Latest articles on mGard trapped key safety interlock 
Fortress Interlocks Voltage Switching units save time and increase safety(29/01/2008)
Fortress Interlocks has extended its range of mGard trapped key safety interlocks by introducing a range of Voltage Switching units that prevent the removal of a gate access key whilst a machine is in motion. Voltages on a machine are generated even if the power has been switched off and the machine is in its run-down cycle. The VS units from Fortress monitor the voltage on the windings of the machine’s motor, in addition to any shorts or open circuits, and grant access only when it is safe t... [more]
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