Under-Voltage Switch for Use in Harsh Environments

The new UP1 under-voltage switch from Schurter monitors the supply voltage and actuates a trip release when there is an intense drop in voltage or when the supply voltage is interrupted. As soon as the supply voltage returns in full, the machine or equipment does not automatically restart in an uncontrolled manner, but must be consciously switched on again. Using this function, dangerous situations for operating personnel as well as for the surroundings of the device itself can be prevented.

The UP1 is a two-pole circuit breaker with additional under-voltage monitoring that actuates a trip release with a loss of voltage or an intense voltage drop. The breaker is available with rocker actuation for snap-in mounting or with pushbutton actuation for both snap-in mounting and screw fitting. Protection covers against the ingress of dust and spray water, enabling the breaker to be used in harsh environments such as wood, masonry or metal working. The requirement for the use of under-voltage protection arises in applications such as gardening equipment, gardening shredders, floor cleaning and sanding devices and electrical tools such as circular saws, band saws, grinding machines and drills.

Further examples are fuel pumps, coffee-milling devices, fruit-juice squeezing machines and fruit-juice centrifuges. The UP1 under-voltage circuit breaker is configured differently in its hardware for various network supply voltages und must therefore be ordered for the appropriate supply voltage. The rated switching category is AC-1 16A/AC-3 14.5A at AC 240V. The breakers, approved to IEC 60947, UL 508 and CSA 22.2 No.14-95, also contain a horsepower rating.

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