Let's start by finding out exactly what a disconnect is and what it does.
Disconnect switches interrupt power to an electrical circuit. Basically they 'disconnect' the circuit.
Generally disconnect switches are used as a safety device to interrupt a circuit so that maintenance can work on equipment.
Additional applications for disconnect switches are managing a distribution network, shifting loads across the network, interrupting power while maintenance occurs or to turn off an area of the network if there is a safety threat.
You may have heard about lockout tagout systems which are commonly used with disconnect switches. Lockout tagouts are used to lock the switch so that it cannot accidently be turned back on and tagged so that people know who locked the switch, when and why.
Most disconnect systems are designed to be manually operated. There are options available, including keys, to make sure the user really wants to activate the switch.
Marshall Wolf Automation has a number of disconnect switches available. We are your authorized industrial automation distributor for a wide range of disconnect switches including enclosed disconnect switches, as well as fusible and non-fusible versions.
Our disconnect switch manufacturers include Altech and EE Controls.