internal sense

உள் உணர்வு

 

НКУ с устройствами ограничения воздействия внутренней дуги
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[Интент]

Параллельные тексты EN-RU

Assemblies equipped with devices limiting internal arc effects (active protection)

A design philosophy which is completely different from that just considered consists in guaranteeing the resistance to internal arcing by installing devices limiting the arc.

The approaches in that direction can be of two different types:
• limiting the destructive effects of the arc, once it has occured, by means of arc detectors
• limiting the destructive effects of the arc, once it has occured, by means of overpressure detectors.

The first possibility consists in installing in the assembly arc detectors which sense the light flux associated with the electric arc phenomenon.

Once the arc has been detected, these devices send an opening signal to the incoming circuit-breaker, thus guaranteeing tripping times of the order of 1-2 ms, therefore shorter than those proper of the circuit-breaker.

The operating logic of an arc detector is the following: the occurrence of an arc inside the switchboard is detected by the arc detector because an intense light radiation is associated with this phenomenon.

The arcing control system detects the event and sends a tripping signal to the circuit-breaker.

All the above with trip times of a few milliseconds and supplanting the tripping of the CB overcurrent relay which, for example, could be delayed due to current selectivity questions.

Figure 1 shows the possible positions where this device can be installed inside a switchboard.

The ideal solution is that which provides the installation of at least one detector for each column, with the consequent reduction to a minimum of the length of the optical fibers carrying the signal.

In order to prevent from an unwanted tripping caused by light sources indepent of the arc (lamps, solar radiation etc.), an additional current sensor is often positioned at the incoming of the main circuit-breaker.

Only in the event of an arc, both the incoming sensor which detects an “anomalous” current due to the arc fault as well as the sensor detecting the light radiation as sociated with the arc enable the system to intervene and allow the consequent opening of the circuit-breaker.

The second possibility consists in installing overpressure sensors inside the switchboard.

As previously described, the overpressure wave is one of the other effects occurring inside an assembly in case of arcing.

As a consequence it is possible to install some pressure sensors which are able to signal the pressure peak associated with the arc ignition with a delay of about 10-15 ms.

The signal operates on the supply circuit-breaker without waiting for the trip times of the selectivity protections to elapse, which are necessarily longer.

Such a system does not need any electronic processing device, since it acts directly on the tripping coil of the supply circuit-breaker.

Obviously it is essential that the device is set at fixed trip thresholds.

When an established internal overpressure is reached, the arc detector intervenes.

However, it is not easy to define in advance the value of overpressure generated by an arc fault inside a switchboard.

[ABB]

НКУ с устройствами ограничения воздействия внутренней дуги (активная защита)

Для решения этой задачи используются совершенно другие, отличающиеся от ранее рассмотренных, принципы, заключающиеся в том, что противодействие внутренней дуге обеспечивается применением устройств, ограничивающих саму дугу.

Существует два типа решения проблемы в этом направлении:
• ограничение разрушающего воздействия дуги после того, как ее обнаружат специальные устройства
• ограничение разрушающего воздействия дуги после того, как специальные устройства обнаружат возникновение избыточного давления.

В первом случае в НКУ устанавливают устройства обнаружения дуги, реагирующие на световой поток, сопровождающий явление электрической дуги.

При обнаружении дуги данные устройства посылают сигнал управления на размыкание вводного автоматического выключателя. Гарантируемое время реакции составляет 1-2 мс, что меньше времени срабатывания автоматического выключателя.

Логика работы устройства обнаружения дуги следующая: Дуга, возникшая внутри НКУ, обнаруживается датчиком, реагирующим на интенсивное световое излучение, которым сопровождается горение дуги.

Обнаружив дугу, система управления посылает сигнал автоматическому выключателю.

Время срабатывания датчика и системы управления составляет несколько миллисекунд, что меньше времени срабатывания автоматического выключателя, осуществляющего защиту от сверхтока, который обычно для обеспечения требуемой селективности срабатывает с задержкой.

