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Safety requirements |
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Relays with forcibly guided contacts are used in safety-oriented applications for the decoupling of different voltage potentials. These relays permit implemention of self-monitoring systems. Complying with the European standard EN50205, a relay with forcibly guided contacts consists of at least one N.C. and one N.O. contact. |
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Break and make contact must never be closed at the same time during the entire life of the relay. In case of a fault the contact gap must be at least 0.5 mm. Additionally, the insulation values are subject to higher standards and pollution degree 2 is defined for relays with forcibly guided contacts. For the contact spring assemblies and other conducting parts in the relay it must be ensured that no short circuits or conducting connections result in case such parts should ever fracture or become loose. |
