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ASBSM4-LED3 датащи(PDF) 144 Page - Lumberg |
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ASBSM4-LED3 датащи(HTML) 144 Page - Lumberg |
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144 / 178 page ![]() 1-717-217-2299 www.lumberg-automationusa.com 144 Current (I) This is the rate in which electricity is transferred. Practical unit is the ampere, which represents the transfer of one coulomb per second. In a simple circuit, current (I) produced by a cell or electromotive force (E) when there is an external resistance (R) and internal resistance (r) is: I = E / ® + r). Current Carrying Capacity The maximum current a conductor can safely carry without exceeding its insulation and jacket temperature limitations. Current Surge This is a short-term (transient) condition causing a larger than normal amount of current to flow through a conductor. A current surge can often cause damage to an electrical device if it is not properly protected. Cut-Through Resistance The ability of a material to withstand mechanical pressure, usually a sharp edge or small bend radius, without separation. D dB (Decibel) Used to express acoustical power. DC (Direct Current) Electrical current that flows in one direction only. Dielectric Strength The voltage that an insulator can withstand before breakdown occurs. Usually expressed as a voltage gradient (such as volts per mil). DIN (Deutsches Institut fur Normung) The German Standardization Institute. DIN 43650 A German standard, stating the characteristics and requirements of connectors for magnetic valves used in hydraulics and pneumatics. Diode This is a solid-state electronic component, which will allow current to flow in only one direction, similar to a check valve used in hydraulic or pneumatic applications. The diode is used in applications such as transient suppression, power supply circuits etc. Direct Current (DC) The flow of electrical current in one direction. Drain Wire In a cable, the bare wire laid under a metallic foil or braid and is used as a ground connection. Distribution Box Sometimes referred to as Junction or Multi Box is designed to distribute a signal to multiple locations. E E The symbol for Voltage or electromotive force. Earth The British term for zero voltage reference. EFP (Electronic Field Production) Video production, non-news production, done outside the studio. EIA Electronic Industries Association – formerly RMA or RETMA. Electronic Magnetic Sensor This is a solid-state device, which is used to sense a magnetic field. EMF (Electromotive Force) Voltage EMI (Electromagnetic Interference) ENG (Electronic News Gathering) EPDM (Ethylenepropylenediene Monomer) A material with good electrical insulating qualities. EPR (Ethylenepropylene Copolymer Rubber) A material with good electrical insulating qualities. ETP (Electrolytic Tough Pitch) A copper refining process. EU (European Union Directives) A copper refining process. EV (Electron Volt) Extruded Cable with conductors that are uniformly insulated and formed by applying a homogeneous insulation material in a continuous extrusion process. F ƒ The symbol for Frequency. FAS Fire Alarm and Signal Cable – cable designation. FEP (Fluorinated Ethylenepropylene) A thermoplastic material with good electrical insulating properties and chemical and heat resistance. Fillers Non-conducting components cabled with the insulated conductors or optical fibers to impart roundness, flexibility, tensile strength, or a combination of all three, to the cable. FM (Frequency Modulation) G Gauss (Ga) Unit of measure for magnetic flux density. GHz (Gigahertz) A unit of frequency equal to 1 billion (109) hertz. Ground (GND) An electrical connection between a circuit and earth. Ground Loop A completed circuit between shielded pairs of a multiple pair created by random contact between shields. Also, is an undesirable circuit condition in which interference is created by ground currents when grounds are connected at more than one point. Ground Potential A circuit, terminal or chassis is said to be at ground potential when it is used as a reference point for other potentials in the system. H Hertz (Hz) The unit of measure for frequency in cycles per second. HF (High Frequency) The band from 3 to 30 MHz in the radio spectrum. Hygroscopic Capable of absorbing moisture from the air. I I2R Formula for power in watts, where I = current in amperes, and R = resistance in ohms. ICEA (Insulated Cable Engineers Association) IEC (International Electrotechnical Commission) European Standardization Agency. IF (Intermediate – Frequency) IFB (Interrupted Feed Back) Input A signal (or power) which is applied to a piece of References Glossary of Terms |
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