Electrical Lead-Through Plates for Hydrogen Gas-Cooled Generators

Product Description

Generators provide energy by transforming kinetic energy from turbines into electrical energy. A byproduct of this process is heat, which results in the need for cooling the generator. This is especially so in the case of large power generators. One highly efficient cooling process for large power generators involves the use of Hydrogen (H2). This gas has very good heat removal properties when used as a coolant. However, it is also a highly explosive gas.

We provide safe flange-type electrical feedthroughs for instrumentation and control purpose, as well as thermocouple feedthroughs or combinations of both, to enable the productivity of energy facilities for many decades.

SCHOTT Eternaloc® lead-though plates for hydrogen gas-cooled generators consist mainly of:
  • A steel flange with nickel-iron conductors sealed in by means of compression-seal technique
  • standard electrical feedthroughs with 1 to 406 conductors, allow an optimized construction of the generator’s vessel
  • standard thermo-couple lead-through plates up to 121 thermo-couples
  • sealing between the lead-through plate and the generator, usually accomplished by an O-ring



Advantages

SCHOTT Eternaloc electrical lead-through plates provide a number of unique product features:
  • inorganic and therefore non-aging technology
  • maintenance-free
  • hermetically sealed and thus leak-tight by 10-8 mbar.l/s

Additionally, the high conductor density (with up to 406 conductors per penetration) allows for a reduction in the quantity of penetrations needed.

Applications

These penetrations are required in any type of power plant with high power electrical generators.

Technical Details

Technology

The glass preform, metal shell and conductor pins or tubes for thermo-couples, made of a nickel-iron alloy, are assembled on a fixture. The complete assembly is heated to a temperature where the glass becomes free-flowing and fills all the gaps between the metal parts.

During the cooling process, the glass solidifies at its set point. Upon further cooling, the outer metal housing shrinks more than the glass seal (due to its higher coefficient of thermal expansion), leading to a compressive radial force onto the glass body. This leads to an increased hermeticity and tightness even under high temperature or gas pressure.

After sealing, the parts are cleaned. Standard plating for the flanges is nickel over copper plating.


Features / Specifications

SCHOTT's electrical lead-throughs operate up to
  • 10 bar design pressure (higher pressure can be requested)
  • 400 volt working voltage
  • EEx e certified versions are possible upon request

Forms of Supply and Product Packaging

We can deliver the feedthroughs in accordance to customers’ dimensional requirements. Upon request, we can also deliver sockets and o-rings.
Our products are delivered in dust-safe, moisture-safe, impact-proof transportation boxes.

Quality

SCHOTT Eternaloc lead-through plates are manufactured in our ISO 9001 certified plant. EEx e certified versions are possible upon request.


In addition to standard testing procedures, the pressure and gas tightness, as well as the electrical properties are stringently checked. For more information, please refer to our quality assurance process.
Exhibitions & Events
05.
September
Exhibition CIOE - China International Optoelectronic Expo, Shenzhen, China, 09-05 to 09-08-2018
17.
September
Exhibition Gastech, Barcelona, Spain, 09-17 to 09-20-2018
25.
September
Exhibition European Microwave Week, Madrid, Spain, 09-25 to 09-27-2018
13.
November
Exhibition electronica, Munich, Germany, 11-13 to 11-16-2018
Contact
Electronic Packaging
SCHOTT North America, Inc.

15 Wells Street
Southbridge, MA 01550
USA
E-Mail to SCHOTT+1 (508) 765-7450
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