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Power

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Power - Introduction

Power Electrical Feedthroughs

Power is the classification given by to ISI™ electrical feedthroughs used to carry either high voltage or high current, or both. The majority of feedthroughs in Section 4 are built with exposed conductors on both the air- and vacuum-sides. Air- and vacuum-side connectors are available for most products in this section and must be purchased separately unless noted otherwise.

ISI™ Power Feedthroughs are used in a multitude of applications including vacuum furnaces, sample heating, biasing and in-vacuum coating applications such as electron beam evaporation, resistive heating evaporation and DC plasma sputtering.

Power Feedthrough electrical ratings are determined by various factors, including insulator dielectric strength, geometry and system operating pressure. Please note that all ISI™ Catalog products are electrically rated for operation with one side in dry atmospheric conditions and the other side in vacuum with a maximum system pressure of 1x10-4 Torr. We advise that users make allowances for deviations from stated operating parameters and take adequate safety precautions when feedthroughs are operated at high voltages or high currents.

 Power Feedthroughs
Low Power 500 to 5000V DC / to 15 Amps
   1 Pin-Weldable 500 Volts
   1 Pin- Weldable 1000 Volts
   1 Pin- Weldable 3000 Volts
   1 Pin- Weldable 5000 Volts
   2 Pins- Del Seal CF
   2 Pins- Kwik Flange KF
   2 Pins- Weldable
   4 Pins- Del Seal CF
   4 Pins- Kwik Flange KF
   4 Pins- Weldable
   8 Pins- Del Seal CF
   8 Pins- Kwik Flange KF
   8 Pins- Weldable
Medium Power 2500 to 5000V DC / to 30 Amps
   2500 Volts / 10 Amps / 4 to 10 pins- Del Seal CF
   2500 Volts / 10 Amps / 4 to 10 pins- Kwik Flange KF
   2500 Volts / 10 Amps / 4 to 10 pins- Weldable
   5000 Volts/ to 15 Amps / 2 & 4 Pins- Del Seal CF
   5000 Volts/ to 15 Amps / 2 & 4 Pins Kwik Flange KF
   5000 Volts/ to 15 Amps / 2 & 4 Pins- Weldable
Medium Power 10,000V DC/ to 30 Amps
   5000 Volts / to 30 Amps/ 1 to 8 Pins- Del Seal CF
   5000 Volts / to 30 Amps/ 1 to 8 Pins- Kwik Flange KF
   5000 Volts / to 30 Amps/ 1 to 8 Pins- Weldable
   10,000 Volts/ to 30 Amps/ 1 to 4 Pins- Del Seal CF
   10,000 Volts/ to 30 Amps/ 1 to 4 Pins- Kwik Flange KF
   10,000 Volts/ to 30 Amps/ 1 to 4 Pins-
High Power 20,000 to 100,000 DC to 150 Amps
   20,000 Volts/ 15 Amps/ 1 Pin- Del Seal CF
   20,000 Volts/ 15 Amps/ 1 Pin- Kwik Flange KF
   20,000 Volts/ 15 Amps/ 1 Pin- Weldable
   20,000 Volts/ to 150 Amps/ 1 Pin- Del Seal CF
   20,000 Volts/ to 150 Amps/ 1 Pin- Kwik Flange KF
   20,000 Volts/ to 150 Amps/ 1 Pin- Weldable
   25,000 Volts / to 30 Amps/ 2 &3 Pins - Del Seal CF
   25,000 Volts / to 30 Amps/ 2 &3 Pins - Kwik Flange KF
   25,000 Volts / to 30 Amps/ 2 &3 Pins – Weldable
   20,000 to 30,000 Volts / 1 Amp/1 Pin- Del Seal CF
   20,000 to 30,000 Volts / 1 Amp/1 Pin- Kwik Flange KF
   20,000 to 30,000 Volts / 1 Amp/1 Pin- Weldable
   30,000 to 40,000 Volts/ to 3 Amps/ 1 Pin- Del Seal CF
   30,000 to 40,000 Volts/ to 3 Amps/ 1 Pin Kwik Flange KF
   30,000 to 40,000 Volts/ to 3 Amps/ 1 Pin- Weldable
   45,000 to 100,000 Volts / 3 Amps/ 1 Pin- Del Seal CF
   45,000 to 100,000 Volts / 3 Amps/ 1 Pin- Weldable
High Power 3000 to 12,000V DC to 600 Amps
   3000 to 12,000 Volts to 600 Amps/ 1Pin- Weldable - 3kV
   3000 to 12,000 Volts to 600 Amps/ 1Pin- Weldable - 5kV
   3000 to 12,000 Volts to 600 Amps/ 1Pin- Weldable - 12kV
   3000 to 12,000 Volts to 600 Amps/ 1to 4 Pins- Del-Seal CF 3kV
   3000 to 12,000 Volts to 600 Amps/ 1to 4 Pins- Del-Seal CF 5kV
   3000 to 12,000 Volts to 600 Amps/ 1to 4 Pins- Del-Seal CF 12kV
   3000 to 5000 Volts to 600 Amps to 1 to 4 Pins- Kwik-Flange KF 3kV
   3000 to 5000 Volts to 600 Amps to 1 to 4 Pins- Kwik-Flange KF 5kV
   3000 to 5000 Volts to 250 Amps to 1 to 4 Pins- Del-Base DB 3kV
   3000 to 5000 Volts to 250 Amps to 1 to 4 Pins- Del-Base DB 5kV
   3000 to 5000 Volts to 250 Amps to 1 to 4 Pins- Del-Base DB 12kV
   3000 to 5000 Volts to 250 Amps to 1 to 4 Pins- Del-Base DB 15kV
Watered Cooled
   3000 to 5000 Volts/ 1 Pin- Weldable - 3kV
   3000 to 5000 Volts/ 1 Pin- Weldable - 5kV
   3000 to 5000 Volts / 1 to 4 Pins- Del-Seal CF 3kV
   3000 to 5000 Volts / 1 to 4 Pins- Del-Seal CF 5kV
   3000 to 5000 Volts / 1 to 4 Pins- Kwik-Flange KF 3kV
   3000 to 5000 Volts / 1 to 4 Pins- Kwik-Flange KF 5kV
   3000 Volts to 1000 Amps/ 1 Pin- Del-Seal CF 3kV
Power Connectivity
   5000 Volts/25 Amps/ 1 to 4 Pins- Del Seal CF
   5000 Volts/25 Amps/ 1 to 4 Pins- Kwik-Flange KF
   5000 Volts/25 Amps/ 1 to 4 Pins- Weldable
   10,000 Volts/ 25 Amps/ 1 to 4 Pins- Del Seal CF
   10,000 Volts/ 25 Amps/ 1 to 4 Pins- Kwik-Flange KF
   10,000 Volts/ 25 Amps/ 1 to 4 Pins- Weldable
   20,000 Volts / 25 Amps / 1 to 4 Pins- Del Seal CF
   20,000 Volts / 25 Amps / 1 to 4 Pins- Kwik-Flange KF
   20,000 Volts / 25 Amps / 1 to 4 Pins- Weldable
   15,000 Volts/ 70 Amps/1 & 2 Pins- Del Seal CF
   15,000 Volts/ 70 Amps/1 & 2 Pins- Kwik-Flange KF
   15,000 Volts/ 70 Amps/1 & 2 Pins- Weldable
   15,000 Volts/ 70 Amps/1 & 2 Pins- Del-Based DB
   15,000 Volts/ 70 Amps/1 & 2 Pins- Powerboot Lockout
   12,000 Volts/ 7.5 Amps/ 7 Pins- Del Seal CF
   12,000 Volts/ 7.5 Amps/ 7 Pins- Kwik-Flange KF
   12,000 Volts/ 7.5 Amps/ 7 Pins- Weldable

