Abb Oy

Abb Schweiz Ag

Abb Research Ltd.

Timo Jokiniemi

Rainer Kolmonen

Patrik Rabb

Aki Suutarinen

Matti Rajala

Juri Fredlund

Anu-Riikka Mäki

JinRui Cao

BaiQin Liang

Erkki Rajala

Janne Rosenberg

Martti Taimisto

Harri Pollari

Ralf Str&uuml;mpler

Joachim Glatz-Reichenbach

Jari Elomaa

Anu-Riikka Vuorinen

Mikael Nåhls

Esko Latvala

A switching device including: a body which has a first side wall and a first end wall, the first side wall being perpendicular in relation to a longitudinal direction, and the first end wall is substantially perpendicular to the first side wall; and a first fixed contact comprising an inner section and an outer section, the inner section having a thickness dimension, the outer section protrudes from the first side wall in the longitudinal direction. The first fixed contact includes a test terminal which is integral to the inner section and protrudes from the inner section in a lateral direction, which is perpendicular to the longitudinal direction and an end wall plane defined by the first end wall, the test terminal having a substantially planar test terminal surface, and the test terminal has a thickness dimension which is parallel to the thickness dimension of the inner section, the thickness dimension of the test terminal is substantially smaller than the thickness dimension of the inner section, the test terminal is accessible from outside the body from the direction of the first end wall, and the test terminal is adapted to be connected to a female connector.

Switching device whose stationary contact is provided with test terminal

The electrical switch includes a first and a second fixed contact, and a movable knife contact including at least one longitudinal pair of blades being flexibly connected to each other, wherein the blades form, in a switching event, contact with contact portions of the first and/or the second fixed contact. Opposite surfaces of the contact portions of the first and the second fixed contact include a roughened area and the inner surface of each blade includes a protruded area or opposite surfaces of the contact portions of the first and the second fixed contact include a protruded area and the inner surface of each blade includes a roughened area.

Electrical switch

Electric switch

Panel for transfer switch

Disconnector

Switch

Motorized change-over switch

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

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

Growing community of inventors

Merikaarto, Finland

Timo Jokiniemi