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I would ask about Over Load Shedding (OLS) and Under Frequency Load Shedding (UFLS) Simulation in PSS/E :

1. Based on the guide in PAGV2, simulation OLS using Over Current Relay (OCR) could only switched off the line in TIOCR model library. How to configure switched off the load?
2. Simulation UFLS using Under Frequency Relay (UFR) could only switched off the load, generator and shunt in LDS3xx model library. How to configure switched off the line for islanding study purposes?
3. How to create more than 3 step under frequency load shedding in LDSHxx?