DSCA190V 57310001-PK數(shù)字量模塊的產(chǎn)生

所有與轉(zhuǎn)換器直接連接的電力電纜（U1、V1、W1、C1、D1）必須被屏蔽或保持在一起，靠近安裝板，并與其他所有部件分開電纜（包括L1、L2、L3），尤其是來(lái)自未屏蔽信號(hào)的電纜電纜。建議的分離可能性是放置這些安裝板后側(cè)的電源電纜。如果“污染”電纜和其他電纜，特別是信號(hào)電纜的直接交叉

不可避免的是，它們必須是矩形的。16.放置室外電纜

內(nèi)閣電力電纜必須平行且緊密地布置在一起，參見(jiàn)14中的圖紙。必須篩選速度反饋，并且直接沿電機(jī)的電源電纜放置，如果外殼轉(zhuǎn)速表電機(jī)的外殼與馬達(dá)。如果轉(zhuǎn)速表或編碼器外殼與電機(jī)絕緣，則電源和信號(hào)之間的距離電纜是有利的。

歐洲公共低壓線路的額定電壓為400 V

三相之間以及a相和中性點(diǎn)之間的230 V

導(dǎo)體這些電壓由變壓器及其3提供-星形連接的相二次繞組。星形點(diǎn)與中性導(dǎo)線連接，并在變電站接地。電力由4線電纜分配給電力消費(fèi)者。在消費(fèi)者的電纜接頭處

中性導(dǎo)線必須接地（房屋的局部接地或然后將其分為中性線和PE導(dǎo)體。

因此，必須提供帶有中性導(dǎo)線的三相負(fù)載

通過(guò)5線電纜。然而，轉(zhuǎn)換器是三相負(fù)載，其大多數(shù)情況下不需要中性導(dǎo)線。他們可以如圖5.2-1所示，由4線電纜供電

從房屋、工廠外的接地中性導(dǎo)線或工廠至內(nèi)部PE導(dǎo)線和本地接地點(diǎn)

圖中未顯示中間。另見(jiàn)第24節(jié)。

功率限制：見(jiàn)第4節(jié)末尾！

工業(yè)區(qū)19條公共低壓線路

在工業(yè)區(qū)，由轉(zhuǎn)換器引起的噪聲水平允許比包括輕工業(yè)的住宅區(qū)高10dB。因此，保護(hù)目標(biāo)涉及：如果這些電纜符合以下要求，則無(wú)需屏蔽電機(jī)電纜即可滿足EMC要求：根據(jù)14配置。

工業(yè)區(qū)的公共低壓線路可能有自己的線路

供電變壓器如圖5.2-1所示，但通常工業(yè)區(qū)和住宅區(qū)由普通變壓器。這取決于的功耗

兩個(gè)區(qū)域及其距離。功率限制：見(jiàn)第4條末尾！

All power cables which are directly connected with the converter

(U1, V1, W1, C1, D1) must either be screened or be kept close together and close to the mounting plate and separate from all other

cables (L1, L2, L3 included) and especially from unscreened signal

cables. A recommended separation possibility is to place these

power cables at the rear side of the mounting plate. If direct crossings of "polluted" cables and others, especially signal cables, are

inevitable then they must be made rectangular.

16 Placement of

cables outside

the cabinet

The power cables must be arranged parallel and close together,

see drawings in 14. The speed feedback must be screened and

placed directly along the power cables to the motor if the housing

of the tacho machine is electrically connected with the housing of

the motor. If the housing of the tachometer or the encoder is insulated from the motor then a distance between the power and signal

cables is advantageous.The rated voltages of a public European low voltage line are 400 V

between the 3 phases and 230 V between a phase and the neutral

conductor. These voltages are provided by a transformer with its 3-

phase secondary winding in star connection. The star point is connected with the neutral conductor and it is earthed at the transformer station. The electrical power is distributed by 4-wire cables

to the electricity consumers. At a cable stub to a consumer, the

neutral conductor must be earthed (local earth of the house or

plant), and then it is split into a neutral and a PE conductor.

Therefore a 3-phase load with neutral conductor must be supplied

by a 5-wire cable. Converters, however, are 3-phase loads which

do not need the neutral conductor in most cases. They can be

supplied by 4-wire cables as shown in figure 5.2-1. The change

from the earthed neutral conductor outside the house, plant or

factory to the internal PE conductor with the local earthing point

between is not shown in this figure. See also section 24.

Power limitation: see end of section 4!

19 Public low voltage lines in industrial regions

In an industrial region the noise level which is caused by converters

is allowed to be 10 dB higher than in a residential region with included light industry. Therefore the protection targets concerning

EMC can be met without screened motor cables if these cables are

configured according to 14.

A public low voltage line of an industrial region may have an own

supply transformer as shown in figure 5.2-1, but often the lines of

an industrial region and of a residential one are supplied by a

common transformer. This depends on the power consumption of

both regions and on their distance. Power limitation: see end of 4!