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Abb Schweiz Ag

Matti Rajala

Aki Suutarinen

Juri Fredlund

Rainer Kolmonen

Timo Jokiniemi

Patrik Rabb

Anu-Riikka Mäki

Marko Pylkäs

Marko Takala

Markus Lönn

Raimo Sillanpää

Tero Kentala

Marko Pylkas

A utilization unit of an electric switch includes an actuator module which includes actuators and power transmission apparatus to operate the electric switch, a power module which includes power supply means for the actuators of the actuator module, a control module which includes control means to control the power module, and data transmission means. The actuator module, the power module, and the control module constitute a modular structure, wherein the power module and the control module are detachably connected to each other and the actuator module so that the power module and the control module are both separately replaceable in the utilization unit.

Utilization unit of an electric switch

Electric switch

Panel for transfer switch

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

Matti Rajala