terminations brochure

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3Reliability

High Voltage Power Cable,

Splicing & Terminatingedited by Robert Goodman and William Osborn


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From our earliest endeavors with tapes, adhesives and abrasive minerals over a half-century ago,3M has grown to worldwide recognition in vital technologies. 3M sales offices, laboratoriesand manufacturing plants in a hundred countries research and develop products that meet the

worlds needs. Investments in the hundreds of millions of dollars are made each year in the search forbetter answers that combine dependability with usability.

Introduction

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SEAL TO THE

EXTERNAL

ENVIRONMENTIn order to qualify as a Class 1Termination, the termination mustprovide a seal to the externalenvironment. Both the conductor/lugarea and the shielding cut-back areamust be sealed. These seals keepmoisture out of the cable to preventdegradation of the cable components.Several methods are used to makethese seals such as: factory-madeseals, tape seals (silicone tape must beused for a top seal), and compoundseals. Fig. 57

All terminations are normallygrounded. However, individualcircumstances can exist where it is notdesirable to ground both ends of thecable. The cable shield MUST BEgrounded somewhere in the system.When using solid dielectric cables, itis recommended that solderless

ground connections be used (elimi-nating the danger of over-heatingcable insulation when soldering).

As a general summary, for highlycontaminated and exposed environ-ments or on extremely critical circuits,porcelain or silicone rubber termin-ations are preferred.

For potentially contaminated,moisture-prone areas...most likely themajority of cases...silicone rubberprovides dependable Class 1terminations.

For further information or copies ofreferences contact

3M Electrical Products DivisionP.O. Box 2963Austin, TX 78769-2963512-984-5000

TERMINATIONS

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A ll statements, technical information, andrecommendations related to S ellersproducts are based on informationbelieved to b e reliable, b ut the accuracy orcompleteness thereof is not guaranteed.Before utilizing the product, the usershould determine the suitability of theproduct for its intended use. T he userassumes all risks and liability whatsoeverin connection with such use.

A ny statements or recommendations of theSeller which are not contained in theSellers current publications shall have noforce or effect unless contained in anagreement signed by an authorized officerof Seller. T he statements contained hereinare made i n lieu of all warranties,expressed or implied, including but notlimited to the imp lied warranties ofmerchantability and fitness for a particularpurpose which warranties are herebyexpressly di sclaimed.

SELLER SHALL NO T BE LIABLE TO THEUSER OR ANY O THER PERSON UNDERANY LEGAL THEORY , INCLUD ING BUTNOT L IM ITED TO NEGL IGENCE ORSTRICT LIABILITY, FOR ANY INJURY O RFOR ANY D IRECT OR CO NSEQUENT IALDAMAG ES SUSTAINED OR INCURRED BYREASON O F THE USE OF ANY OF THESELLERS PROD UCTS THAT WEREDEFECTIVE.

Important Notice

Litho in USA .

3M 1996 80-6104-3863-4

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Electrical Products Division6801 River Place Blvd.Austin, TX 78726-9000800/245 3573FAX 800/245 0329

40% Pre-consumer waste paper10% Post-consumer waste paper

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global manufacturer with more than

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and employees committed to delivering

quality products and service to you, our

valued customer. Our capability doesnt

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