На рис. 1 показаны места возможной установки устройства защиты внутри НКУ.

Идеальным решением является установка, по крайней мере, одного устройства защиты в каждый шкаф многошкафного НКУ.

Это позволит до минимума сократить длину оптоволоконных кабелей передачи сигнала.

Для предотвращения ложного срабатывания от других источников света (т. е. не от дуги), например, таких как лампы, солнечное излучение и т. п., дополнительно в главной цепи вводного автоматического выключателя устанавливают датчик тока.

Только при наличии двух событий, а именно: срабатывания датчика света и обнаружения аномального увеличения тока, система управления считает, что возникла электрическая дуга и подает команду на отключение вводного автоматического выключателя.

Второе решение заключается в установке внутри НКУ датчика избыточного давления.

Как было описано ранее, одним из характерных проявлений электрической дуги, возникшей внутри НКУ, является ударная волна.

Это означает, что можно установить несколько датчиков давления, задачей которых является обнаружение импульса давления (с задержкой 10…15 мс), обусловленного зажиганием дуги.

Сигнал от датчиков давления поступает на вводной автоматический выключатель, который срабатывает без задержки на обеспечение селективности.

Такая система не нуждается в электронном устройстве обработки информации, поскольку воздействует непосредственно на независимый расцепитель автоматического выключателя.

Вполне понятно, что такое устройство имеет фиксированный порог срабатывания.

Датчик-реле дуги сработает, как только будет достигнуто заданное значение избыточного давления.

Следует иметь в виду, что не так легко заранее определить значение избыточного давления, которое будет создано при зажигании дуги внутри НКУ.

[Перевод Интент]

Тематики

• НКУ (шкафы, пульты,...)

EN

• assembly equipped with devices limiting internal arc effects

Религия: асрава

   1) The Knowledge of Ourselves

   We come therefore now to that knowledge whereunto the ancient oracle directeth us, which is the knowledge of ourselves; which deserveth the more accurate handling, by how much it toucheth us more nearly. This knowledge, as it is the end and term of natural philosophy in the intention of man, so notwithstanding it is but a portion of natural philosophy in the continent of nature.... [W]e proceed to human philosophy or Humanity, which hath two parts: the one considereth man segregate, or distributively; the other congregate, or in society. So as Human philosophy is either Simple and Particular, or Conjugate and Civil. Humanity Particular consisteth of the same parts whereof man consisteth; that is, of knowledges which respect the Body, and of knowledges that respect the Mind... how the one discloseth the other and how the one worketh upon the other... [:] the one is honored with the inquiry of Aristotle, and the other of Hippocrates. (Bacon, 1878, pp. 236-237)

   2) As a Science, Psychology Is Distinct

   The claims of Psychology to rank as a distinct science are... not smaller but greater than those of any other science. If its phenomena are contemplated objectively, merely as nervo-muscular adjustments by which the higher organisms from moment to moment adapt their actions to environing co-existences and sequences, its degree of specialty, even then, entitles it to a separate place. The moment the element of feeling, or consciousness, is used to interpret nervo-muscular adjustments as thus exhibited in the living beings around, objective Psychology acquires an additional, and quite exceptional, distinction. (Spencer, 1896, p. 141)

   3) Psychology Can Never Be an Exact Natural Science

   Kant once declared that psychology was incapable of ever raising itself to the rank of an exact natural science. The reasons that he gives... have often been repeated in later times. In the first place, Kant says, psychology cannot become an exact science because mathematics is inapplicable to the phenomena of the internal sense; the pure internal perception, in which mental phenomena must be constructed,-time,-has but one dimension. In the second place, however, it cannot even become an experimental science, because in it the manifold of internal observation cannot be arbitrarily varied,-still less, another thinking subject be submitted to one's experiments, comformably to the end in view; moreover, the very fact of observation means alteration of the observed object. (Wundt, 1904, p. 6)

