off the line as fast as possible if a fault occurs.
If a test case is open a click on the “Execute selected” button executes only the selected test step. A click on the “Execute all” button runs all test steps of the test case sequentially (see Figure 29top).
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