上海昊征自动化科技有限公司本着“以人为本、科技先导、顾客满意、持续改进”的工作方针，致力于工业自动化控制领域的产品开发、工程配套和系统集成，拥有丰富的自动化产品的应用和实践经验以及雄厚的技术力量，尤其以PLC复杂控制系统、传动技术应用、伺服控制系统、数控备品备件、人机界面及网络/软件应用为公司的技术特长。几年来，上海昊征自动化科技有限公司与德国SIEMENS公司自动化与驱动部门的长期紧密合作过程中，建立了良好的相互协作关系，在可编程控制器、交直流传动装置方面的业务逐年成倍增长，为广大用户提供了SIEMENS的新技术及自动控制的 解决方案。
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上海昊征自动化科技有限公司在经营活动中精益求精，具备如下业务优势：
1、模块化控制器SIMATIC S7系列（S7-1200、S7-1500、S7-200、S7-200CN 、S7-200 SMART、S7-300、S7-400）、分布式I/O-SIMATIC ET 200。
2、西门子HMI操作设备及SCADA系统：TP177B面板、OP177B面板、MP177操作面板 、OP277面板、MP377操作面板、KP300PN面板、KTP400PN面板、KP400PN彩色 面板、KTP600PN面板、KTP600DP面板、KTP1000PN面板、KTP1000DP面板、 TP1500PN面板
3、西门子变频器。
4、西门子SITOP电源。
5、西门子CNC系统和CNC控制器-SINUMERIK数控系统(SINUMERIK840D、SINUMERIK802S/C、SINUMERIK802SL、SINUMERIK828D SINUMERIK801D 、SINUMERIK828 、SINUMERIK808 、SINUMERIK840)。
6、伺服变频器数控V20/V90/V80V60。
7、西门子3RW软启动。
8、西门子停产备件。
9、仪表和传感器等各系列产品。
上海昊征自动化科技有限公司凭借雄厚的技术实力及多年从事 SIEMENS 产品的销售经验，本着树立公司形象和对用户认真负责的精神开展业务，赢得了SIEMENS 公司与广大用户的好评及大力支持。
【售后服务】：罚十，合同保证。
【产品质量】：质保保证，全新原装。
【产品价格】：价格优势，现货销售。
Line reactor
A line reactor is needed for high short-circuit power levels, partly to protect the actual converter against excessive harmonic currents, and thus against overload, and partly to limit line harmonics to the permitted values. The harmonic currents are limited by the total inductance comprising the line reactor and mains supply cable inductance. Line reactors can be omitted if the mains supply cable inductance is increased sufficiently, i.e., the value of RSC must be sufficiently small.
RSC = Relative Short-Circuit power: Ratio of short-circuit power Sk Line at the supply connection point to the fundamental apparent power Sconv of the connected converters (to IEC 60146‑1‑1).
PM330 Power Module requirements:
|
Power
|
Line reactor can be omitted
|
Line reactor required
|
|
kW (hp)
|
for RSC
|
for RSC
|
|
< 200 (< 268)
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≤ 43
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> 43
|
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200 ... 500 (268 ... 671)
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≤ 33
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> 33
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> 500 (> 671)
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≤ 20
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> 20
|
It is recommended that a line reactor is always connected on the line side of the converter, as in practice, it is often not known on which supply configuration individual converters are to be operated, i.e. which supply short-circuit power is present at the converter connection point.
A line reactor can only be dispensed with when the value for RSC is less than that in the above table. This is the case, when the converter, as shown in the following figure, is connected to the line through a transformer with the appropriate rating.
Notice:
A line reactor is always needed if a line filter is used.
In this case, the line short-circuit power Sk1 at the connection point of the converter is approximately:
Sk1 = Stransf/(uk transf + Stransf / Sk2 line)
Stransf = Transformer rated power
SK2 line = Short-circuit power of the higher-level voltage level
uk transf = Relative short-circuit voltage
