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3RT1044-3XB40-0LA2 参数 Datasheet PDF下载

3RT1044-3XB40-0LA2图片预览
型号: 3RT1044-3XB40-0LA2
PDF下载: 下载PDF文件 查看货源
内容描述: 接触器,支持扩展公差0.7 ... 1.25× ,为铁路应用 [Contactors with Extended Tolerance 0.7 ... 1.25 x , for Railway Applications]
分类和应用:
文件页数/大小: 76 页 / 1473 K
品牌: SIEMENS [ Siemens Semiconductor Group ]
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Accessories and Spare Parts  
For 3RT, 3RH Contactors and Contactor Relays  
Accessories for 3RT, 3RH contactors and  
contactor relays  
If the command devices are upstream of the OFF-delay device  
4000 V  
in the circuit, the OFF-delay takes effect with every opening  
operation. If the opening operation is downstream of the OFF-  
V
delay device, an OFF-delay only applies in the event of failure of  
the mains voltage.  
Operation  
In the case of the versions for rated control supply voltages of  
110 V and 230 V, either AC voltage or DC voltage can be applied  
on the line side, whereas the variant for 24 V is designed for  
DC operation only.  
400 V  
500 ms  
t
A DC-operated contactor is connected to the output in  
accordance with the input voltage that is applied.  
Capacitive input to various analog and digital signals makes it  
necessary to suppress interference in the load circuit.  
The mean value of the OFF-delay is approximately 1.5 times the  
specified minimum time.  
Reducing contact arcing  
Surge suppressors  
• Without LED (also for Cage Clamp terminals)  
Sizes S00, S0, S2, S3, S6 to S12  
• With LED (also for Cage Clamp terminals)  
Size S00  
The connection between the main conducting path and the EMC  
interference suppression module enables contact arcing, which  
is responsible for contact erosion and the majority of clicking  
noises, to be reduced; this in turn is conducive to an electromag-  
netically compatible design.  
All 3RT1 contactors and 3RH1 contactor relays can be retrofitted  
with RC elements or varistors for damping opening surges in the  
coil. Diodes or diode assemblies (comprising noise suppression  
diodes and Zener diodes for rapid switch-off) can be used.  
Higher operational reliability  
Since the EMC interference suppression module achieves a  
significant reduction in radio-frequency components and the  
voltage level in three phases, the contact endurance is also  
improved considerably. This makes an important contribution  
towards enhancing the reliability and availability of the system as  
a whole.  
The surge suppressors are plugged onto the front of size S00  
contactors. Space is provided for them next to a snap-on  
auxiliary switch block.  
With all size S0 to S3 contactors, varistors, RC elements and  
diode assemblies can be plugged on directly at the coil  
terminals, either on the top or underneath.  
Dispensing with fine graduations  
There is no need for fine graduations within each performance  
class, as smaller motors inherently have a higher inductance, so  
that one solution for all fixed-speed drives up to 5.5 kW is  
adequate.  
The plug-in direction of the diodes and diode assemblies is  
determined by a coding device.  
Coupling relays are supplied either without overvoltage  
damping or with a varistor or diode connected as standard,  
according to the version.  
Two electrical variants are available:  
• The advantages of the RC circuit lie mainly in the reduction in  
the rate of rise and in its RF damping ability. The selected  
values ensure effective interference suppression over a wide  
range.  
Note:  
The OFF-delay times of the NO contacts and the ON-delay times  
of the NC contacts increase if the contactor coils are damped  
against voltage peaks (noise suppression diode 6 to 10 times;  
diode assemblies 2 to 6 times, varistor +2 to 5 ms).  
V
Electromagnetic interference suppression module, 3-phase  
for size S00 contactors  
930 V  
400 V  
500 ms  
t
• The varistor circuit can absorb a high energy level and can  
also be used for frequencies ranging from 10 to 400 Hz  
(closed-loop controlled drives). There is no limiting below the  
knee-point voltage, however.  
V
A so-called counter-e.m.f. (electromotive force) is produced  
when motors or various inductive loads are turned off. Voltage  
peaks of up to 4000 V may occur as a result, with a frequency  
spectrum from 1 kHz to 10 MHz and a rate of voltage variation  
from 0.1 to 20 V/ns.  
950 V  
400 V  
500 ms  
t
Siemens LV 1 · 2006  
3/108  
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