Abb Research Ltd.

Abb Oy

Abb Stromberg Kojeet Oy

Erkki Rajala

Timo Jokiniemi

Ralf Str&uuml;mpler

Joachim Glatz-Reichenbach

Markku Talja

Simo Pöyhönen

JinRui Cao

BaiQin Liang

Jorgen Skindhoj

Esko Kiiskinen

Mikael Nåhls

Arto Makkonen

Petri Solanti

Jouni Ik&auml;heimo

Erkki Leskel&auml;

Martti Varpela

Mikael Nahls

Risto Kajan

Erkki Leskela

Motorized change-over switch

This publication discloses a switching device combination for capacitive loads () connected to a direct voltage. The switching device combination includes an actual switch component () for connecting voltage to the capacitive load (), a charging switch component () for connecting charging voltage to the capacitive load in the initial stage, which charging switch component is dimensioned for a lower current than the actual switch component (), a controller component (), by means of which the actual switch component () is controlled from an open state to a closed state and vice versa, with the aid of a mechanical lever (), which is connected to a first shaft (), and delay elements () for delaying the connection of the actual switch component (), so that the closed charging switch component () will have time to charge the capacitive load () before the connection of the actual switch component (). According to the invention, the controller component () includes a second shaft (), which is operationally connected to the first shaft, in order to control the charging switch component ().

Switching device combination for capacitive loads connected to direct voltage

The invention relates to an apparatus for limiting an electrical current by using a PTC resistor being monitored by a monitor circuit. According to the invention, the monitor circuit issues a signal only after detecting the status of the PTC resistor for a defined time period after a PTC resistance change.

Apparatus for limiting an electrical current

A system having an electric machine, memory device for storing information concerning the electric machine and is attached to the electric machine, and at least one control unit for controlling the operation of the electric machine. Furthermore, the system of the present invention has an interface between the memory device and the at least one control unit so that the at least one control unit reads the information stored in the memory device. The control unit processes the information read from the memory device such that the information becomes verified with default parameters of the system after read-out-thereof. In case the information includes parameters, which do not match in a predefined manner with the default parameters, the control unit is arranged to either automatically, adjust the system in accordance with the information received from the memory device or to prevent start-up of the electric machine or the entire system.

Arrangement and method for an electric machine

An electrical monitor circuit in which star points of taps on a first and a second side of a three-phase current limiting device are voltage compared. Possible applications are combinations with electrical switches, especially for power supplying and protecting circuits for electrical motors.

Monitor circuit for a current limiting device

A description is given of a PTC polymer element (,) as part of an electrical component with a novel structure in which aperture angles (&agr;) on both sides of constrictions (,) in the PTC polymer material are at least 100&deg;. As a result, an improved response behavior can be achieved, and, in connection with further features, the construction of PTC polymer elements which are more rapid, capable of carrying greater currents and have higher dielectric strengths is possible.

Electrical component with a constriction in a PTC polymer element

Electronic auxiliary contact for a contactor

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Vaasa, Finland

Erkki Rajala