Quote:
Originally Posted by jameegray1
You can see the starter is completely out of position and body language is one of shock when the gates opened. Therefore it's either button accidentally pressed or gate malfunction. My understanding is that the gates are held shut by electrical charge and the starter opens the gates by cutting the circuit. Therefore all it would take is a small short circuit or power jump and the gates will fly open.
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Simtrak gates used in Australia, employ a mechanism which opens a circuit that releases the magnets holding the stall gates closed. In other words, the system is "power on"( normally closed circuit). When the starter presses the button, the power circuit opens, cutting power to the magnets which allows the stal gates to open.
Other gate manufacturers use an "inferior" or normally open, type circuit in which the stall gates are 'passive magnets". When the starter presses the button, the circuit closes which sends the current to the magnets to release the stall gates.
Most North American gates are made by United/Puett. I believe these operate as described in the former. Same as Simtrak.
https://www.unitedpuett.com/history
"On the existing United Puett gate, the front gates are held together with magnets which are deactivated when electricity running to the magnets is cut off by the starter. On the new gate, a bar runs across the top of the gate that turns, lifting and releasing latches on the fronts of the stalls."