Strike, Puncture and Creep

Strike, Puncture and Creep are three industry terms used to describe electrical failure and rating criteria. Strike distance is the direct line of site distance from potential to ground. This rating is dependent on environmental and overall feedthrough geometry. Puncture distance is the distance between potential and ground through the bulk of the ceramic insulating material. This rating is dependent on both the dielectric strength of the ceramic and its geometry. Creep or Tracking distance is the distance from potential to ground along a ceramic insulator’s surface path. This rating is dependent on environment as well as the surface condition and overall length.

Electrical Performance

Proven design techniques are employed to optimize the electrical performance of ISI Power Feedthroughs. Where space is not a limitation, ceramic surfaces are made as long as possible to maximize Strike and Creep distances. If space is limited, ceramics are convoluted to achieve increased surface distance with minimal impact on the overall length. Convoluted or fluted ceramic feedthroughs are recommended for environments where moisture or other surface contaminants may hinder electrical performance. Reducing the ceramic surface roughness will minimize surface contamination and thus improve the Tracking characteristics of the feedthrough. A common method used to reduce surface roughness is the application of high temperature glass coating, or ‘glazing’. Glazing is a proven and cost effective method for enhancing the electrical performance of a ceramic.

Conductors

Conductors are offered in various material choices. These materials are selected based on current-carrying capacity and other environmental concerns such as corrosion and magnetism. Although Copper offers the best current-carrying capacity, it has the worst corrosion resistance. Stainless Steel on the other hand has good corrosion resistance but poor current rating. Pure Nickel has excellent corrosion resistance and medium current-carrying capacity.

Water Cooled Feedthroughs

Watercooled electrical components are typically used with grounded, closed-loop cooling systems and nonconductive coolants such as deionized water or ethylene glycol. If using plain tap water, the cooling system must be grounded and lines must employ nonconductive materials such as polypropylene tubing. Properly grounded water lines will provide a safe dissipation path for any power conducted by the water. Current or power ratings are usually not given for watercooled feedthroughs as the ratings are dependent on coolant flow rates and their heat dissipating capacity. Tap water temperatures can vary dramatically from one region to another, so too will its heat dissipating capacity. Users are advised to establish safe and practical coolant flow rates based on the power requirements for their specific application and coolant heat dissipation capacity.

Intended Operating Conditions

Electrical ratings are safe operating limits. These ratings are determined by various factors, including dielectric strength, geometry and system operating pressure. Please note that all ISI catalog products are electrically rated for operation with one side in dry atmospheric conditions and the other side in a vacuum environment with a maximum system pressure of 1 x 10-4 Torr. We advise that users make allowances for deviations from stated operating parameters and take adequate safety precautions when feedthroughs are operated at high voltages or high currents.

Ultrahigh & High Vacuum Series — MDC offers three standard vacuum mount styles: Del-Seal; Kwik-Flange; and Weldable. Additional configurations available upon request.

Insulator Seal (ISI) brand catalog and custom engineered ceramic to metal seal products are manufactured to ISO 9001:2008 standard utilizing our qualified hermetic brazing and joining processes.


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