By Topic

Application of numerical field simulations for low-voltage circuit breakers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
M. Lindmayer ; Inst. of Electr. Power Syst., Tech. Univ. Braunschweig, Germany ; H. Stammberger

The increasing performance of computers makes it possible to perform numerical simulations of several field distributions and the force on various parts of switchgear equipment. This paper firstly deals with numerical two- and three-dimensional finite element method (FEM) calculations of the magnetic field and forces in current-limiting miniature circuit-breaker systems. Examples are presented for the transient calculation of forces on the plunger of a magnetic tripping coil under consideration of the influence of eddy currents in the plunger. Magnetic blast forces caused by current loops and ferromagnetic parts in the circuit breaker are calculated for transient three-dimensional (3-D) models as well as for different 2-D and 3-D simplifications. A comparison shows that a combination of a 2-D transient analysis for the influence of the attractive force of ferromagnetic parts and a 3-D static analysis yielding the force of current loops gives satisfactory results with the advantage of less computing time and modelling effort as compared to the full 3-D transient model. The equations of motion for the parts of the breaker involved in the tripping and contact opening process are solved using the results of the transient calculations of the plunger force. The second part of this paper deals with temperature distribution and the current-voltage characteristics of arcs in rectangular channels by the use of finite difference method (FDM) discretization. Static arc voltages over a wide current range from 3 to 300 kA are presented, and the dynamic back-commutation out of a de-ion grid is simulated

Published in:

IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part A  (Volume:18 ,  Issue: 3 )