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French to English translations [PRO] Tech/Engineering - Engineering (general) / puissance nominale
French term or phrase:arrière
Hi,
I think this may be 'reverse', but help needed!
Concerning a generator:
Puissance nominale:
La puissance nominale requise est de 15 kW en monophasé 230 V, ou 15 kW triphasé 400 V avec simultanement 3 kW minimum en mono-phasé 230 V, à 50 Hz, sous cos (symbol for cos) 0,8 arrière, et dans les conditions normales d'emploi.
Explanation: Medium confidence. Tony understands these things better than I.
The business about a lagging power factor being less than 1.0 makes this look especially likely. However, I have seen power factors of 0.8 many times before, with no mention of "arrière"; I suppose though that if one gives the actual factor, it is immediately obvious to those in the know whether it is leading or lagging.
Lagging Power Factor
Lagging power factor in AC circuits (a power factor of less than 1.0) is caused by inductive loads, such as motors and transformers, which cause the current to lag behind the voltage. See Power Factor
Leading Power Factor
Leading power factor in AC circuits (0.0 to -1.0) is caused by capacitive loads or overexcited synchronous motors which cause the current to lead the voltage. See Power Factor. http://www.cumminspower.com/na/technical/glossary/
power factor: In alternating-current power transmission and distribution, the cosine of the phase angle between the voltage and current. Note 1: When the load is inductive, e.g., an induction motor, the current lags the applied voltage, and the power factor is said to be a lagging power factor. When the load is capacitive, e.g., a synchronous motor or a capacitive network, the current leads the applied voltage, and the power factor is said to be a leading power factor. Note 2: Power factors other than unity have deleterious effects on power transmission systems, including excessive transmission losses and reduced system capacity. Power companies therefore require customers, especially those with large loads, to maintain, within specified limits, the power factors of their respective loads or be subject to additional charges. http://www.atis.org/tg2k/_power_factor.html
You might find too that what you have is not "cos (symbol for cos)" but "cos (symbol for phi)". "Cos" = cosine and TTBOMK does not have a symbol: phi is a Greek letter and does (well, not so much a "symbol" as a letter of the Greek alphabet).
Appears "negative cos phi" is also said:
Power factor of an Inductive type circuit, in which the current lags behind the source voltage (negative cos phi) ... www.upsonnet.com/
I imagine this is not actually negative, but less than unity as above.
-------------------------------------------------- Note added at 2 hrs (2007-01-13 17:56:28 GMT) --------------------------------------------------
Oops! I misread some of the above/ "negative cos phi" DOES exist (I was thinking lagging PF < 1, leading PF = >1, whereas in fact the values are <1 (but greater than 0) and >-1 (but less than 0).
I was completely barking up the wrong tree with the symbol - I was thinking along the lines of reverse cos! I am a little confused to how to form a reliable sentance out of 'sous cos (symbol) 0,8 arriere'... how should I approach it?
Please note that the symbol φ is in fact the lower-case Greek letter "phi", and is not short for cosine, but for "phase angle"
Automatic update in 00:
Answers
1 hr confidence: peer agreement (net): +4
lagging
Explanation: Medium confidence. Tony understands these things better than I.
The business about a lagging power factor being less than 1.0 makes this look especially likely. However, I have seen power factors of 0.8 many times before, with no mention of "arrière"; I suppose though that if one gives the actual factor, it is immediately obvious to those in the know whether it is leading or lagging.
Lagging Power Factor
Lagging power factor in AC circuits (a power factor of less than 1.0) is caused by inductive loads, such as motors and transformers, which cause the current to lag behind the voltage. See Power Factor
Leading Power Factor
Leading power factor in AC circuits (0.0 to -1.0) is caused by capacitive loads or overexcited synchronous motors which cause the current to lead the voltage. See Power Factor. http://www.cumminspower.com/na/technical/glossary/
power factor: In alternating-current power transmission and distribution, the cosine of the phase angle between the voltage and current. Note 1: When the load is inductive, e.g., an induction motor, the current lags the applied voltage, and the power factor is said to be a lagging power factor. When the load is capacitive, e.g., a synchronous motor or a capacitive network, the current leads the applied voltage, and the power factor is said to be a leading power factor. Note 2: Power factors other than unity have deleterious effects on power transmission systems, including excessive transmission losses and reduced system capacity. Power companies therefore require customers, especially those with large loads, to maintain, within specified limits, the power factors of their respective loads or be subject to additional charges. http://www.atis.org/tg2k/_power_factor.html
You might find too that what you have is not "cos (symbol for cos)" but "cos (symbol for phi)". "Cos" = cosine and TTBOMK does not have a symbol: phi is a Greek letter and does (well, not so much a "symbol" as a letter of the Greek alphabet).
Appears "negative cos phi" is also said:
Power factor of an Inductive type circuit, in which the current lags behind the source voltage (negative cos phi) ... www.upsonnet.com/
I imagine this is not actually negative, but less than unity as above.
-------------------------------------------------- Note added at 2 hrs (2007-01-13 17:56:28 GMT) --------------------------------------------------
Oops! I misread some of the above/ "negative cos phi" DOES exist (I was thinking lagging PF < 1, leading PF = >1, whereas in fact the values are <1 (but greater than 0) and >-1 (but less than 0).
xxxBourth Local time: 23:32 Specializes in field Native speaker of: English PRO pts in category: 1054
Grading comment
Thank you to both Tony and Bourth. Your info was really helpful.
The translation workplace 
peer agreement (net): +4
