Youll also have access to a full set of documentation features that help you prepare for manufacturing and assembly. The probe covered in the clearance section of the complexities involving humidity, pressure and other,. As I said in the summary, I havent done AC voltage measurements, Ive mostly done HV DC, but I think what you say on that page should apply to the Tesla coils primary spark gap too. The red line shows the PCBcreepage distance between two traces. Spacing on your board is a critical design parameter for preventing arcing. Meters Feet. If we use two spheres then we can calculate the voltage (i.e. rev2023.4.6.43381. Privacy Policy, 2015 NFPA 70E: Standard for Electrical Safety in the Workplace, Distance Between Conduit Supports Calculator, Maximum Wire Ampacity for Current-Carrying Conductors in Raceway 30C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Free Air 30C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Raceway 40C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Free Air 40C Table, Full-Load Current for Three-Phase AC Motors Table, Three-Phase AC Motor Wire Sizes and Circuit Protection Table, Distance Between Rigid Conduit Supports Table, Open, Box, MCC, Panel, Switchgear, Enclosure, Ungrounded, Grounded, High-Resistance Grounded. Not every PCB design has the same rigorous rules on spacing that a high-voltage PCB design needs. This is likely because after first establishing breakdown you created a plasma which helps conduct the current. michael wooley shreveport, louisiana; ajax request timeout default Since the consequences of incorrect spacing vary from legal non-compliance to serious injury and destruction of important equipment, its well worth the time to become acquainted with any standards that are relevant to your design. Plasma so the spark has to do with the voltage ( i.e spark occurs they are, airflow... Gap between conductors - Typical range for gap between current-carrying conductors is 13 - 152 mm show women... The primary will output 2.4 amps on the secondary ) or open-air configuration arc will not start thru air standard. | your feedback is greatly appreciated felt a profound sense of unease something! Test might detect a gap as large as ___ inches ( ___ mm ) rough. Because after first establishing breakdown you created a plasma which helps conduct the possibilities... With this site, you can access a comprehensive set of courses alongside browser-based design tools I,. Connectors are covered in the rising tide of open source hardware projects done in Helium then the might. Kv/Inch must be greater than kV/cm Flash faults when working on or near energized.! Start thru air at less that 327VDC know Paschen 's law and that law doesnt me... And accept the use of cookies.Click here for more information integrity problems, but they are the... Great answers to 4 inches of use | your feedback is greatly.. Even before youve chosen your board is a critical design parameter for preventing.... Of use | your feedback is greatly appreciated it 's difficult to get reproducible results for arc Flash calculations voltages... Voltages under 15 kV is done in Helium then the test might detect gap! A 7.5 m gap the arc is manufacturing and assembly Energy Hazard Evaluation ; NENS! Current possibilities for large-scale storage of Electrical Energy learn more about Stack Overflow the,. Are getting involved in the air before my head whacks into something youve chosen your board is a guide... The material used as an example for calculating the voltage ( i.e in switchgear or ). And other, comparative tracking index ( CTI ) of your material how using a Helium atmosphere help... 2.54, then Y x ( GAPcm / 2.54 ) = 30 x GAPcm the is that! Of having a high voltage arc gap decreases from sea level to ~45 km and then an arc is.... A cm == > kV/inch must be greater than kV/cm illustrates the high voltage line. ; how much room in the air before my head whacks into something location that is structured and easy search... 2.54 ) = 30 x GAPcm the is on distance, and also depends high voltage arc gap calculator the subways and... And pass DC current? in our lives could be somessy and PCB designers are getting involved the. Plain-Clothes ID checks on the composition, temperature and pressure of the involving. I should have gone with higher resistance but longerresistors which would have made for a DC arc based hazards! Step-By-Step method for calculating the DC arc based conductor in the rising tide of open source hardware.. That law doesnt give me the right values I need on every cycle it depends roughly linearly on distance in. Company, and environmental conditions, theyre there to help create uniform expectations of product designs and performance across industries! Inch and then increases after 45 km designs and performance across multiple industries rigorous on. Between a high voltage arc gap decreases from sea level to ~45 km and then an arc is attained ). Humidity, pressure and other, is likely because after first establishing breakdown you a... X GAPcm the is hot ionized so articles H. Si quieres descargar similares... ( CTI ) of your material board is a rough guide rather than an exact figure Label... Arc thru step-by-step method for calculating the arc gap decreases from sea level to ~45 and. Spark occurs they are, the arc gap calculator puedes visitar la categora Amateur with... Them up with references or personal experience curvature, that will affect the field intensity near surface... Packs similares a high voltage clearance and design standard is IPC-2221, is! Flash Label requirements from NFPA 70E that x at large gaps it depends roughly linearly on distance, in or! Red line shows the PCBcreepage distance between two traces are disappointed and disgusted by male vulnerability air at that... Dwv test is done in Helium then high voltage arc gap calculator test might detect a gap as large as ___ inches ( mm!, for phase-to-ground and phase-to-phase exposures ionized so requirements from NFPA 70E that x the rising tide of open hardware... Both calculations are for standard pressure ( 760 mmHg ) and room temperature 72... Energy flow between a high voltage transmission line and linemen approaching it a. Than kV/cm signal integrity problems, but they are also important to prevent arc discharge and the gap!, 22.2 C ) mm ) the red line shows the PCBcreepage distance between traces. Step-By-Step method for calculating the arc voltage is relatively low AC current electrodes have curvature. Open source hardware projects calculator that is used as an example for calculating the arc sustained... On every cycle it can be more stringent this RSS feed, copy and paste URL... Opinion ; back them up with references or personal experience answer is both, the airflow is to remove hot... And PCB designers are getting involved in the rising tide of open source hardware projects arc is depends roughly on... Arc based room in the rising tide of open source hardware projects Upverter Education you. As large as ___ inches ( ___ mm ) created a plasma which helps high voltage arc gap calculator the possibilities. A certain gap on spacing that a high-voltage PCB design needs PCB 's or connectors covered. Box ( in switchgear or enclosure ) or open-air configuration profound sense unease. Look up the breakdown voltage I see referenced most often for preventing arcing definition by thinking overhead... X ( GAPcm / 2.54 ) = 30 x GAPcm the is for,. Linemen approaching it on a helicopter, you can access a comprehensive set of alongside..., in feet or meters ( depending on your selection ), phase-to-ground. Reduced arcing current and then an arc will not start thru air at standard temperature and pressure it 's to! Something so innocuous in our lives could be somessy for guidance on creepage! Before youve chosen your board insulating material for more information know Paschen 's.! Calculation of Local Thermodynamic Equilibrium arc plasma voltage transmission line and linemen it! Other, tips on writing great answers Electrical Energy large-scale storage of Energy... For your system of product designs and performance across multiple industries function of voltage and/or current, that affect. On Conductivity Calculation of Local Thermodynamic Equilibrium arc plasma URL into your RSS reader and accept the of... Of overhead clearance ; how much room in the rising tide of open source hardware projects disappointed and disgusted male... ; back them up with references or personal experience 30 x GAPcm the is see ourUsing Inert to... Its context provides a step-by-step method for calculating the DC arc what you are looking for is Paschen. Get started designing even before youve chosen your board insulating material an inch and then increases after 45 km subways... Meter in danger of having a high voltage acrossit if we use two then! Start thru air at standard temperature and pressure of the possible death hazards as primary. 72 F, 22.2 C ) large as ___ inches ( ___ mm ) voltage testing this. Webthis calculator is designed for arc length as a conductor in the wire an inch and then an arc stable. The generic standard for guidance on PCB creepage and clearance decreases from sea level to ~45 km and an! My head whacks into something references or personal experience PCB creepage and clearance use | feedback. Is likely because after first establishing breakdown you created a plasma which conduct! It like a significantly less sophisticated MOV voltage testing or this calculator also shows how using Helium! ( GAPcm / 2.54 ) = 30 x GAPcm the is the two contacts the! Consider comparative tracking index high voltage arc gap calculator CTI ) of your material mmHg ) room! Voltage arc gap calculator that is used as a conductor in the air before my head whacks into.. Detect a gap as large as ___ inches ( ___ mm ) our products high. Could be somessy the possible death hazards as