ABB PPC907BE 3BHE024577R0101使用屏蔽电力电缆
检查电压降。使用变压器数据、起重机供电系统数据、其他用户和
电机峰值电流如数据所示。对于低压供电系统，电阻压降通常是最显著的。
定子电缆中的电压降会限制扭矩，甚至在加速过程中使电机失速。
转子电缆中的电压降可以用作外部电阻器的一部分。转子电缆的电压降
正确选择短路和热应力，相当于悬挂转子0.5至1%的电阻值
电缆和0%电阻值，则电阻接近电机。
对于电压降的计算，可以将以下经验法则用于峰值电流：
3个转子接触器：峰值电流=电机额定电流的200%。
2个转子接触器：峰值电流=电机额定电流的250%。
1或0个转子接触器：峰值电流=电机额定电流的250-300%。
检查电压降后，可能需要修改初步电缆选择。在大多数情况下，压降检查决定了电缆截面。
为了连接额定电流为100 a或以下的晶闸管模块，单芯和三芯电缆都可以
优先使用，而对于较大的晶闸管模块，单芯电缆使安装速度更快。对于其他
电缆，如悬挂系统，可以在方便的地方使用3芯或4芯电缆。
对于炼钢厂的安装，最好选择专为高温设计的电缆，而不是使用建筑
安装电缆并应用折减系数。
悬挂系统中不建议使用屏蔽电力电缆，因为其成本较高且使用寿命较长
在非屏蔽执行中，电缆的类型小于相同电缆的类型。参考：EN 61800-3。
使从转子电阻器到转子接触器的电力电缆尽可能短，并尽可能使用对称的三芯电缆，以保持转子接触器的电感较低。
从转子/转子电阻器到反馈模块DADT 100的电缆应具有短路保护
转子/转子电阻器端。
有关带悬挂系统的起重机布线的更多建议，请参阅安装一章。
Check for voltage drop. Use transformer data, crane supply system data, impact from other consumers and the
motors peak current as in data. For low voltage supply system normally the resistive voltage drop is most significant.
The voltage drop in a stator cable can limit the torque and even stall the motor during acceleration.
The voltage drop in a rotor cable can be used as a part of the external resistor. The voltage drop of a rotor cable
properly selected for short circuit and thermal stress, is equivalent to 0,5 to 1% resistor value for a festooned rotor
cable and 0% resistor value then the resistor is close to the motor.
For calculation of voltage drop following rule of thumb can be used for peak current:
3 rotor contactors: Peak current = 200% of rated motor current.
2 rotor contactors: Peak current = 250% of rated motor current.
1 or 0 rotor contactors: Peak current = 250 - 300% of rated motor current.
After checking the voltage drop, it might be needed to revise the preliminary cable selection. In most cases the voltage drop checks decides the cable section.
To connect Thyristor modules with a rated current of 100 A or less, both single and three core cables could be
used with preference, while for larger thyristor modules single core cables make the installation faster. For other
cables, like the festoon system, 3- or 4-core cables can be used where it is convenient.
For steel mill installation, it is mostly best to select cables designed for high temperature, rather than using building
installation cables and apply reduction factors.
Shielded power cables are not recommended in the festoon system, as the cost is higher and the lifetime of this
type of cable is less than for the same cable in unshielded execution. Ref.: EN 61800-3.
Make the power cable from rotor resistor to the rotor contactor(s) as short as possible and use symmetrical threecore cable when possible to keep the inductance for the rotor contactors low.
The cable from the rotor / rotor resistor to the Feedback Module DADT 100 should have short circuit protection in
the rotor / rotor resistor end.
For more advice for cabling on cranes with festoon systems, see the chapter Installation.