   4) How a " Mathematical" Psychology May Be Realized in Practice

   It is [Gustav] Fechner's service to have found and followed the true way; to have shown us how a "mathematical psychology" may, within certain limits, be realized in practice.... He was the first to show how Herbart's idea of an "exact psychology" might be turned to practical account. (Wundt, 1904, pp. 6-7)

   5) The Rights of Psychology as Science

   "Mind," "intellect," "reason," "understanding," etc. are concepts... that existed before the advent of any scientific psychology. The fact that the naive consciousness always and everywhere points to internal experience as a special source of knowledge, may, therefore, be accepted for the moment as sufficient testimony to the rights of psychology as science.... "Mind," will accordingly be the subject, to which we attribute all the separate facts of internal observation as predicates. The subject itself is determined p. 17) wholly and exclusively by its predicates. (Wundt, 1904,

   6) The Study of Animal Psychology

   The study of animal psychology may be approached from two different points of view. We may set out from the notion of a kind of comparative physiology of mind, a universal history of the development of mental life in the organic world. Or we may make human psychology the principal object of investigation. Then, the expressions of mental life in animals will be taken into account only so far as they throw light upon the evolution of consciousness in man.... Human psychology... may confine itself altogether to man, and generally has done so to far too great an extent. There are plenty of psychological text-books from which you would hardly gather that there was any other conscious life than the human. (Wundt, 1907, pp. 340-341)

   7) The Behaviorist's Formulation

   The Behaviorist began his own formulation of the problem of psychology by sweeping aside all medieval conceptions. He dropped from his scientific vocabulary all subjective terms such as sensation, perception, image, desire, purpose, and even thinking and emotion as they were subjectively defined. (Watson, 1930, pp. 5-6)

   8) Man Is a Microcosm

   According to the medieval classification of the sciences, psychology is merely a chapter of special physics, although the most important chapter; for man is a microcosm; he is the central figure of the universe. (deWulf, 1956, p. 125)

   9) Brief Overview of Psychology's History

   At the beginning of this century the prevailing thesis in psychology was Associationism.... Behavior proceeded by the stream of associations: each association produced its successors, and acquired new attachments with the sensations arriving from the environment.

   In the first decade of the century a reaction developed to this doctrine through the work of the Wurzburg school. Rejecting the notion of a completely self-determining stream of associations, it introduced the task ( Aufgabe) as a necessary factor in describing the process of thinking. The task gave direction to thought. A noteworthy innovation of the Wurzburg school was the use of systematic introspection to shed light on the thinking process and the contents of consciousness. The result was a blend of mechanics and phenomenalism, which gave rise in turn to two divergent antitheses, Behaviorism and the Gestalt movement. The behavioristic reaction insisted that introspection was a highly unstable, subjective procedure.... Behaviorism reformulated the task of psychology as one of explaining the response of organisms as a function of the stimuli impinging upon them and measuring both objectively. However, Behaviorism accepted, and indeed reinforced, the mechanistic assumption that the connections between stimulus and response were formed and maintained as simple, determinate functions of the environment.

   The Gestalt reaction took an opposite turn. It rejected the mechanistic nature of the associationist doctrine but maintained the value of phenomenal observation. In many ways it continued the Wurzburg school's insistence that thinking was more than association-thinking has direction given to it by the task or by the set of the subject. Gestalt psychology elaborated this doctrine in genuinely new ways in terms of holistic principles of organization.

