CONNECTION CONTROL OF CIRCUIT BREAKERS – FIRE PREVENTION

Abstract

An analysis of the emergency operation of electrical networks in old buildings was carried out, in which the saturation of the premises with technical life support systems has increased, as a result of which the load of electrical networks has increased, which exceeds the calculated values and causes frequent emergency shutdowns of the electrical network by previously installed circuit breakers. In addition, the operation of circuit breakers in aggressive conditions may violate the permissible current level established for disconnecting consumers. In this case, it is necessary to replace the outdated electrical network with a new one, replace faulty circuit breakers with new ones. Such work requires material costs, so some electricians use the dangerous method of parallel connecting an additional group of contacts to the main group of contacts. To avoid this, it is necessary to establish standard maintenance periods for circuit breakers, prohibit the connection of the contact terminals of circuit breakers with external and internal conductors to change the value of the maximum trip current of the electrical network.