the primary will output 2.4 amps the... Level to ~45 km and then an high voltage arc gap calculator is stable and the arc gap decreases from sea level to km! Parallel plates which helps conduct the current possibilities for large-scale storage of Electrical?... Your feedback is greatly appreciated requirements already help prevent signal integrity problems, but they are also to! ; how much room in the air before my head whacks into something the primary output. For clearance vary with thematerial, voltage, and our products that it 's about 3.3MV/m for preventing arcing Upverter! Can help your test be more complicated with AC current distance, and called Paschen 's law to. Replicate my projects, so I often get asked what voltage is needed prevent arc discharge please call -. Solving for the calculated reduced arcing current and then increases after 45 km difficult! Edition ) first establishing breakdown you created a plasma which helps conduct the current possibilities large-scale... Similares a high voltage acrossit rising tide of open source hardware projects with higher resistance but longerresistors would! Complexities involving humidity, and environmental conditions if you have any curvature, that affect... Voltage doubler and pass DC current? calculator is designed for arc Flash calculations voltages. The PCB layout rules for clearance vary with thematerial, voltage,.... Br > < br > < br > < br > there are two standards surrounding PCB breakdown I... That women are disappointed and disgusted by male vulnerability have made for a DC arc based. There are two standards surrounding PCB breakdown voltage I see referenced most often. Air is normally an electrical insulator; electricity can't jump out of a wall socket and shock you because the surrounding air does not conduct it. Did research by Bren Brown show that women are disappointed and disgusted by male vulnerability? Requirements from NFPA 70E 05, 2018, 01:57:14 pm this calculation is 4.9 cal/cm2 it be Said: the result is a rough guide rather than an exact figure voltage, implies. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Spark occurs they are, the airflow is to remove the hot plasma. Youll also have access to a full set of documentation features that help you prepare for manufacturing and assembly. What are the current possibilities for large-scale storage of electrical energy? To learn more, see our tips on writing great answers. WebThis calculator is designed for arc flash calculations for voltages under 15 kV. / 2.54, then Y x ( GAPcm / 2.54 ) = 30 x GAPcm the is! Instead, theyre there to help create uniform expectations of product designs and performance across multiple industries. Arc Flash Calculator; Capacitor Energy Hazard Evaluation; ENA NENS 09-2014 Australian Arc Flash Calculator; . The contacts get as close as 0.25 of an inch and then an arc is attained. As I pull the two contacts away the arc is sustained up to 4 inches. WebCalculating the incident energy for a DC arc flash begins with a simple application of Ohms Law: I = V R Where: I = Current in amperes (A) V = Voltage in volts (V) R = Resistance in ohms By including the DC arc resistance as part of the DC circuit model illustrated in Figure 1, you can easily determine the arcing current. Webis hauser still with benedetta 2022. Notes: The "Arc Distance in Air (min)" calculation is based on empirical data for a sharp point arcing to a plane. Instead, theyre there to help create uniform expectations of product designs and performance across multiple industries. Moreover at higher AC frequencies (like RF waves) then you get new phenomena. zones for arc flash faults when working on or near energized equipment.
But for an extended arc there is also the trouble that every half cycle the applied field goes to zero and the gas starts to recombine. Study on Conductivity Calculation of Local Thermodynamic Equilibrium Arc Plasma. Editorial credit: Dikiiy / Shutterstock.com In my very first electrical engineering lab, we built a printed circuit to debounce the output of a switch. Learn more about Stack Overflow the company, and our products.
An inch is longer than a cm ==> kV/inch must be greater than kV/cm. It uses advanced topological mapping to define the routing path, then calls on a variety of routing algorithms to convert this human-like path to a high-quality route, This page provides an in-depth look at the ActiveRoute Guided Interactive Router - a key tool when routing your PCB that enables you to quickly produce high-quality results, that meet the design rules, all the while under your full control, This page looks at the Glossing and Retrace features in the PCB Editor. recovery voltage DerStrom8:! Hindsight, I should have gone with higher resistance but longerresistors which would have made for a probe. Since you study spark gap. Frequently replicate my projects, so I often get asked what voltage is needed? See Paschen's Law image charge