Experimental bench for creating primary and secondary signs of short circuit

摘要

The utility model relates to electrical engineering and can be used to experimentally study the influence of short circuit time in electrical conductors on the change in their microstructure. Essence: the experimental stand contains a power transformer, the primary winding of which is connected to the circuit breaker of the stand, and the secondary winding to the voltage control unit the first output of which is through a current transformer, the secondary winding of which is connected to an ammeter, is connected to the jaws of the first o and second keys. The movable contact of the first switch is connected to the second output of the voltage control unit, and the movable contact of the second switch is connected to the first conductor located in the test box. An open flame source is located under the lower part of the test box, and a contact thermometer is connected to its upper part. The stand additionally contains a second conductor located in the test box and connected to the first conductor, an electric stopwatch connected at one input to the movable contact of the first key, and the second to the movable contact of the second key, a short circuit protection unit with a set of fuse links and circuit breakers, the input of which is connected to the second conductor, and the output to the second output of the voltage control unit. Technical result: the ability to create signs of primary and secondary short on the circuit. 1 ill.