The sixth webinar of "Surge protection" series
Webinar text. Page 4
Fast navigation by slides:
1. Limiters by RST
2. About Miroslav Zelenkevich
3. Plan of presentation
4. Sources of damages
5. Types of damages - D1: shocking living beings
6. Types of damages - D2: physical damage
7. Types of damages - D3: damage to internal systems
8. Lightning risk analysis as per IEC 62305
9. Lightning protection levels
10. Discharge protection means
11. Zonal protection concept
12. Introduction into the surge protection
13. Zonal protection concept principles
14. Normalized current pulses
15. Production of RST limiters
16. RST Limiters production stages
17. Surge limiters testing
18. Execution of documentation
19. Type tests as per IEC 61643-21
20. Test scope as per IEC 61643-21
21. Voltage limiter requirements
22. Categories of stability
23. Pulse tests in the laboratory RST
24. High-energy impact test
25. Climatic tests
26. Test oscillograms
27. Determination of limiter nominal parameters
28. Substantiation of tests
29. Example of parameters given by manufacturers
30. Parameters of SPD from other manufacturers
31. Example of factory test parameters
32. Example of gas limiter
33. Results before and after testing
34. Complete scheme resistance test
35. Temperature resistance test results
36. Correct parameters of limiters as per IEC 61643-21
37. Technical data of limiters
38. Surge limiters by RST
39. RST Guard series limiters
40. RST Guard surge protection device
41. RST Guard HF SPD
42. RST Guard S SPD
43. RST Guard RS485 SPD
44. RST Guard GDT and RST Guard Audio SPDs
45. RST SAP SPD
Page 4:
46. Nominal voltage of SPD
47. RST AL series limiters
48. Table with voltage parameters
49. RST AL HDC SPD
50. RST AL RS SPD
51. RST AL HF SPD
52. RST NET and RST CCTV BNC-1 SPDs
53. RST NET PoE SPD
54. RST CCTV BNC-1 SPD
55. CCTV SPD
56. ZOP overvoltage protection circuits
57. RST TV camera protection circuit
58. Circuits identification code
59. Damage alarm
60. RST AL TMP alarm module
61. Robotic arm protection circuit
62. Central unit protection circuit
63. Control systems protection circuit
64. Individual protection of hardware
65. Protection at LPZ zones boundaries
66. Protection of control cabinets
67. Telecommunication systems protection circuit
68. Railway automatics systems protection circuit
69. Line power supply circuits
70. Numerical coded circuit blocking
71. Buzzer circuit blocking
72. RST surge limiters for signals and interlocking system
73. Additional funding from European Union
74. IsoPro B TN-C
75. Elementary base for signals and interlocking system
76. Elementary base for signals and interlocking system (continued)
77. Table of technical parameters
78. SPD selection parameters
79. Thank you for attention
Nominal voltage of SPD
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УЗИП RST SAP |
RST SAP SPD |
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УЗИП RST SAP преднозначенные для защиты систем нуждающихся в минимальным вносимом в линию сопротивлений и с большим номинальным током, таких как цепи систем пожарной тревоги:
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RST SAP SPD designed for the systems requiring the minimum insert resistance in the line and high nominal current, such as fire alarm system circuits:
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Технические параметры |
Technical parameters |
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Уровень напряжения защиты |
Protective voltage level |
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Линия-линия |
Line-line |
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Граничная частота 3 dB |
Limit frequency 3 dB |
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DIN рейка 35 мм |
35 mm DIN rail |
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для |
for |
— Let us look at the parameters of these SPDs, there are following nominal voltages: 12 V, 30 V, 36 V, 48 V. Various manufacturers use other elements. In terms of the voltage limitation level, we also can see these are low enough. Why it is important in this case? I remember first time, when I faced those fire alarm circuits, when the lightning strike causes monetary damage in the amount of about 20 thousand euro. The main problem is not the money, in those case firemen who worked in that plant, had no information on what occurred, because of total destruction of the system. The elements we offer for the fire systems, have really good quality and meet the requirements for these systems perfectly.