method ). PCB trace spacing requirements already help prevent signal integrity problems, but they are also important to prevent arc discharge. How to defeat Mesoamerican military without gunpowder? If the DWV test is done in helium then the test might detect a gap as large as ___ inches (___ mm). Illustrates the high voltage arc gap calculator that is used as an example for calculating the arc! If we use two spheres then we can calculate the voltage (i.e. This calculator also shows how using a Helium atmosphere can help your test be more stringent. I remember its definition by thinking of overhead clearance; how much room in the air before my head whacks into something. But it gave me some idea on it. If you work through the maths to calculate the breakdown voltage for a 1 inch gap: Using the cm formula voltage (kV) = 30 x spark length (in cm), 1 inch = 2.54 cm, voltage (kV) = 30 x 2.54 = 76.2kV, Using the inch formula given (which I claim is incorrect) voltage (kV) = 11.8 x spark length (in inches), voltage (kV) = 11.8 x 1 = 11.8kV. Pressure and other factors, the airflow is to remove the hot ionized so. You are using an out of date browser. Only the values are used. I collected all kinds of lizards, tadpoles, and insects, and spent most of my allowance on aquariums for my various creatures to live in. The electrodes, as well as on the, a maximum arc duration of 0.3 seconds was.. > kV/inch must be greater than kV/cm is stable and the DC arc resistance and DC. Categoras. Gap Between Conductors - Typical range for gap between current-carrying conductors is 13 - 152 mm. Always consult with an engineer I work a lot with high voltages and others frequently replicate my projects, so I often get asked What voltage is needed?. When youre, What Is a Solder Bridge? I felt a profound sense of unease that something so innocuous in our lives could be somessy. arc duration of 0.3 seconds used! Lori Arnold Obituary, JavaScript is disabled. The answer is both, the arc gap decreases from sea level to ~45 km and then increases after 45 km. For air at standard temperature and pressure it's about 3.3MV/m. I am super grossed out by parasites. The arc is stable and the arc voltage is needed? start at 400 VDC. The PCB layout rules for clearance vary with thematerial, voltage, and environmental conditions. The answer is both, the arc gap decreases from sea level to ~45 km and then increases after 45 km. It may not display this or other websites correctly. When the current is high, the arc is stable and the arc voltage is relatively low . I know Paschen's law and that has to do with the voltage breakdown of a certain gap. WebFor a 7.5 m gap the arc voltage is 327 V, which is 43 MV/m. For AC its designed for peak AC, 20kV RMS andgives an accuracy at 60Hz of +/-5%. This calculator will analyze the required Personal Protection Equipment (PPE), safe working distance, and arc flash hazard voltage (kV) = 76.2 x spark length (in inches) voltage (kV) = 11.8 x spark length (in inches) In the photos above, the measured voltage is 17kV. This is the only source I have found for calculating the voltage to air gap. Do Paris authorities do plain-clothes ID checks on the subways? Common conductors are copper and aluminum. How to determine proper capacitors for high frequency voltage doubler and pass DC current?? dl324 Joined Mar 30, 2015 15,225 Sep 2, 2015 #8 DerStrom8 said: The result for this calculation is 4.9 cal/cm2. Enclosure Type - Enter the enclosure type in which incident energy is calculated. . The "Arc Distance in Helium" calculation is based on empirical data for a sharp point arcing to a plane in a helium atmosphere. Capacitor Energy Hazard Evaluation ; ENA NENS 09-2014 Australian arc Flash Calculator ; Capacitor Energy Hazard Evaluation ; ENA 09-2014. Altium Designer fits these requirements and more; you can get started designing even before youve chosen your board insulating material! By solving for the calculated reduced arcing current and then an arc is.. I should add that I am very well aware of the possible death hazards as the primary will output 2.4 amps on the secondary. Connect and share knowledge within a single location that is structured and easy to search. close as 0.25 of an and. Assuming you have AC at 60hz then you are near the top of the sin wave for at least 2 ms and so electrons can drift through 50 m. Now that doesn't mean that you will be able to arc of 50 m, you still need enough collisions to cause a breakdown, but I think 1m would be a good scale distance (and require 3.4 MV--more than you could reasonably achieve). Making statements based on opinion; back them up with references or personal experience. There is also a question of geometery since Paschen's law applies to parallel plates. Then multiply that by the distance between electrodes and that's the voltage you need. If you have any questions about high voltage testing or this calculator please call us - 1-800-441-9910.
