Showing papers by "Phoenix Contact published in 1992"

Monitoring and safety system for electrical overload - uses varistor that has soldered control terminal that is released when predetermined temp. is reached to operate alarm

Abstract: The monitoring and safety module uses a varistor element (2) that responds to temp. changes to release a spring loaded contact system when a predetermined temp. is reached. The varistor has contact terminals (3,4) coupled to the system being monitored and a projecting contact (6) is soldered to an element (7) that holds a loaded spring (10) under tension. When the applied voltage is such that the varistor temp. is sufficiently high, the solder melts and the stored energy is released to operate an alarm stage. ADVANTAGE - Provides reliable operating point.

Series electrical clamp terminal - has separator between clamp arm and counter bearing arm of spring steel clamp element

Abstract: The clamp terminal has a spring steel clamp element (1) for clamping an inserted electrical lead fitted in an insulating clamp terminal housing (3). The latter has a reception space (4) for the clamp element and an insertion opening (5) for the lead which is engaged by a counter bearing arm (8) of the clamp element. A relatively movable separation element (12) fits between the counter bearing arm (8) and the spring clamp arm (9) of the clamp element, with respective conductors fitted between each of the arms and the separation element. ADVANTAGE - Simple clamping of two adjacent conductors.

Overvoltage protection element for telecommunication circuits

Abstract: An overvoltage protection element comprises at least two plate-shaped electrodes (1) and a spark gap between them. In this gap, to release a flashover, there is an ignition aid (4), which occupies only a small part of the space. It is shaped like the web of a beam and acts at the same time as a spacer between the electrodes. It is made of plastic with low resistance to surface leakage currents. This plastic releases electronegative gas under the influence of an arc. All together, there may be three such elements between the electrodes, distributed at 120 degrees to each other. There may be a third electrode (5) at a different distance from the second electrode compared to the first one.

Overload voltage protector e.g. for use with control and instrumentation equipment - has modular structure with overload elements in housing interconnected by bridging strips.

Abstract: The protection system is produced as a module with at least two types of element. Typically, the elements can be an arcuate path, inductance, resistance or varistor. Each may be housed side by side in a two section housing (3) having a base (13) and cover (11). Interconnections are provided by metal coupling plates (10) that can be located on both sides. Terminal screw clamps (2) are built in. ADVANTAGE - Simple structure providing flexibility in form.

Bus=bar providing strip connection for cable - has two detachable side terminal blocks mounted on central terminal block attached to carrying rail

Abstract: A cable connector has at least two terminal side blocks (1), joined electrically and mechanically, on either side of a central block (5) The cables are attached to the blocks by screws The whole unit sits on a carrying rail (6) The side blocks can be removed from the central block, the attachment (11, 12) being an array of mating grooves with springs The blocks are made from insulating material, the electrical connection between the individual cable terminations being via a common bus-bar Further grooves (14) in the central block are available for cable identity tags ADVANTAGE - Proof against electric shock during mounting under any circumstances including retrofitting

Electrical strip terminal connector - has additional recess(es) for further collector rail(s) connectable to common current bar via screw

Abstract: An electric clamping terminal has terminals arranged in a row on a carrier bar (1). The arrangement has an isolating housing (2) for the terminals contg. at least one lead connector body of metal. At least one current bar (4) is electrically connected to the connector body. At least two holders (5, 8, 9, 10) in the housing (2) are open on one side and also in the upper part perpendicular to the neighbouring terminal. Collective rods (6, 11, 12, 13) are insertable in connected holders (5, 8, 9, 10). These rods are electrically connectable, by a connector element (7), e.g. a screw, to the current bar(s) (4). An isolating distance (A) is provided between the collective rods and the current bar(s). The electrical connection can, therefore, only be made via the connector element (7). ADVANTAGE - Can be of any desired type and can be associated with any desired collective bar and varied as desired.