In addition, techniques are used to ensure safe, well-controlled ramp up of voltage from any condition, including recovery from an arc, overload, or short circuit. Chords Diagrams. Digging equipment (either hand tools or machine driven) that contacts a buried cable may energize piping or the ground in the area, resulting in electrocution of nearby workers. These notes cover a number of different subjects that will help inform you of the potential issues and concerns when designing in high voltage power supplies.XP Power is committed to being a leading provider of power solutions, including AC-DC power supplies and DC-DC converters, high voltage power supplies and RF power supplies.XP offers total quality, from in-house design in Asia, Europe and North America through to manufacturing facilities around the world.Be the first to hear about new product announcements, our latest blog posts and much more. In addition, we typically employ large window U-cores which give enough space for the proper gradients.XP Glassman HV supplies utilize our proprietary PWM converter technology for the main power conversion. High voltage power supplies for high power applicationsThe Glassman name has become synonymous with high reliability, dedication to technology development, lean manufacturing principles and customer support which is second to none within the power supply industry. Key Variations. All computer interfaces provide complete galvanic isolation between the host computer and the power supply of up to 1000VAC. However, since the arc extinguished at 12kV, the fast rise is only 15kV – 12 kV = 3kV, as shown.To assist you with your product design we have put together a number of technical notes for you to download. Even though the resistors are high-energy types and can withstand a short burst of arcs, they may not be able to withstand a continuous arcing condition. Last updated on 05.22.2015 This eliminates any possibility of the feedback operational amplifiers losing control and generating improper drive signals.A variety of local and remote control possibilities come standard on XP Glassman supplies. Equipment and conductors that carry high voltage warrant special safety requirements and procedures. All of our HV assemblies are based on the well-known Cockcroft-Walton voltage multiplier concept, (or variations, thereof), to achieve high DC outputs while minimizing peak transformer secondary voltages.
The output recharge characteristic causes the output to charge to approximately 25% of rated very quickly (determined by the current rating of the supply and the total output capacitance and load). High Voltage AC-DC Power Supplies High voltage power supplies for high power applications. If solid or liquid encapsulation is employed, this capacitance is much higher than in air since the dielectric constant of air is 1.0 while most encapsulants are on the order of 3-4.5. Bias rail voltages are all derived from a single source so that the rise and decay of the bias voltages during turn on and off remain in the same relationship as for normal running. The shield of the mating cable is terminated at the chassis for safety.The arc occurs at the point two cm to the left of the center graticule when the HV output discharges. Toroidal terminals and equipotential surfaces are used to minimize the electrostatic fields. DC power supply technology is utilized in processes and instruments that improve society and the lives of people around the world on a daily basis. Almost all XP Glassman supplies employ air as the primary insulating medium and utilize a high frequency PWM off line converter.While not suitable for ultra-miniaturized modules operating in severe environmental conditions, air insulation offers a lightweight repairable structure that minimizes parasitic capacitance losses for most applications. (NOTE: Some models or applications require external series protection resistance.) In this photo, the arc extinguished at approximately 12kV.
The depth of the connector varies with the voltage level. The The standard precautions to avoid injury include working under conditions that would avoid having electrical energy flow through the body, particularly through the heart region, such as between the arms, or between an arm and a leg. To avoid coronal losses, conductors are kept as short as possible and free of sharp points. Other injuries can include burns from the arc generated by the accidental contact. The PTS-75, PTS-75F5 and PTS-75F6 are combination high voltage DC proof tester and megohmmeter. Capacitance is directly proportional to the insulation dielectric constant.Our HV transformers typically have 6kV or less peak voltage on the secondaries and employ special universal winding techniques to produce a self-supporting large diameter winding which has the proper voltage gradients. XP Glassman has provided its power supply technology for over 40 years to leading Original Equipment Manufacturers, industrial service providers and to both private and public research institutions. The "zone" system of classification is now used in modified form in U.S. Electrical discharges, including partial discharge and Hazards due to lightning obviously include a direct strike on persons or property. Protection is provided by an arc count circuit, which inhibits the HV generation when the number of arcs exceeds a safe limit within a specified period of time. In recent years, standards for explosion hazard protection have become more uniform between European and North American practice.
This not only protects the HV components and the customer’s load, but also reduces the discharge energy that occurs during an arc and minimizes the electromagnetic interference (EMI) pulse that can damage or disrupt sensitive controls and microcontrollers. For example, for ion sources where an external series resistor is normally provided, the arc counting feature is not needed. This technique allows for reasonable average power dissipation in the limiting resistors. RS232, USB, and Ethernet control and monitoring are also available on many supplies. Intentionally produced arcs, such as used in lighting or Electrical transmission and distribution lines for Spark gaps were used historically as an early form of radio transmission.
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