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--- wiki:cmp:circuit_protection:surge_arresters:start [2023/05/19 16:43] – Roman Abakumov
+++ wiki:cmp:circuit_protection:surge_arresters:start [2024/01/21 16:26] (текущий) – Roman Abakumov
@@ Строка 1: / Строка 1: @@
 ====== Surge Arresters (Разрядники) ======
 ===== Manufacturers =====
-| Bourns | |
+---- datatable ----
-| TDK\EPCOS | https://www.tdk-electronics.tdk.com/en/arresters |
+cols    : %title%, country, descr_wiki, link_url, status, tags_tags
-| Littelfuse | |
+headers : Manufacturer, Country, Description, link, status, Tags
-| BrightKing | |
+filter  : %class%=manufacturers
+filter  : tags_tags~~surge-arrester
+sort    : %title%
+----
 | RUICHI | |
 | CITEL | http://www.tecnorayos.com/pdf/3.CAPSULAS%20GASEOSAS%20CITEL.pdf |
@@ Строка 10: / Строка 14: @@
 | LEUTRON  |  |
 | OBO Bettermann  |  |
-| Phoenix Contact  |  |
 | RST  |  |
 | ГРОЗОЩИТ  |  |
@@ Строка 21: / Строка 24: @@
 https://www.symmetron.ru/catalog/passivnye-komponenty/razryadniki/
+===== Theory =====
+The main electrical characteristics defining a gas discharge tube are:
+  * DC sparkover voltage (Volts)
+  * Impulse sparkover voltage (Volts)
+  * Discharge current capacity (kA)
+  * Insulation resistance (Gohms)
+  * Capacitance (pF)
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-inside-3pin.jpg?320}}
+==== DC sparkover voltage ====
+This is the main characteristic defining the gas discharge tube.
+It is the voltage at which breakdown will occur between the
+electrodes when a slowly increasing voltage (dV/dt = 100 V/s) is
+applied to the component; it depends on the electrode spacing, the
+pressure, and the properties of the gas mixture and of the emissive
+substance.
+Range of DC sparkover voltages available:
+  * minimum 75V
+  * average 230V
+  * high voltage 500V
+  * very high voltage 1000 to 3000V
+The tolerance on the breakdown voltage is generally ± 20%.
+==== 3-electrode configuration ====
+Protecting a two-wire line (for example a telephone pair) with two 2-
+electrode gas discharge tubes (connected between the wires and
+ground) may cause the following problem:
+The line is subjected to an overvoltage in common mode; because of
+the dispersion of the sparkover voltages (± 20%), one of the gas
+discharge tubes sparks over a very short time before the other (a
+few microseconds); the wire that has sparked over is therefore
+grounded (neglecting the arc voltages), turning the common-mode
+overvoltage into a differential-mode overvoltage, very dangerous for
+the terminal equipment. This risk disappears when the second gas
+discharge tube arcs over (a few microseconds later).
+-electrode geometry eliminates this drawback: the sparkover of one
+pole causes a "general" breakdown of the device almost
+instantaneously (a few nanoseconds) because there is only one gasfilled enclosure.
+==== End of life ====
+Gas discharge tubes are designed to withstand several impulses
+without destruction or loss of the initial characteristics (typical
+impulse tests: 10 times 5kA impulses of each polarity).
+On the other hand, a sustained strong current (e.g. 10A rms for 15
+seconds, simulating the fall of a power line onto a
+telecommunications line) will put the device out of service definitively.
+If a fail-safe end of life is desired (i.e. a short-circuit that will report
+the fault to the user when the line fault is detected), gas discharge
+tubes with the fail-safe feature (external short-circuit) should be
+chosen.
 ===== Radial - TH =====
 ==== 2-PIN ====
-| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th.jpg?320}} |
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th.jpg?320}}
+[[https://www.tdk-electronics.tdk.com/download/531256/80440536d8bce5a6480d734d037cc4d6/pdfmounting.pdf|Mounting]]
 ==== 3-PIN ====
-| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th-3pin.jpg?320}}
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th-3pin.jpg?320}}
 ===== SMD =====
 ==== 2-PIN ====
-| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd.jpg?320}} | {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-brick-2pin.jpg?320}} |
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd.jpg?320}}
-| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-disk-smd.jpg?320}}   | |
-==== 3-PIN ====
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-disk-smd.jpg?320}}
-| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd-3pin.jpg?320 }} |
+{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-brick-2pin.jpg?320}}
 | Bourns | 2051-09-SM-RPLF |                 | (4.5x3.2x2.7mm 90V +30% 2kA/2A), SMD 2.7x3.2x4.5mm 90V +30% 2kA/2A. |
 | Epcos  | M50-C90XSMD     | B88069X1640T902 | (5.4x5mm 90V +20% 10kA/5A 2-х элек. SMD M50-C90XSMD), 5.4x5mm 90V +20% 10kA/5A 2-х элек. SMD |
+==== 3-PIN ====
+| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd-3pin.jpg?320 }} |

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