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How to startup or turn the STS250 on ?

Follow the below steps : 
1 - Check that the two sources are energized (voltage present).
2 - Set circuit breakers Q4  and Q6  to the ON position (position 1).
3 - Turn switch Q1BP to the ON position (position 1).  The load is supplied by Source 1 via the bypass.
4 - Set switches Q1 and Q3  to the ON position (position 1). 
5 - Turn switch Q1BP  back to the OFF position (position 0). 
6 - Set switch Q2 to the ON position (position 1).  The load is supplied by Source 1
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