RST AL Series limiters
УЗИП RST AL
УЗИП серии RST AL:
- RST AL DC - защита линий с небольшим током
- RST AL HDC - защита линий с большим током
- RST AL RS - защита щин передачи данных
- RST AL HF - защита сигналов высокой частоты (HF)
- УЗИП предназначенные для защиты систем тревожной сигнализации и контроля доступа
- миниатюрные размеры (модуль 10 x 65 мм)
- номинальные напряжения подобранные для применения в тревожных системах различных производителей
- испытанные по категории C1/C2/D1 согласно IEC / EN 61643-21
- высокая ударная стойкость: Imax = 10 kA 8/20 мкс
Iimp = 2.5 kA 10/350 мкс
- широкий диапазон рабочих температур: -40°C to +80°C
RST AL SPD
RST AL series SPD:
- RST AL DC – protection of low-current lines
- RST AL HDC – protection of high-current lines
- RST AL RS – protection of data transfer buses
- RST AL HF – protection of high-frequency (HF) signals
- SPD designed for protection of security alarm and access control systems
- small sizes (modules of 10 x 65 mm)
- nominal voltages selected for application in security systems of various manufacturers
- tested for categories C1/C2/D1 according to IEC / EN 61643-21
- high impact strength: Imax = 10 kA 8/20 µs
Iimp = 2.5 kA 10/350 µs
- wide range of operational temperatures from -40°C to +80°C
— For those designers, who prefer selecting SPDs by themselves, in case of various sophisticated systems, we made the RST AL range of surge protection devices. It is the series for the alarm systems, when anybody invades the object. Here we can see RST AL DC range for the low-current lines. RST AL HDC is a high current line. RST AL RS is for data transfer buses protection and RST AL HF, as before, for the high-frequency signals protection. These SPDs are designed for protection of the security alarm and access control systems. These feature a small size, namely, about 10mm of the width by 65mm, or 6.5 cm of the length.
Table of voltage parameters
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УЗИП RST AL DC преднозначенные для защиты линии тревожных систем с небольшим током:
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RST AL DC SPD is designed for protection of the alarm systems low-current lines:
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Технические параметры |
Technical parameters |
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Уровень напряжения защиты |
Protective voltage level |
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Линия-линия |
Line-line |
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Граничная частота 3 dB |
Limit frequency 3 dB |
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DIN рейка 35 мм |
35 mm DIN rail |
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для |
for |
— By looking at the parameters summarized in Table, we can see that installation of these elements is allowed at the boundary of zero and first zones, and further. Limitations for the voltage parameters are very low, that is to say these voltages are thoroughly selected based on the nominals. Should we excess this nominal voltage many times, then the energy crossing above the limitation and reaching the protected circuits, will be high. Limit frequency at the level of 2 MHz to 4 MHz, 5 MHz, which is also shall be noted. However, it is quite insufficient in those systems
RST AL HDC SPD
УЗИП RST AL HDC предназначенные для защиты линий тревожных систем с большим током:
- испытанные по IEC/EN 61643-21
- небольшие размеры: 10 x 65 mm
- большой номинальный ток: 2.5 A и serial mass resistance: D.2 Ω
- низкий уровень напряжения защиты линия – PE и линия-линия
- испытанные по категории D1 – использования на границах зон LPZ 0 / LPZ 1 и выше
RST AL HDC SPD is designed for protection of the alarm systems high-current lines:
- Tested as per IEC/EN 61643-21
- small size: 10 x 65 mm
- high nominal current: 2.5 A and serial mass resistance: D.2 Ω
- low protection voltage level of line – PE and line – line
- Tested as per category D1 – for using at boundaries of LPZ 0 / LPZ 1 zones and higher
— HDC elements in this range are for high-current lines. In this case the nominal current is high - 2.5 kA, it is required where alerting devices are included. It is very important not to forget that alerting device is subjected to the current many times higher when it is actuated, rather than in standby mode. Low resistance provides such a high current. We succeeded in coordination of the first and the second protection steps at very low resistance.
RST AL RS SPD
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УЗИП RST AL RS предназначенные для защиты линий тревожных систем: |
RST AL RS SPD is designed for protection of serial data transfer buses of alarm systems: |
— The next element which will be useful for the designers, it is the element for the RS 485 signal standard to protect serial data transfer in alarm systems. Again, it has very low protective voltage: line – РЕ and line – line. It is very important for those signal standard, because it is the voltage that does exist.
RST AL HF SPD
УЗИП RST AL 5 HF преднозначенные для защиты высокочастотных линий тревожных систем:
- испытанные по IEC/EN 61643-21
- небольшие размеры: 10 x 65 мм
- широкий диапозон рабочих частот: до 75 MГц
- испытанные по категории D1 – использования на границах зон LPZ 0 / LPZ 1 и выше
RST AL 5 HF SPD is designed for protection of alarm systems high-frequency lines:
- Tested as per IEC/EN 61643-21
- small size: 10 x 65 mm
- wide operational frequency range: up to 75 MHz
- Tested as per category D1 – for using at boundaries of LPZ 0 / LPZ 1 zones and higher
— This element may also be installed at the boundary of the external and internal zone. RST AL HF for higher frequency of up to 75 MHz. If we look at earlier parameters, this frequency was about 2 MHz. Who needs for higher ones, he will find the element required.
