产品介绍Product introduction
产品信息产品类别：模块卡件
品牌：DCS、PLC
电话：15270269218
联系人：叶经理
质保期：1年
加工定制：不可定制
产地/厂家：美国
产品实拍图Product picture
由于驱动器的
接地泄漏电流。问题可能是：
如果设备不可用，则解决
接地的。
③
如果外部设备共享
与驱动器相同的交流电源
驱动器的噪声可能会沿
其输入电源电缆
对其他外部设备造成干扰跳闸
设备采取以下操作：
解决此问题：在
驱动器的输入侧，并使用
隔离变压器或线路滤波器
防止噪音干扰
外部设备。
④⑤⑥
如果测量仪表的信号电缆，
无线电设备和传感器包括：
与安装在机柜中的
驱动器，这些设备电缆将
易受干扰的。采取以下行动：
为了解决这个问题：
（1） 设备和信号电缆
应该尽可能远离
驱动器。信号电缆应为：
屏蔽，屏蔽层应：
接地。信号电缆应：
放置在金属管内，并应
尽可能远离
驱动器的输入/输出电缆。如果
信号电缆必须跨越电源
电缆，应放置在右侧
彼此成角度。
（2） 安装无线电噪声滤波器和线性
噪声滤波器（铁氧体共模扼流圈）
在驱动器的输入和输出处：
抑制功率的发射噪声
线
（3） 电机电缆应放置在
管厚大于2mm或埋在
水泥管道。电力电缆应：
放置在金属管内，然后
屏蔽层接地（电机电缆
应为4芯电缆，其中
芯线应连接至PE
驱动器和另一个应该是
连接到电机外壳）。
噪音
排放
路径
降低噪音的措施
①⑦⑧
不要并行布线信号电缆
与电力电缆或捆绑这些
电缆连接在一起，因为感应
电磁噪声和感应ESD
噪声可能干扰信号电缆。
还应定位其他设备
尽可能远离驱动器。
应放置信号电缆
在金属管内，应放置
尽可能远离
驱动器的输入/输出电缆。这个
信号电缆和电力电缆应：
是屏蔽电缆。电磁干扰
如果可能，将进一步减少
放置在金属管内。净空
金属管之间应在
至少20cm。
3.4.2现场接线
控制电缆、输入电源电缆和电机电缆
应单独安装，并留有足够的间隙
应留在电缆之间，尤其是当
电缆平行敷设，电缆长度大。如果
信号电缆必须穿过电力电缆，
它们应该相互垂直。
如果电机电缆过长，应降低其额定值
或者它们的横截面积（CSA）太大。驱动器
电缆应为具有规定CSA的电缆（参见
表3-1），因为电缆的电容
接地与电缆的CSA成比例。如果电缆
使用大CSA时，应减小其电流。
屏蔽/铠装电缆：高频低
应使用阻抗屏蔽电缆。例如：
铜网、铝网或铁网。uisance tripping due to the drive’s
earth leakage current. The problem can
be solved if the equipment is not
grounded.
③
If the external equipment shares the
same AC supply with the drive, the
drive’s noise may be transmitted along
its input power supply cables, which may
cause nuisance tripping to other external
equipment. Take the following actions to
solve this problem: Install noise filter at
the input side of the drive, and use an
***lation transformer or line filter to
prevent the noise from disturbing the
external equipment.
④⑤⑥
If the signal cables of measuring meters,
radio equipment and sensors are
installed in a cabinet together with the
drive, these equipment cables will be
easily disturbed. Take the actions below
to solve the problem:
(1)The equipment and the signal cables
should be as far away as possible from
the drive. The signal cables should be
shielded and the shielding layer should
be grounded. The signal cables should
be placed inside a metal tube and should
be located as far away as possible from
the input/output cables of the drive. If the
signal cables must cross over the power
cables, they should be placed at right
angle to one another.
(2) Install radio noise filter and linear
noise filter (ferrite common-mode choke)
at the input and output of the drive to
suppress the emission noise of power
lines.
(3) Motor cables should be placed in a
tube thicker than 2mm or buried in a
cement conduit. Power cables should be
placed inside a metal tube and be
grounded by shielding layer (Motor cable
should be a 4-core cable, where one
core should be connected to the PE of
the drive and another should be
connected to the motor’s enclosure).
Noise
emission
paths
Actions to reduce the noise
①⑦⑧
Don’t route the signal cables in parallel
with the power cables or bundle these
cables together because the induced
electro-magnetic noise and induced ESD
noise may disturb the signal cables.
Other equipment should also be located
as far away as possible from the drive.
The signal cables should be placed
inside a metal tube and should be placed
as far away as possible from the
input/output cables of the drive. The
signal cables and power cables should
be shielded cables. EMC interference
will be further reduced if they could be
placed inside metal tubes. The clearance
between the metal tubes should be at
least 20cm.
3.4.2 Field Wire Connections
Control cables, input power cables and motor cables
should be installed separately, and enough clearance
should be left among the cables, especially when the
cables are laid in parallel and the cable length is big. If
the signal cables must go through the power cables,
they should be vertical to each other.
The motor cables should be derated if they are too long
or their cross sectional area (CSA) is too big. The drive’s
cables should be the cables with specified CSA (See
Table 3-1) because the capacitance of the cable to
ground is in proportional to the cable’s CSA. If the cable
with big CSA is used, its current should be reduced.
Shielded/armoured cable: High frequency low
impedance shielded cable should be used. For example:
Copper net, aluminum net or iron net.
