rated voltage & nominal voltage
English translation: rated voltage & nominal voltage
| 12:28 Oct 17, 2007 |
| English language (monolingual) [PRO] Tech/Engineering - Electronics / Elect Eng / Electrical Engineering | |||||||
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|  Selected response from: Jennifer Levey Chile Local time: 02:41 | ||||||
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| Discussion entries: 3 | |
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Answers
22 mins confidence: 
rated = estimated; nominal = minimum Explanation: :) -------------------------------------------------- Note added at 22 mins (2007-10-17 12:51:13 GMT) -------------------------------------------------- From Heritage |
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23 mins confidence: peer agreement (net): +1
peer agreement (net): +1possible explanation Explanation: It's difficult to say much without seeing the entire text, but in the example given it could be that the 'nominal voltage' is the normal operating voltage and the 'rated voltage' is the specified maximum operating voltage. AFAIK this distinction between 'nominal voltage' and 'rated voltage' is not common in component or system specifications. The usual terms are 'rated voltage' and (sometimes) 'test voltage', where the latter is usually higher than the rated voltage and specifies the maximum voltage that can be withstood without failure and/or the voltage used to test the component to ensure a suitable safety margin for operation at the rated voltage. In the usage I am familiar with, 'nominal' is usually used to refer to a design value instead of a rating. |
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28 mins confidence:
rated voltage=voltage for a pience of equipment; nominal voltage=voltage for a system Explanation: the former indicates the voltage for a specific piece of equipment as designed and ascertained by the manufacturer; the latter the voltage for a system, e.g., a circuit, a whole grid etc. Sometimes, or even very often, the two are exchangeable in common use. -------------------------------------------------- Note added at 41 mins (2007-10-17 13:09:57 GMT) -------------------------------------------------- For the paragraph "The nominal voltage is indicated at 170kV. Nevertheless, the nominal voltage shall be equal to 150kV and the rated voltage to 170kV", I think "nominal voltage" means the normal working voltage while "rated voltage" means the maximum voltage for the circuit breaker, once this voltage is reached, the breaker would trip. |
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2 hrs confidence: peer agreement (net): +2
peer agreement (net): +2rated voltage & nominal voltage Explanation: The 'rated voltage' is the maximum voltage that the circuit-breaker can interrupt safely and without being damaged by excessive arcing. The 'nominal voltage' is the voltage for which the circuit-breaker is intended to be used. The nominal voltage must of course be lower than the rated voltage, so there's a satisfactory margin of safety. This margin (difference between the nominal and rated voltages) must be large enough to take account of likely variations in the nominal voltage on the power lines. Note that neither term is concerned with the voltage at which the circuit-breaker trips (and anyway we don't know whether the text refers to over-current or over-voltage breakers...). |
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