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ELESTA relays GmbH produces its relays under the motto "Safety without compromise" |
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This is why the dimensioning of the creepage distance within the relay is steadfastly based on pollution degree 3 which the applicable standards define for conductive pollution. The detailed layout of insulation/isolation barriers can be found in the specifications. |
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Pollution degree 3 |
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Insulation strength (basic insulation, additional insulation, double insulation, reinforced insulation, EEx insulation) depends on the safety levels demanded of the equipment in which the relay is used. Insulation dimensioning is based on pollution degree 3, which is the level required by the EN50205 standard for relays with forcibly guided contacts. ELESTA relays comply rigorously with the standard, because relays with forcibly guided contacts find uses in highly safety-conscious applications. The result is added safety for personnel and plant.
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Maximum insulation strength |
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ELESTA relays GmbH offers relays with the highest degree of insulation. The control side of the relay is separated from the output contacts, and similarly, the output contacts are separated from each other by double or reinforced insulation. In this way "protective separation" for an insulation voltage of > 250V is reached. |
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EEx protection |
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In the standards relating to electronic components for areas where a danger of explosion exists, a creepage distance of > 10 mm is defined for the insulation voltage of < 375V for separating conductive parts. All ELESTA relays GmbH products meet this demand between the control side and the output side of a relay (intrinsically safe electrical circuits in categories "ia" and "ib"; the requirements of the PTB Parts Certificate or relevante EEx protection regulations must be observed).
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