   Today psychology lives in a state of relatively stable tension between the poles of Behaviorism and Gestalt psychology.... (Newell & Simon, 1963, pp. 279-280)

    10) Psychological Research Is Not Building toward Systematic Clarity

   As I examine the fate of our oppositions, looking at those already in existence as guide to how they fare and shape the course of science, it seems to me that clarity is never achieved. Matters simply become muddier and muddier as we go down through time. Thus, far from providing the rungs of a ladder by which psychology gradually climbs to clarity, this form of conceptual structure leads rather to an ever increasing pile of issues, which we weary of or become diverted from, but never really settle. (Newell, 1973b, pp. 288-289)

    11) Psychology as a Scientific Discipline

   The subject matter of psychology is as old as reflection. Its broad practical aims are as dated as human societies. Human beings, in any period, have not been indifferent to the validity of their knowledge, unconcerned with the causes of their behavior or that of their prey and predators. Our distant ancestors, no less than we, wrestled with the problems of social organization, child rearing, competition, authority, individual differences, personal safety. Solving these problems required insights-no matter how untutored-into the psychological dimensions of life. Thus, if we are to follow the convention of treating psychology as a young discipline, we must have in mind something other than its subject matter. We must mean that it is young in the sense that physics was young at the time of Archimedes or in the sense that geometry was "founded" by Euclid and "fathered" by Thales. Sailing vessels were launched long before Archimedes discovered the laws of bouyancy [ sic], and pillars of identical circumference were constructed before anyone knew that C IID. We do not consider the ship builders and stone cutters of antiquity physicists and geometers. Nor were the ancient cave dwellers psychologists merely because they rewarded the good conduct of their children. The archives of folk wisdom contain a remarkable collection of achievements, but craft-no matter how perfected-is not science, nor is a litany of successful accidents a discipline. If psychology is young, it is young as a scientific discipline but it is far from clear that psychology has attained this status. (Robinson, 1986, p. 12)

(French) Deja-vu, internal sense of a person as though he has already experienced the present situation at some point in his past

deja-vu, internal sense of a person as though he has already experienced the present situation at some point in his past

deja-vu, internal sense of a person as though he has already experienced the present situation at some point in his past

augŭrĭum, ii, n. (plur. augura, heterocl., like aplustra from aplustre, Att. ap. Non. p. 488, 2, or Trag. Rel. p. 217 Rib.) [augur], the observation and interpretation of omens, augury (v. augur and the pass. there cited).

Lit.:

pro certo arbitrabor sortes oracla adytus augura? Att., Trag. Rel. p. 217 Rib.: agere,

Varr. L. L. 6, § 42 Müll.; Cic. Div. 1, 17, 32; id. Off. 3, 16, 66:

capere,

Suet. Aug. 95:

quaerere,

Vulg. Num. 24, 1:

observare,

ib. Deut. 18, 10; ib. 4 Reg. 21, 6:

non est augurium in Jacob,

ib. Num. 23, 23:

dare,

Ov. Tr. 3, 1, 36:

nuntiare,

Liv. 1, 7:

decantare,

Cic. Div. 1, 47, 105: accipere, to understand or receive as an omen, Liv. 1, 34; 10, 40; Val. Fl. 1, 161:

augurium factum,

Suet. Vit. 18:

augurio experiri aliquid,

Flor. 1, 5, 3: augurium salutis, an augury instituted in time of peace, for the inquiry whether one could supplicate the Deity for the prosperity of the state (de salute), Cic. Div. 1, 47, 105; Suet. Aug. 31; Tac. A. 12, 23; cf. Dio Cass. 37, 24, and Fabric. ad h. l.—

Transf.

Any kind of divination, prophecy, soothsaying, interpretation:

auguria rerum futurarum,

Cic. Phil. 2, 35, 89: conjugis augurio ( by the interpretation of [p. 205] quamquam Titania mota est, Ov. M. 1, 395: Divinatio arroris et auguria mendacia vanitas est, Vulg Eccli. 34, 5.—And transf. to the internal sense. presentiment, foreboding of future occurrences inhaeret in mentibus quasi saeclorum quoddam augurium futurorum, Cic. Tusc. 1, 15, 33; id. Fam 6, 6:

Fallitur augurio spes bona saepe suo,

Ov. H. 16, 234:

