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Do-It-Yourself (DIY) Question & Answer Forum
Discrimination for single-phase residential
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<blockquote data-quote="tony.towa" data-source="post: 22555" data-attributes="member: 1578"><p>Looking at your second posting it would appear that you are considering both discrimination and cascading. Discrimination is to ensure that under fault conditions the circuit breaker directly upstream from the fault opens before the circuit breaker further upstream whereas cascading is a method of "increasing" the fault capability of the protective device downstream by utilising the characteristics of the devices upstream.</p><p></p><p>If you contact any of the major circuit breaker manufacturers (Merlin Gerin, Hager etc) they will send you full cascading and discrimination charts for their products.</p></blockquote><p></p>
[QUOTE="tony.towa, post: 22555, member: 1578"] Looking at your second posting it would appear that you are considering both discrimination and cascading. Discrimination is to ensure that under fault conditions the circuit breaker directly upstream from the fault opens before the circuit breaker further upstream whereas cascading is a method of "increasing" the fault capability of the protective device downstream by utilising the characteristics of the devices upstream. If you contact any of the major circuit breaker manufacturers (Merlin Gerin, Hager etc) they will send you full cascading and discrimination charts for their products. [/QUOTE]
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Discrimination for single-phase residential
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