The implementation of smart substation depends on the application of smart electrical power apparatus. Smart electrical power apparatus tightly integrates the sensors to the body of apparatus and passes the control and measurement information via the network using IEC 61850 packets to utility’s management system. The introduction of network and packets fundamentally changes the mechanism on how to control and monitor the electrical power apparatus. This requires a smarter and high efficient approach to perform integration tests for smart high voltage switchgears. This paper analyzes the characteristics of measurement and control information for smart high voltage switchgears. It introduces the methodology for the integration test based on the simulation and analysis techniques for IEC 61850 packets. It describes the implementation of the system based on the methodology and explains how to design multi-step tests for the switchgears and how to simulate the auto-reclose and how to conduct the stress testing for the switchgears.