DSCA190V 57310001-PK数字量模块的产生

所有与转换器直接连接的电力电缆（U1、V1、W1、C1、D1）必须被屏蔽或保持在一起，靠近安装板，并与其他所有部件分开电缆（包括L1、L2、L3），尤其是来自未屏蔽信号的电缆电缆。建议的分离可能性是放置这些安装板后侧的电源电缆。如果“污染”电缆和其他电缆，特别是信号电缆的直接交叉

不可避免的是，它们必须是矩形的。16.放置室外电缆

内阁电力电缆必须平行且紧密地布置在一起，参见14中的图纸。必须筛选速度反馈，并且直接沿电机的电源电缆放置，如果外壳转速表电机的外壳与马达。如果转速表或编码器外壳与电机绝缘，则电源和信号之间的距离电缆是有利的。

欧洲公共低压线路的额定电压为400 V

三相之间以及a相和中性点之间的230 V

导体这些电压由变压器及其3提供-星形连接的相二次绕组。星形点与中性导线连接，并在变电站接地。电力由4线电缆分配给电力消费者。在消费者的电缆接头处

中性导线必须接地（房屋的局部接地或然后将其分为中性线和PE导体。

因此，必须提供带有中性导线的三相负载

通过5线电缆。然而，转换器是三相负载，其大多数情况下不需要中性导线。他们可以如图5.2-1所示，由4线电缆供电

从房屋、工厂外的接地中性导线或工厂至内部PE导线和本地接地点

图中未显示中间。另见第24节。

功率限制：见第4节末尾！

工业区19条公共低压线路

在工业区，由转换器引起的噪声水平允许比包括轻工业的住宅区高10dB。因此，保护目标涉及：如果这些电缆符合以下要求，则无需屏蔽电机电缆即可满足EMC要求：根据14配置。

工业区的公共低压线路可能有自己的线路

供电变压器如图5.2-1所示，但通常工业区和住宅区由普通变压器。这取决于的功耗

两个区域及其距离。功率限制：见第4条末尾！

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!