Glossary entry (derived from question below)
Czech term or phrase:
ochrana proti přefázování
English translation:
phase-sequence reversal protection
Added to glossary by
Prokop Vantuch
Oct 13, 2007 15:19
16 yrs ago
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Czech term
Czech Republic
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ochrana proti přefázování
Czech to English
Tech/Engineering
Electronics / Elect Eng
heating, ventilation, air-conditioning
Text stejný jako v předchozí otázce.
Kontext:
Všechny nabízené kondenzační jednotky s funkcí tepelného čerpadla jsou vybaveny čtyřcestným ventilem a čidlem odmrazování.
Třífázové jednotky jsou navíc vybaveny topením kompresoru a ochranou proti přefázování.
Kontext:
Všechny nabízené kondenzační jednotky s funkcí tepelného čerpadla jsou vybaveny čtyřcestným ventilem a čidlem odmrazování.
Třífázové jednotky jsou navíc vybaveny topením kompresoru a ochranou proti přefázování.
Proposed translations
(English)
| 4 +2 | phase-sequence reversal protection |
Pavel Blann
|
| 4 +1 | phase reversal protection |
Anton Konashenok
|
| 4 | Wrong phase order protection |
Ing. Jiri Klima
|
| 3 | wrong phase coupling protection |
Igor Liba
|
Proposed translations
+2
4 hrs
Pavel Blann
Czech Republic
Czech Republic
Native in Czech
Specializes in field
Czech Republic
Related KudoZ points
:
28
Selected
phase-sequence reversal protection
in a 3-phase system the _sequence_ of phases must be correct ;)
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Note added at 2 dnů7 h (2007-10-15 23:07:48 GMT)
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to justify that once the phase numbers are assigned they should be adhered to in a well-designed electrical circuit is beyond the scope of kudoz.
but here is a simple example:
* let's say the 3-phase unit in question contains (1) resistance load, (2) capacitance load and (3) inductance load.
* let's assume phase 1 contains no compensation, phase 2 contains capacitance compensation and phase 3 contains inductance compensation.
* then the electrician must connect phase 1 to terminal 1, 2 to 2, and 3 to 3 since putting phases 231 / 312 on terminals 123 is incorrect.
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Note added at 3 dnů7 h (2007-10-16 22:59:06 GMT) Post-grading
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rádo se stalo
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Note added at 2 dnů7 h (2007-10-15 23:07:48 GMT)
--------------------------------------------------
to justify that once the phase numbers are assigned they should be adhered to in a well-designed electrical circuit is beyond the scope of kudoz.
but here is a simple example:
* let's say the 3-phase unit in question contains (1) resistance load, (2) capacitance load and (3) inductance load.
* let's assume phase 1 contains no compensation, phase 2 contains capacitance compensation and phase 3 contains inductance compensation.
* then the electrician must connect phase 1 to terminal 1, 2 to 2, and 3 to 3 since putting phases 231 / 312 on terminals 123 is incorrect.
--------------------------------------------------
Note added at 3 dnů7 h (2007-10-16 22:59:06 GMT) Post-grading
--------------------------------------------------
rádo se stalo
4 KudoZ points awarded for this answer.
Comment: "Diky moc!"
15 mins
wrong phase coupling protection
tu je jeden tip
Reference:
http://www.indianrailways.gov.in/FinanceCode/ACTraction-II-P-II/AcTractionIIAppendix5.htm
33 mins
Ing. Jiri Klima
Czech Republic
Czech Republic
Native in Czech
Works in field
Czech Republic
Related KudoZ points
:
16
Wrong phase order protection
Jde o nesprávné pořadí fází a to se vyjádří slovem ORDER.
Peer comment(s):
| neutral |
Igor Liba
: prefazovanie nie je nespravne poradie pripojenia ale nespravne spojenie
1 hr
|
+1
43 mins
Anton Konashenok
Czech Republic
Czech Republic
Native in English
Works in field
Czech Republic
Competing on quality, not on price
Native in: Russian 
, English
Works in: French to English, Czech to English, Danish to English, and 10 more.
Related KudoZ points
:
16
phase reversal protection
Phase order may only be normal or reversed.
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Note added at 22 hrs (2007-10-14 13:55:25 GMT)
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To explain in more detail: there is no way to identify a given phase as "no. 1", there is only a CYCLIC order of phases, which is either 123123123... or 321321321...
When we see phase numbers on a switchboard, these are just arbitrarily assigned numbers of wires, nothing more.
--------------------------------------------------
Note added at 22 hrs (2007-10-14 13:55:25 GMT)
--------------------------------------------------
To explain in more detail: there is no way to identify a given phase as "no. 1", there is only a CYCLIC order of phases, which is either 123123123... or 321321321...
When we see phase numbers on a switchboard, these are just arbitrarily assigned numbers of wires, nothing more.
Peer comment(s):
| agree |
vic voskuil
18 hrs
|
| neutral |
Pavel Blann
: if there were 2 phases and the correct order was 12 then 21 would be a reversal. for a 3-phase system, this is overtly simplified. // if you put phase 3 or 2 on terminal 1 you're asking for trouble // good point, too, but such a protection is possible now
19 hrs
|
|
No, that's TOTALLY wrong. 123, 231 and 312 are ONE AND THE SAME sequence, and the opposite one is 321 = 213 = 132. // You have a point, but no protection circuit will protect against that.
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