Auguror, nec me fallit augurium, historias tuas immortales futuras,

Plin. Ep. 7, 33, 1 al. —

Object, a sign, omen, token, prognostic:

thymum augurium mellis est,

Plin. 21, 10, 31, § 56:

augurium valetudinis ex eā traditur, si etc.,

id. 28, 6, 19, § 68.—

The art of the augur, augury:

cui laetus Apollo Augurium citharamque dabat,

Verg. A. 12, 394 (v. Apollo and augur):

Rex idero et regi Turno gratissimus augur,

id. ib. 9, 327; Flor. 1, 5, 2.

augŭror, ātus. 1, v. dep. (class. for the ante-class. and poet. act. augnro, āre, v. infra) [augur].

To perform the services or fill the office of an augur, to take auguries, observs and interpret omens, to augur, prophesy, predict (hence with the acc. of that which is prophesied):

Calchas ex passerum numero belli Trojani annos auguratus est,

Cic. Div 1, 33, 72; so id. ib. 1, 15, 27; id. Fam. 6, 6:

avis quasdam rerum augurandarum causa esse natas putamus,

id. N D. 2, 64, 160; Suet. Oth 7 fin.; id. Gram. 1:

in quo (scypho) augurari solet,

Vulg. Gen. 44, 5:

augurandi scientia,

ib. ib. 44, 15; ib. Lev. 19, 26.—Transf from the sphere of religion,

Ingen, to predict, forebode, foretell; or of the internal sense (cf. augurium, II. A.), to surmise, conjecture, suppose:

Theramenes Critiae, cui venenum praebiberat, mortem est auguratus,

Cic. Tusc. 1, 40, 96:

ex nomine istins, quid in provinciā facturus esset, perridicule homines augurabantur,

id. Verr. 2, 2, 6:

in Persis augurantur et divinant Magi,

id. Div. 1, 41, 90: Recte auguraris de me nihil a me abesse longius crudelitate, Caes. ap. Cic. Att. 9, 16, A:

futurae pugnae fortunam ipso cantu augurantur,

Tac. G. 3 al.:

quantum ego opinione auguror,

Cic. Mur. 31, 65:

quantum auguror coniectura,

id. de Or. 1, 21. 95; so,

mente aliquid, Curt 10, 5, 13: Hac ego contentus auguror esse deos,

Ov. P. 3, 4, 80:

erant, qui Vespasianum et arma Orientis augurarentur,

Tac. H. 1, 50:

Macedones iter jaciendo operi monstrāsse eam (beiuam) augurabantur,

Curt. 4, 4, 5.

subordinate form auguro, āre (by Plin. ap. Serv. ad Verg A. 7, 273, erroneously distinguished from this in signif.).

(Acc. to I.) Sacerdotes salutem populi auguranto, Cic. Leg. 2, 8.— Trop.: oculis investigans astute augura, look carefully around you like an augur, Plant. Cist. 4, 2, 26.— Pass.: res, locus auguratur, is consecrated by auguries: certaeque res augurantur, Lucius Caesar ap. Prisc. p. 791 P.:

in Rostris, in illo augurato templo ac loco,

Cic. Vatin. 10; so Liv. 8, 5: augurato ( abl. absol.), after taking auguries (cf. auspicato under auspicor fin.):

sicut Romulus augurato in urbe condenda regnum adeptus est,

Liv. 1, 18; Suet. Aug. 7 fin. dub. Roth.—

(Acc. to II.) Hoc conjecturā auguro, Enn. ap. Non. p. 469, 8 (Trag. v. 327 Vahl.); so Pac. ap. Non. l. l.; Att. ib.;

Cic. Rep. Fragm. ib. (p. 431 Moser): praesentit animus et augurat quodam modo, quae futura sit suavitas, id. Ep. ad Caiv. ib. (IV. 2, p. 467 Orell.): si quid veri mens augurat,

Verg. A. 7, 273:

quis non prima repellat Monstra deum longosque sibi mon auguret annos?

Val. Fl. 3, 356.