METHOD AND APPARATUS FOR THE MEASUREMENT OF A RESISTANCE OF A SWITCHING CONTACT OF AN ELECTRICAL CIRCUIT BREAKER

摘要

The method involves determining a resistance value across an electrical power switch (11) while the power switch is grounded at both sides and a switching contact (16) is closed. Another resistance value across the power switch is determined while the power switch is grounded at both sides and the switching contact is open. Resistance of the closed switching contact is determined based on the resistance values. The resistance values are determined by impressing direct current in the power switch and measuring voltage across the power switch. Independent claims are also included for the following: (1) a device for measuring resistance of a switching contact of an electrical power switch (2) a test environment for measuring resistance of a switching contact of an electrical power switch.