Altech Rolls Out Dual Voltage-Rated AC/DC Disconnect Switches

Altech Corporation has released two new disconnect switch series, the LSF and RT. These switches are built to turn power off and on and are rated for both AC and DC power. Both series are built for base and DIN-rail mounting, making them easy to integrate into existing hardware in a retrofitting project or to include in a new machine build. 

The LSF and RT series of dual voltage-rated AC/DC disconnect switches for base and DIN rail mounting. Image used courtesy of Altech Corporation

Dual-Rated AC/DC Disconnect Switches

The LSF and RT switches are rated up to 600 V AC and 60 V DC, meaning the same switch can be used for either AC or DC systems. Depending on the specific model, these switches are available in 16 A, 30 A, and 40 A configurations.

The primary difference between the LSF and RT switches is the physical switching mechanism and the user experience. For the LSF models, an external handle extends beyond the switch body, and an interlock prevents the power from being switched on when the box is open.

The RT models have a knob control that is designed to integrate with existing panel hardware, requiring only a standard 22.5 mm hole to be drilled into the panel. Altech has designed the RT series for applications where only a local shutoff is required, without shutting down the entire system. Some RT models can be mounted on doors for this purpose; the technician can turn the switch and disconnect power to the local area before opening the door and performing maintenance work to the system, without shutting down other processes.

The LSF and RT disconnect switches are dual voltage-rated for both 600 V AC and 60 V DC. Video used courtesy of Altech Corporation

Simple Installation, Durable Design

The switches’ silver contacts allow maximum current flow with little voltage drop across the switch when it is closed and current is flowing. Also, the contacts are spring loaded. This way, when the switch disconnects, there is less DC arcing across the contacts, fewer spurious emissions on the electromagnetic spectrum (EMI) and reduced damage from arc flash. Many disconnect switches overlook this problem, and the contacts are chipped away by repeated arc flash damage.

All switches are simplistic in their design and operation, with only a few moving parts. The switches are built for base and DIN-rail mounting, making them simple to install. The LSF models have wiring connections on the front of the switch body, and the RT models have wiring connections on the back of the body. The switch body itself is made from a high grade plastic that resists vibration, chemical attack and other physical hazards. Both switch designs are UL 60947-4-1 certified, testifying to their safe, reliable design.

A door-mount version is available for the RT series, featuring a knob attached to the panel front that can be installed via a 22.5-mm push-button panel hole. Image used courtesy of Altech Corporation

Industrial Automation Solutions

Altech’s new dual-rated switches can be used in numerous applications across all market segments of industry. No longer does a robot builder need separate switches to control AC power versus DC power, as the same switch can handle either one. The LSF/RT series and their robust packaging also enhance safety by preventing arc flash injuries and damage during shutdown. The spring-loaded disconnects extend the life of these switches, meaning they are built to last the lifetime of the rest of the automation system.