DEVICE FOR DIAGNOSTICS OF CONTACTS OF POWER ELECTRICAL EQUIPMENT Russian patent published in 2018 - IPC G01R31/04 G01D5/00 

FIELD: electricity.

SUBSTANCE: invention relates to fire alarm signalling means and can be used, in particular, in shipbuilding to prevent the fire danger of ship electrical equipment potentially exposed to intentional power electromagnetic influences. The device for diagnostics of contacts of power electrical equipment contains groups of diodes connected to pairwise interacting groups of contact parts of this equipment, a voltage indicator, connected to these diodes with an output, connected to the alarm signal shaper of the diagnostics system. In this case, the diodes are connected to the contact parts of one of the pairwise interacting groups by one pole, and to the contact parts of the other by the other pole, the opposite poles of the diodes of each group are connected to each other and connected to the polarity corresponding voltage inputs of the voltage indicator. To the contact parts of one of the pairwise interacting groups, the diodes are connected through pairs of metal lobes cantilevered on the electrical heat insulator. At least one of the lobes is made of thermos-bimetal with active and passive layers. The lobes are made with the same length of the console part and installed at a distance equal to the value of the first lobe end offset during its heat deformation, corresponding to the value of recorded temperature. Armature of heat-resistant material can be installed at the interacting ends of the lobes.

EFFECT: invention makes it possible to reduce the consequences of destructive influence of potential means of intended electromagnetic power influence on ships by increasing the accuracy of contact diagnostics.

3 cl, 2 dwg