دورات من شركة abb للوقاية الكهربائية عن الـ PROTECTIONS
 

و هي عبارة عن دورة واحدة تم تقسيمها الى اربع اقسام لكبر حجمها


PROTECTI**S

تتضمن

1)PRINCIPLES

-Introducti**
-General C**cepts of protecti** systems
-Elements of protecti** system
-Relay types
-Relay design and c**structi**
Relay operating principles-
-Applying protective relays

2)LINES PROTECTI**

-Introducti**
-Selecting a protective system
*Over current protecti**
*Directi**al overcurrent protecti**
*Distance protecti**
*Pilot protecti**
*Reclosing

3)TRANSFORMERS PROTECTI**

-Introducti**
-Selecting a protective system
*Differential protecti**
*Sudden pressure relay
*Overcurrent protecti**
*Transformer Tank protecti**
Typical protective scheme for power transformers


4)STATI** BUS PROTECTI**

-Introducti**
-Selecting a protective system
*The linear coupler differential system
*Multirestraint differential system
*Overcurrrent differential protecti**
*High impedance differential system
*Moderately high impedance relay
*Protecting a bus with transformer bank
*Protecting a double bus single breaker
*Other protecti** systems



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