Friday, January 4, 2013
Automatic transfer switch
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| 1250A automatic transfer switch |
These circuit breakers have three positions.
The off (0) where the current does not pass the circuit controlled by the switch.
The on (1) where the voltage goes to the circuit
and the middle position, here appears with a yellow and agreen line left and right of the switch.
The first two positions (0 and 1) are controlled at will, the middle now (no one can put the switch in this position ), but happens only wen dropped automatically due to excessive current (over the limit set) .
From this position can only go off and then, if everything is okay and, in on position.
The switch in photo appears to have fallen on his own.
The switch is a tree pole.
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