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Marko Takala

Matti Rajala

Jari Elomaa

Matti Kähkipuro

Marko Pylkäs

Veikko Puumala

Lauri Kettunen

Tommi Forsberg

Pertti Arjanne

Mikko Helminen

Mikko Vehkaperä

Marko Pylkas

A switch assembly () for switching electric circuits comprises a contributory switch (), a main switch (), and a flexible element (). The contributory switch () and the main switch () are connected electrically in series, the contributory switch () and the main switch () each comprise at least one movable contact and the flexible element is connected to one movable contact of the contributory switch, a first contact (), and one movable contact of the main switch, a second contact ().

Switch assembly

An arrangement for monitoring a condition of a direct current voltage circuit including first and second supply poles for forming an operating voltage. A first fuse is connected to the first supply pole, and has a supply pole and an output pole. A second fuse is connected to the second supply pole, and has a supply pole and an output pole. The arrangement can form one or several reference voltages (Ua,Ub,Uc), can form a first measurement voltage (U,U,U,U) between the output pole of the first fuse and the supply pole of the second fuse, and can form a second measurement voltage (U,U,U,U) between the output pole of the second fuse and the supply pole of the first or the second fuse. One or several reference voltages and measurement voltages can be compared to estimate a condition of the first and second fuse, and a comparison result can be indicated.

Arrangement to monitor DC circuit condition

Growing community of inventors

Vaasa, Finland

Marko Takala