Phoenix Contact Gmbh + Co. Kg

Jens Willmann

Frank Welzel

Martin Wetter

Steffen Pfoertner

Christian Birkholz

Gerhard Wolff

Peter Bäckeralf

An overvoltage protection device includes: input terminals; output terminals; at least two overvoltage protection elements for forming staggered protection levels; and at least one longitudinal element electrically connecting an input terminal and an output terminal to conduct an operating current. In order to form a first protection level, a first overvoltage protection device is connected to two input terminals on an input side upstream of the at least one longitudinal element, and, in order to form a second protection level, a second overvoltage protection element is connected to two output terminals on an output side and downstream of the at least one longitudinal element, the at least one longitudinal element influencing a response of the at least two overvoltage protection elements in case of an overvoltage. The at least one longitudinal element is provided with a thermal overload protection device for reducing a possible current flow.

Overvoltage protection device with thermal overload protection device

An overvoltage protection device for protection of an electrical or electronic device, with a housing, with input and output terminals for electrical conductors, with line paths which each connect one input terminal to one output terminal, with first arresters which are used for symmetrical protection between the active conductors and with second arresters which are used for asymmetrical protection between the individual conductors and the ground potential, the individual first arresters each being connected by their first terminal to a line path and by their second terminal to a common connecting point so that they are at a common reference potential and symmetrical protection between two conductors is implemented by two first arresters located in series to one another. The overvoltage protection device can also be used in signal circuits with several signal conductors and can guarantee reliable protection of a connected electrical or electronic device against overvoltages.

Overvoltage protection device

A combination circuit board and clamping device includes a circuit board having a conductor strip that conducts electrical voltage. A connection for a shielded cable with a device to clamp the cable sheath is provided on the circuit board. This device is in contact with the conductor strip carrying the electrical voltage. The clamp device for the cable sheath consists of a contact piece with a metallic base plate and clamp springs that project on one side and are separated from one another, between which the cable insulated up to the cable sheath is received. The circuit board includes pass-through apertures into which to insert these clamp springs, and the contact piece with the cable end secured between contact springs is attached to the circuit board by means of a cable binder, for whose proper positioning the circuit board includes openings.

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Buende, Germany

Jens Willmann