SURGE PROTECTION / LSA TECHNOLOGY

Table of Contents Introduction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Definition and properties.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Gas discharge tubes, 2-pole 2EH series.. . . . . . . . . . . . . . . . . . . . . . . 8 2EJ series. . . . . . . . . . . . . . . . . . . . . . . . 10 2EL..Q series. . . . . . . . . . . . . . . . . . . . . 12 2EM series. . . . . . . . . . . . . . . . . . . . . . . 14 2EU series (part 1).. . . . . . . . . . . . . . . 16 2EU series (part 2).. . . . . . . . . . . . . . . 18 2EY series. . . ....

Surge arresters Introduction Gas-filled discharge tubes (GDT) Atmospheric discharges, inductive interferences, frictional electricity or direct contact with high-voltage conductors can provoke short-term voltage surges which are coupled into telecommunications lines or any kind of process measuring and control lines and which, as a result, disturb or destroy the electric or electronic installations connected to them. Voltage surges occurring in AC current systems are caused by the ever increasing strain on power supply units, our growing use of phase-control systems,  connecting by operations...

high temperatures. The metallic/ceramic bodies thus hermetically sealed are then filled with a special rare gas blend (Argon, Neon etc.) at a precisely calculated pressure. These rare gases and their blending ratio ensure optimum electrical characteristics throughout their service life. This type of arrester can be used instead of two 2-electrode arresters. It consists of a slightly longer ceramic cylinder with two metallic electrodes and a ring electrode situated surge voltage protection magazines offered by various manufacturers pluggable 3-electrode button arresters with pluggand solderable...

The following conditions must be met: • DC operating voltage is either below the minimum arc voltage or below the glow voltage level. • In the latter case make sure that the maximum current drawn from the operating voltage source is incapable to maintain the arc discharge mode after the surge has subsided. Note In AC current systems, the arrester usually does not extinguish after discharge of the voltage source, as the duration of the zero-crossing of the AC voltage is not long enough to effect a complete de-ionizing of the discharge path, potentially leading to inadmissibly high short-circuit...

DC spark-over voltage Vsdc: DC spark-over voltage, also called static spark-over voltage, is the value at which a gas-filled arrester ignites up to a specific voltage rise of for example dv/dt < 100 V/ms. The voltage rise necessary to test the static spark-over voltage of an arrester can therefore be 100 V/ms or less. over voltage will static spark-over gas-filled surge Below this value, DC, AC and HF voltages can be applied without creating an influence or a current flow in the Impulse spark-over voltage: The impulse spark-over voltage, also referred to as dynamic spark-over voltage, is the...

Gas-filled surge arresters Terms according to VDE 0845 and test standard ITU-T K12 of International Telecom Union DC spark-over voltage Vsdc Measuring value for applied voltage rise rates of 100 V/s. Leutron‑ arresters offer low tolerances of ~15 % to 20%. Impulse spark-over voltage vsi Typical measuring value for applied voltage rise rates of 1 kV/µs. Leutron-arresters respond quickly and reliably. The indicated values are based on statistic assessments. Nominal impulse discharge current idiN Peak value of the maximum admissible 8/20 current impulse (8µs time to rise and 20µs time to half-value)....

button type arrester button type arrester with Fail-safe High quality industrial ceramics Filled with inert gas, hermetically sealed No radioactivity! High impulse current resistance 10kA Highly reliable Stable functioning Long service life Description LEUTRON gas tube surge arrester series 2EH are hermetically encapsulated medium duty high performance spark gaps, in metal/ceramics execution, filled with inert gas. With or without Fail-safe. 10kA/10A M edium Duty Arrester with lead wires Application Used as a classical primary medium protection for Telecom distribution frames (MDF), railways...

Specification: / execution Button type arrester, pluggable, surface Ni-plated Button type arrester, pluggable, surface Ni-plated, + external Fail - safe 2EH 90Q 95 10 17 With tin-plated lead wires Remark: - other voltages and executions on request Technical data Terms in accordance with: ITU – T K12. / DIN 57845 / VDE 0845 / CEI - IEC 61647 – 1 / IEEE C 62.31 Nominal DC spark-over voltage Impulse spark- over voltage, typical value Nominal impulse discharge surge current Single impulse discharge surge current Nominal alternating discharge current Impulse life Glow voltage Glow-to arc transition...

• 08xL8mm . Heavy Duty Arrester button type arrester > High quality industrial ceramics • filled with inert gas, hermetically sealed > high impulse current resistance 20kA • stable functioning 1 long service life LEUTRON GDT series 2EJ are hermetically encapsulated high performance spark gaps in metal/ceramics execution, filled with inert gas. Used as a classical primary protection forTelecom overhead lines, railways and applications where a higher lightning protection is required. To be used in 8 x 8mm 2-pole arrester magazines and

Specification: Execution Button type arrester, pluggable, surface Ni-plated Remark: - other voltages and executions on request Technical data values according to: ITU – T K12. / DIN 57845 / VDE 0845 / CEI - IEC 61647 – 1 / IEEE C 62.31 Nominal DC spark-over voltage UagN VsdcN Impulse spark- over voltage, typical value Nominal impulse discharge surge current Single impulse discharge surge current Nominal alternating discharge current Impulse life Glow voltage Glow-to arc transition current Insulation resistance Capacitance Climatic category, relative humidity DIN IEC 60068 - 1 Operating / storage...