RST NET and RST CCTV BNC-1 SPDs
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УЗИП защиты систем видеонаблюдения ССTV |
CCTV video surveillance systems protection SPD |
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УЗИП преднозначенные CCTV :
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SPD designed for CCTV systems:
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- предложение УЗИП производства RST, которая позволяет подбор УЗИП для защиты всех стандартов промышленного телевидения |
- Offer of SPD by RST allowing selection of SPD for all CCTV standards |
— Other type of SPDs. These are necessary protection elements of any CCTV system. There are many configurations for the existing CCTV systems. Everyone remembers, that such systems began with the signal transfer by coaxial cable, therefore we have relevant elements here. Look, this element has BNC connection, but new standards were adapted and we have developed the elements with PoE IP video supply, by means of coaxial 75 Ω BNC-1 connections, and RST Safe, which are large protection circuits for the video surveillance and video control centers. These SPDs allow selection of protection for any CCTV standards whatsoever existing by now, because we worked very hard on it, and you will find such. RST NET and RST CCTV BNC-1 SPDs for those standards have the maximum signal stability. It is important to focus on stability, based on our profound experience, we understand it very clear, that no cheap elements can be installed in that location, but only well proven ones.
RST NET PoE SPD
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УЗИП RST NET PoE преднозначены для защиты систем CCTV IP совместимый с любым стандартом PoE:
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RST NET PoE SPD are designed for CCTV IP systems protection, compatible with any PoE standard:
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— RST NET PoE includes the elements highly demanded on the market. These let higher frequency passing, therefore we do not expect them to provide a high stability. But we worked hard for a long time and succeeded to meet the sixth category of the signal passing, that is to say we may use the systems for the Internet networks protection. They have the impact resistance against the lightning current pulse of 1 kA, 10/350 µs. Generally, we deal with 500 A and the maximum pulse of 8/20 µs 2.5 kA. It is clear, that this element is not so strength as earlier ones. It is the connection, that limits the level of these currents, because the strength of such connection is low.
RST CCTV BNC-1 SPD
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УЗИП RST CCTV BNC-I предназначены для защиты линий 75 Ом систем CCTV с изоляцией сигнала от земли:
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RST CCTV BNC-I SPD are designed for CCTV 75Ω lines protection, with signal insulation from the ground:
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Линия-линия, линия-экран |
Line – line, line – shield |
— RST CCTV BNC-1 is well-known standard which is proven one. It has high impact strength of 20 kA and 2.5 kA with the pulse of 10/350 µs, which is the peak for the design like that. In terms of the limit frequency of 70 MHz, it allows perfect video signals transmission through a coaxial cable. The element is made of aluminum, it means that these elements do not generate, not transmit the pulses outside, and if the protection is provided inside, there is no shielding function.
CCTV systems protection SPD
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Схемы защиты от перенапряжений центров видеонаблюдения |
Video surveillance centers overvoltage protection circuits |
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RST Safe NET PoE: |
RST Safe NET PoE: |
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RST Safe CCTV BNC: |
RST Safe CCTV BNC: |
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RST Safe CCV/P: |
RST Safe CCV/P: |
— IZOP is for larger protection circuits. What does IZOP stand for? RST Safe NET PoE is intended for protection of one to ten lines, with 19-inch enclosure, the height of 1U and made of stainless steel. RST Safe CCTV BNC for one to 10 lines, 75 Ω in the same enclosure. RST Safe CCTV/P represent modular elements, which you have seen with other enclosure designs, for the protection from 1 to 19 lines of the twisted pair or 9 video + camera control cables.
ZOP overvoltage protection circuits
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ZOP – схемы защиты от перенапряжений |
ZOP – Zone overvoltage protection circuits |
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Zone Overvoltage Protection (ZOP) - схема преднозначенная для монтажа на определённой границе зон LPZ (напр. наружная стена здания - граница LPZ 0/1) или непосредственно у защищаемого устройства (напр. LPZ 1/2), которая в одном корпусе включает в себя УЗИП защищающие все линии (и электропитания и сигнальные) пересекающие в данной точке границу зон |
Zone Overvoltage Protection (ZOP) is a circuit designed for installation at certain boundary between LPZ zones (for example, external building wall – boundary of LPZ 0/1) or directly near to the protected hardware (e.g. LPZ 1/2), which one enclosure includes SPD protecting all lines (power supply and signal lines) crossing the zone boundary at relevant point |
— In the third part we will see complete protective circuits, there will be examples showing how deep we worked on them and who relies upon our products and confide us. Naming of all circuits, ZOP refers to Zone Overvoltage Protection, though, its acronym is pronounced easier both in Polish and English. In Russia you call it "UZIP". UZIP is a kind of a general naming, so I'm confused with the use of UZIP name for sophisticated circuits. I wish UZIP to be distinguished somehow, and, with your permission, I will apply it to small protection circuits, which have smaller enclosures, as ones we've just mentioned.
