Abstract: A passive device for protection of the electrical junction box of a low voltage (LV) power supply to a building from undesirable elevated temperature or flame burns. The device includes a tank (5) with extinguishing medium, a plunger (6) that includes a seal for sealing the extinguishing medium in the extinguishing medium tank (5), a NC contact (4) attached to the upper part of the plunger (6) and made from electrically conductive material, a thermal fuse (7) attached to the upper part of the plunger (6), and a protective frame (8) arranged above the thermal fuse (7), wherein the passive device for protection of the electrical junction box is arranged in the first part (10.1) of a carrier (10), and in the second part (10.2) of the carrier (10) a fuse is arranged in the fuse base (1).

Abstract: A transmitter (“T”) in a protected area connected to an electrical circuit of an electrical distribution box in which is a receiver (“R”). The T includes a cooling medium carrier (“CMC”) with a fire extinguishing effect A communication control unit The CCU includes a temperature or smoke or a light spectrum sensor, an RF transmitter for wireless communication between the T and the R, a control LED for setting and pairing with the R. The R includes a power supply, at least one LED for setting the pairing with the T, at least one LED for monitoring an error of the T arranged in the protected area, and RF receiving components for wireless communication. A disconnector disconnects the protective area as a rising temperature is detected from the power source. The system identifies a containment compartment with the CMC that is damaged.

Abstract: The compact cooling and extinguishing system is designed to be arranged in a protected device, in particular electrical switchboards with a DIN rail, wherein the compact automatic cooling and extinguishing system consists of a carrier (14) containing inside a pressurized cooling and extinguishing medium, wherein the medium is based on chemical extinguishing agents, which are characterized in that during initiation their temperature, when escaping the carrier, is in negative values, i.e. temperature below 0° C.