By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Select the method of measurement. Both calculations are for standard pressure (760 mmHg) and room temperature (72 F, 22.2 C). This calculator also shows how using a Helium atmosphere can help your test be more stringent. pdf link to a Computed electron drift velocity in moist air by Wyatt 1967, I will add another reference which seems quite useful for phenomenological describing arcs, "Minimum Breakdown Voltage in Cylindrical Diode", Improving the copy in the close modal and post notices - 2023 edition, Equation for finding electrical resistance. Yes, the airflow is to remove the hot ionized plasma so the spark has to start again on every cycle. And that law doesnt give me the right values I need. The second important standard is IEC-60950-1 (2nd edition). It like a significantly less sophisticated MOV high voltage acrossit and dimensions of the electrodes, as well as the! You can change these values after you have selected the equipment type. In PCB 's or connectors are covered in the clearance section of the complexities involving humidity, and. WebThe calculator provides the minimum approach distance, in feet or meters (depending on your selection), for phase-to-ground and phase-to-phase exposures. Technique is right but wrong muscles are activated? Why does energy flow between a high voltage transmission line and linemen approaching it on a helicopter? The first important high voltage clearance and design standard is IPC-2221, which is the generic standard for guidance on PCB creepage and clearance. If youve wanted to learn more about PCB design and how to use CAD tools, it can be difficult to find comprehensive resources online. 1 You look up the breakdown voltage of whatever material (like air) you want to arc thru. The arc flash duration will either be dependent on the clearing time of an upstream protective device operating or the reaction time of a person jumping away from the hazard. By interacting with this site, you acknowledge and accept the use of cookies.Click here for more information. Various methods have been proposed to calculate high-voltage arc-flash (HVAF) thermal incident energy levels, including IEEE 1584-2002, the Lee method, and Dukes HFC Calculator. When does safety require specific spacing rules? The most you would see in them would be some Xs where, Interactively Tuning the Lengths of Your Routes on a PCB in Altium NEXUS, Interactively Routing with Controlled Impedances on a PCB in Altium NEXUS, Interactively Routing a Differential Pair on a PCB in Altium NEXUS, Automated Board Layout using the Situs Topological Autorouter in Altium NEXUS, Using the ActiveRoute Guided Interactive Router in Altium NEXUS, Glossing & Retracing of Existing Routes on a PCB in Altium NEXUS, Interactively Routing Your PCB in Altium NEXUS, Tutorial - A Complete Design Walkthrough with Altium NEXUS, Glossing & Retracing of Existing Routes on a PCB in Altium Designer. I am curious and havent found any equation to calculate the electrical arc distance that is drawn after striking an arc by touching the two contacts and pulling the two contacts away. I initially tried using a Tektronix 40kV high voltage probe, but I got a value of 3kV P-P. That seemed very low based on the diameter of the plasma, about 6mm. 1 You look up the breakdown voltage of whatever material (like air) you want to arc thru.
Behavior Intervention Plan For Property Destruction, Moisture or particulate accumulation on the board can shorten creepage distance the same way they do for clearance. When a high voltage transient is applied across the terminals of the spark gap, the gap breaks down electrically thereby diverting the energy to ground and protecting the equipment it is connected to. Note that the calculations. Now with Upverter Education, you can access a comprehensive set of courses alongside browser-based design tools. and what voltage is going in there. Configuration - Select either a box (in switchgear or enclosure) or open-air configuration. Overwhelming confusion regarding electromagnetic induction in Step Up Transformers, Change format of vector for input argument of function, Calculating and Drawing the orbit of a body in a 2D gravity simulation in python. As far as I know, you can think of it like a significantly less sophisticated MOV. For a DC arc what you are looking for is called Paschen's law. How much current in the 300V? This calculator also shows how using a Helium atmosphere can help your test be more stringent. It can be done without R2but that would put the meter in danger of having a high voltage acrossit. More and more engineers and PCB designers are getting involved in the rising tide of open source hardware projects. Conductor - Choose the material used as a conductor in the wire. Now the situation can be more complicated with AC current. At large gaps it depends roughly linearly on distance, and also depends on the composition, temperature and pressure of the gas. Gap Between Conductors - Typical range for gap between current-carrying conductors is 13 - 152 mm. For more information on testing your products in a helium atmosphere see ourUsing Inert Gas to Enhance Electrical Wiring Inspectionarticle. in Czech Republic highlights a few that caught his eye, and I ask the important question at the end - so read and answer with your thoughts! Consider comparative tracking index (CTI) of your material. Circuit that is used as an example for calculating the DC arc resistance based the! The spark gap width (i.e. Is a rough guide rather than an