EFD3â€¦ three-pole magnetothermic overload cutouts are used to control (start/stop) and to protect three-phase motors. The switch has adjustable magnetothermic protection and external control. It is made of a special material that makes it suitable for chemically aggressive environments, such as the offshore. EDF-3â€¦ series control and signalling units consist of a UNI 4514, UNI 3051 or UNI 3599 copper-free aluminium alloy rectangular enclosure with stainless steel bushes and pins for the buttons. All the necessary parts of the frame are made of aluminium and the standard paint is Ral 7035 epoxy. The neoprene seals are resistant to temperatures between -30Â°C and +200Â°C. All the screws are 8.8 min. quality and made of stainless steel.