RST TV camera location protective circuit
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ZOP – схемы защиты от перенапряжений |
ZOP – zone overvoltage protection |
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Схемы защиты от перенапряжений камерных пунктов RST TV |
RST camera points overvoltage protection circuits |
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Сторона защищаемая выходы защищённые |
PROTECTED SIDE Protected outputs |
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Защита сигнальных линий (видео, управление) при использовании УЗИП RST |
Signal lines protection |
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Защита цепи питания при использовании УЗИП LEUTRON |
Protection of power supply circuit with using LEUTRON SPD |
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Заземление (PE) |
Earthing (PE) |
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Сигнализация повреждения цепи питания |
Power supply circuit damage alarm |
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СТОРОНА НЕЗАЩИЩЁННАЯ выходы незащищены |
UNPROTECTED SIDE Not protected outputs |
— Example of RST TV overvoltage protection circuit for camera locations. Always such ZOP has one unprotected side, by which the cables are laid externally, and protected one. Look, here the cables perfectly penetrate the box and going out from the opposite side, no returning cables, but here we have only PE cable connection, it is necessary and inevitable. And there are no current influence, that passes outside, it is limited to the ground at that location with unprotected lines. There are standard IP elements, and there are power supply elements, protective elements are supplied by LEUTRON company, which we represent. This is why protection is provided for the power supply circuit and signal lines for that one camera or two cameras, because there are two elements. Our ZOP are always equipped with the power supply circuit damage alarm. In practice we always install variable resistors, and we can make sure of the proper functioning by means of that green window, it indicates that variable resistor is working inside. And if not, the window is off. It is hard to imagine, that someone will ever look inside the box, especially, when it is suspended at the hard-to-access height. Just never.
Circuits code identification
| Кодовое обозначение схем | Circuits code identification |
| Вид защищаемой системы | Type of protected system |
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Вид передачи видео сигнала
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Type of video signal transfer
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Напряжение питания
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Supply voltage
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Управление движением камеры
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Camera motion control
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Вид корпуса
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Type of enclosure
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— We introduced special code identification for the designer's convenience. RST TV refers to the type of the protected circuit. The following identification is the type of the video signals transmission, that is to say, a coaxial cable, twisted pair, Internet + PoE. The following is 230V or 24VDC power supply. Camera motion control is the next parameter. 8С is RST 485 double-cable, 2D is RST 422 also two cables, and 0 is immovable camera. Main enclosure type is UF. F refers to ultraviolet, this code means solar light resistance. S refers to standard enclosure not resistant to continuous radiation.
Damage alarm
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Сигнализация повреждения |
Damage alarm |
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Лампочка сигнализации повреждения |
Damage alarm lamp |
— The lamp enables a guard to note, if something is wrong with the system or something is lit. This indicates a presence of alarm. Properly trained guard will define the alarm status immediately. It is a simple monitoring method for the limiter with variable resistor installed in the power supply circuit with no need to open the box.
RST AL TMP alarm module
| Схемы защиты от перенапряжений тревожных систем | Alarm systems overvoltage protection circuits |
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Схема защиты сигнализатора с использованием УЗИП RST AL, защита цепей: |
Alerting device protection circuit by using RST AL SPD, protection of following circuits: |
| Модуль RST AL TMP для сигнализации саботажа схемы защиты от перенапряжений | RST AL TMP module for the overvoltage protection circuit sabotage alarm |
— The following circuit is the alerting device protection by using RST AL. The designer selects its parameters by himself, by knowing the current conducted by the alerting device in question. The manufacturers apply various parameters for that location. Here you can see additional protection, look, one, two, three circuits, three SPDs. Acoustic alarm, visual alarm and sabotage alarm with respect to the box, sabotage is included anywhere. Here and here as well. RST AL TMP module for the overvoltage protection circuits sabotage alarm.
Robotic arm protection circuit/p>
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Схема защиты манипулятора с использованием УЗИП RST AL, защита цепей: |
Arm protection circuit by using RST AL SPD, protection of following circuits: |
| Модуль RST AL TMP для сигнализации саботажа схемы защиты от перенапряжений |
RST AL TMP module for the overvoltage protection circuit sabotage alarm |
— The robotic arm protection circuit by using RST AL SPD in the 12 V power supply and data bus circuits. Again, the RST AL TMP module for the overvoltage protection circuit sabotage alarm.
Central unit protection circuits
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Схемы защиты централи |
Central unit protection circuits |
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Защита линии питания 230 В - ограничители LEUTRON |
230V power supply line protection – LEUTRON limiters |
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УЗИП для защиты линий: |
RST AL SPD for protection of following lines: |
— Larger circuits, such as central control panels circuits, security alarm system central units. Variously, for example, here we installed cheap LEUTRON elements, and there are many RST elements installed for all signal lines, that are connected to the control unit. The power supply circuits, look on the left, and on the right – protection by LEUTRON elements, that is to say, RST AL SPD is for protection of low-current, high-current and data bus lines, there are three configurations.
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