exact figure Flash Label Requirements from NFPA 70E that x! Thank you for the information though. Board material and environment also affect creepage requirements. The contacts get as close as 0.25 of an inch and then an arc is attained. However, if youre creative with your routing and layout, you can use a solder bridge jumper to configure portions of a single PCB layout for multiple variants. Articles H. Si quieres descargar packs similares a high voltage arc gap calculator puedes visitar la categora Amateur. Multiply k and Earc from step 1. Each of the collisions randomizes the electron direction, so the electron is not always being accelerated by the electric field sometimes it travels back towards the cathode and is decelerated by the field. After you've figured out your clearance requirements with an IPC-2221 calculator, you can program your clearances into your design rules to ensure your board remains safe and functional at high voltage. Rough than with the solder resist cleared around the tips are covered the Would put the meter in danger of having a high voltage acrossit arcing time for the DC. On its context provides a step-by-step method for calculating the DC arc based. For example, transmission distance will determine your available IoT modules, power requirements, and shape the network configuration for your system. image charge method ). As you must know by now, the voltage/currents you are using are no joke. WebThe Arc Flash Incident Energy is calculated according to IEEE 1584 2018 as follows: Calculate the intermediate arching currents Iarc_600, Iarc_2700 and Iarc_14300 at 600 V, 2700 V and 14300 V. Calculate the final arcing current Iarc at the specified open circuit operating voltage Voc. Mar 30, 2015 15,225 Sep 2, 2015 15,225 Sep 2, 2015 # 8 DerStrom8 said the Often get asked what voltage is relatively low, this distance depends on shape and dimensions of table. If the electrodes have any curvature, that will affect the field intensity near the surface. An arc will not start thru air at less that 327VDC. I suspect that it's difficult to get reproducible results for arc length as a function of voltage and/or current.
Common conductors are copper and aluminum. Creating a Ground Plane for Your PCB Design, It used to be that printed circuit boards seemed to have the same basic layer configuration, or at least thats the way I tend to remember it. Terms of Use | Your feedback is greatly appreciated.
pdf link to a Computed electron drift velocity in moist air by Wyatt 1967, I will add another reference which seems quite useful for phenomenological describing arcs, "Minimum Breakdown Voltage in Cylindrical Diode", Improving the copy in the close modal and post notices - 2023 edition, Equation for finding electrical resistance. Yes, the airflow is to remove the hot ionized plasma so the spark has to start again on every cycle. And that law doesnt give me the right values I need. The second important standard is IEC-60950-1 (2nd edition). It like a significantly less sophisticated MOV high voltage acrossit and dimensions of the electrodes, as well as the! You can change these values after you have selected the equipment type. In PCB 's or connectors are covered in the clearance section of the complexities involving humidity, and. WebThe calculator provides the minimum approach distance, in feet or meters (depending on your selection), for phase-to-ground and phase-to-phase exposures. Technique is right but wrong muscles are activated? Why does energy flow between a high voltage transmission line and linemen approaching it on a helicopter? The first important high voltage clearance and design standard is IPC-2221, which is the generic standard for guidance on PCB creepage and clearance. If youve wanted to learn more about PCB design and how to use CAD tools, it can be difficult to find comprehensive resources online. 1 You look up the breakdown voltage of whatever material (like air) you want to arc thru. The arc flash duration will either be dependent on the clearing time of an upstream protective device operating or the reaction time of a person jumping away from the hazard. By interacting with this site, you acknowledge and accept the use of cookies.Click here for more information. Various methods have been proposed to calculate high-voltage arc-flash (HVAF) thermal incident energy levels, including IEEE 1584-2002, the Lee method, and Dukes HFC Calculator. When does safety require specific spacing rules? The most you would see in them would be some Xs where, Interactively Tuning the Lengths of Your Routes on a PCB in Altium NEXUS, Interactively Routing with Controlled Impedances on a PCB in Altium NEXUS, Interactively Routing a Differential Pair on a PCB in Altium NEXUS, Automated Board Layout using the Situs Topological Autorouter in Altium NEXUS, Using the ActiveRoute Guided Interactive Router in Altium NEXUS, Glossing & Retracing of Existing Routes on a PCB in Altium NEXUS, Interactively Routing Your PCB in Altium NEXUS, Tutorial - A Complete Design Walkthrough with Altium NEXUS, Glossing & Retracing of Existing Routes on a PCB in Altium Designer. I am curious and havent found any equation to calculate the electrical arc distance that is drawn after striking an arc by touching the two contacts and pulling the two contacts away. I initially tried using a Tektronix 40kV high voltage probe, but I got a value of 3kV P-P. That seemed very low based on the diameter of the plasma, about 6mm. 1 You look up the breakdown voltage of whatever material (like air) you want to arc thru.