檢查電壓降。使用變壓器數(shù)據(jù)、起重機供電系統(tǒng)數(shù)據(jù)、其他用戶和

電機峰值電流如數(shù)據(jù)所示。對于低壓供電系統(tǒng)，電阻壓降通常是最顯著的。

定子電纜中的電壓降會限制扭矩，甚至在加速過程中使電機失速。

轉(zhuǎn)子電纜中的電壓降可以用作外部電阻器的一部分。轉(zhuǎn)子電纜的電壓降

正確選擇短路和熱應(yīng)力，相當于懸掛轉(zhuǎn)子0.5至1%的電阻值

電纜和0%電阻值，則電阻接近電機。

對于電壓降的計算，可以將以下經(jīng)驗法則用于峰值電流：

3個轉(zhuǎn)子接觸器：峰值電流=電機額定電流的200%。

2個轉(zhuǎn)子接觸器：峰值電流=電機額定電流的250%。

1或0個轉(zhuǎn)子接觸器：峰值電流=電機額定電流的250-300%。

檢查電壓降后，可能需要修改初步電纜選擇。在大多數(shù)情況下，壓降檢查決定了電纜截面。

為了連接額定電流為100 a或以下的晶閘管模塊，單芯和三芯電纜都可以

優(yōu)先使用，而對于較大的晶閘管模塊，單芯電纜使安裝速度更快。對于其他

電纜，如懸掛系統(tǒng)，可以在方便的地方使用3芯或4芯電纜。

對于煉鋼廠的安裝，最好選擇專為高溫設(shè)計的電纜，而不是使用建筑

安裝電纜并應(yīng)用折減系數(shù)。

懸掛系統(tǒng)中不建議使用屏蔽電力電纜，因為其成本較高且使用壽命較長

在非屏蔽執(zhí)行中，電纜的類型小于相同電纜的類型。參考：EN 61800-3。

使從轉(zhuǎn)子電阻器到轉(zhuǎn)子接觸器的電力電纜盡可能短，并盡可能使用對稱的三芯電纜，以保持轉(zhuǎn)子接觸器的電感較低。

從轉(zhuǎn)子/轉(zhuǎn)子電阻器到反饋模塊DADT 100的電纜應(yīng)具有短路保護

轉(zhuǎn)子/轉(zhuǎn)子電阻器端。

有關(guān)帶懸掛系統(tǒng)的起重機布線的更多建議，請參閱安裝一章。

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.