西门子3RW4 027-1BB14

正常起动应用实例（10 级）
CLASS 10 标准起动 （长 20 s，300% In motor ，每小时一次起动）
所选择的软起动器额定值可以高达所用电机的额定值
应用举例
传送带
辊式输送机
压缩器功能
小型风机1)
泵
液压泵
起动参数
•电压斜坡和电流限制
•启动电压
1) 风机的质量惯量小于电机质量惯量的 10 倍。
注：
这些表提供了示例设定值和设备尺寸。这些值仅供参考，没有实际约束力。设定值取决于有关的应用程序，必须在调试期间进行优化。
需要时，应通过技术支持部门的帮助来检查软起动器的尺寸。
组态
3RW 固态电机控制器设计用于简便启动条件中。在异常条件或增大开关频率的情况下，可能有必要选择一个较大的设备。
如果起动时间较长，必要时必须选用用于较重起动负载的过载继电器。推荐使用 PTC 传感器
不允许在电机馈电线内 SIRIUS 3RW 软起动器和电机之间使用电容性元件（如，不能使用无功补偿设备）。此外，无论是用于无功补偿的静态系统，还是动态 PFC（功率因数校正），在启动时和软起动器斜降时都不能并行操作。这对于防止补偿设备和/或软起动器发生故障来说十分重要。
主电路的所有元件（比如熔断器，开关设备和过载继电器）应该按照在加载短路时直接起动的情况下相应的进行选型。熔断器，开关设备和过载继电器必须单独订购。请遵守在技术数据中*的开关频率。
注：
在接通感应电机时，所有类型的起动器上（直接起动器、星-三角起动器、软起动器）通常都会产生电压降。馈电变压器的尺寸必须能达到这样的效果：启动电机时，所发生的电压降不能**出允许公差的范围。如果馈电变压器确定尺寸时边沿较小，则从一个独立电路（都不依赖于主电压）将控制电压馈入，以便防止可能发生将软起动器切断的情形。
功率电子电路的示意电路图
旁通接触系统集成在 3RW30 软起动器中，因此*单独订货。
状态图
SIRIUS 3RW30 软起动器

Operational classes
Fuses are categorized according to function and operational classes. SITOR semiconductor fuses, in LV HRC design, are available in the following operational classes:
•aR: for the short-circuit protection of power semiconductors (partial range protection)
•gR: for the protection of power semiconductors (full range protection)
•gS: The gS operational class combines cable and line protection with semiconductor protection (full range protection).

SILIZED Design
•SILIZED semiconductor fuses have an extremely compact design. This means they have a very small footprint – particularly the NEOZED version
•The rugged and well-known DIAZED design complies with IEC 60269-3. It is globally renowned and can be used in many countries
•A huge range of fuse bases and accessories are available for the NEOZED and DIAZED versions of the SILIZED semiconductor fuses. This increases the application options in many devices.
Cylindrical Fuse Design
•Cylindrical fuses have an extremely compact design and a correspondingly small footprint
•The cylindrical fuses have IEC and UL approval and are suitable for universal use worldwide
•The use of SITOR cylindrical fuses in the cylindrical fuse holders and bases has been tested with regard to heat dissipation and maximum current loading. This makes planning and dimensioning easier and prevents consequential damage
•The use of fuse holders as switch disconnectors expands the area of application of these devices and increases operating safety.

优势
LV HRC Design
•SITOR semiconductor fuses have a high varying load factor, which ensures a high level of operating safety and plant availability – even when subject to constant load change
•The use of SITOR semiconductor fuses in LV HRC bases or Siemens switch disconnectors has been tested with regard to heat dissipation and maximum current loading. This makes planning and dimensioning easier and prevents consequential damage
•Our high standard of quality ensures good compliance with the characteristic curve and accuracy. This ensures long-term protection of devices.