Abstract:
The overvoltage protection containing at least one non-linear resistance element, connection points for its connection to the protected circuit and a device for temperature initiated disconnection of a non-linear resistance element from the protected circuit, while the device for temperature initiated disconnection of a non-linear resistance element from the protected circuit contains by means of a heat of the non-linear resistance element disconnectable tight joints created parallel to the current-conductive track and made of leadless solder of required strength but of a worse electrical conductivity, further it contains by means of a heat of the non-linear resistance element disconnectable conductive joints created in the current-conductive track and made of low strength electrical conductive leadless solder.
Abstract:
The invention relates to an overvoltage protection comprising a bracket (1) and at least one slide-in protective member (2) which consists of at least one nonlinear resistor element and it further comprises a device for disconnecting the nonlinear resistor element from the mains and at least a part of a device for local and/or remote signalling the state of the overvoltage protection. The invention consists in that there is a sliding member (4) mounted in the body (7) of the slide-in protective member (2) in a reciprocal manner and with a pressure action against a low-melting bond of a cable (10) with an electrode (9) of the nonlinear resistor element, whereas the sliding member (4) is fitted with at least one surface for acting on a visual signalling lever (16) and it is further fitted with at least one surface for acting on a positioning element (3) of the remote signalling mounted in the bracket (1).
Abstract:
The invention relates to a device for a remote monitoring the state of at least a single-pole surge protection which consists of a bracket (1) and at least one slide-in protective member (2) whereas the bracket (1) and also the slide-in protective members (2) are fitted with mechanical devices for detecting the status change of each of the slide-in protective members (2) and the bracket (1) is further fitted with devices for the status change of the switch (4) on the basis of a status change of some of the slide-in protective members (2) whereas the switch (4) is fitted with devices for connecting to the remote conduit of the status change of the switch (4) signal.
Abstract:
The invention relates to the device for overvoltage protection comprising terminals for connection to protected circuit, between which there is arranged the current path, in which the protective element is connected, and in the current path there is created (X) point of intentional cutting off the current path performed through connection of one end of the flexible electric conductor (1) with one end of the fixed electric conductor (2) by means of first solder, and with flexible electric conductor the cut-out device is coupled, while the device further comprises the device for signalling the status of overvoltage protection and an additional thermal cut-out with adjustable parameters of melting. The additional thermal cut-out is performed by a second solder arranged between the flexible electric conductor (1) and the fixed electric conductor (2) parallel to the (X) point of intentional cutting off the current path and outside the joint of flexible electric conductor (1) and fixed electric conductor (2) by means of the first solder, while the second solder is at least thermally conductively connected with the flexible electric conductor (1) and with the fixed electric conductor (2), and the first solder and the second solder feature the same or approximately the same temperature of melting.
Abstract:
The invention relates to the device for overvoltage protection containing between the pair of connection points L/N and N/L being connected at least one varistor (V1), which is through the thermal activation disconnectable from the protected electrical circuit, while between the pair of connection points L/N, N/L and the connection point PE of grounding there is connected the aerial discharge (2), and the device further incorporates a basic board (4) created as a printed circuit and containing electrically conductive layer forming at least a part of conductive connections between individual elements of the device. The varistor (V1) is with its one contact (K1) attached to the electric conductive layer of the basic board (4), and in the place of connection of outlet (K1) of varistor (V1) to electric conductive layer of the basic board (4) to the electric conductive layer of the basic board (4) by means of low-fusing joint (5) is attached the electric conductive breaking-off body (6), which is by means of electric conductive heat resistant link (8) connected to one outlet of the aerial discharge (2) and is coupled with the put off means (9).
Abstract:
The invention relates to the method of overvoltage protection of direct - current electrical circuits at which in the device for overvoltage protection the current path in the point (X) of intentional cutting off the current path is disconnected. During cutting off the current path in the point (X) the value of electric current is limited, through which occurrence of uncontrolled electric arc between the current path parts being disconnected is suppressed. The invention also relates to the device for overvoltage protection of direct current electric circuits which comprises contacts (00) for connection of electric conductors of protected circuit, between the contacts (00) there is arranged the current path with at least one varistor (1), between the varistor (1) and one contact (00) there is created the point (X) of intentional cutting off the current path to which is assigned thermal initiated cut-out mechanism (3) with spring- loaded moving action member and to which a capacitor (16) is assigned in a parallel manner.
Abstract:
The invention relates to the device for overvoltage protection comprising a terminals for connection to protected circuit, while between the terminals there is arranged a current path in which a protective element is connected, while in the current path is created a place (X) for purposeful cutting-off of the current path and to the place (X) of purposeful cutting-off of the current path there is assigned the device for signalling of protection status. In the place (X) of purposeful cutting-off of the current path there is formed an additional fusible thermal stop with pre-set parameters of melting-down, while the elements of current path being purposefully disconnected are connected by means of first solder (21) and the additional fusible thermal stop is formed by a second solder (22), while the second solder has the same or approximately the same temperature of melting as the first solder (21) and the second solder (22) has a lower value of thermal conductivity than the first solder (21).
Abstract:
The invention relates to the overvoltage protection with status signalling, which contains at least one non-linear resistance element with cut-off device coupled with status signalling device of overvoltage protection. The overvoltage protection contains a single cut-off device which is equipped with means for at least two-stage shift of an actuator depending on temperature of non-linear resistance element, while the actuator is coupled with signalling device of step shift of the actuator.