5SHX0660F0002 ABB 可控硅模块

5SHX0660F0002 ABB 可控硅模块主要参数

5SHX0660F0002额定通态平均电流在一定条件下，阳极—阴极间可以连续通过的50赫兹正弦半波电流的平均值。5SHX0660F0002正向阻断峰值电压在控制极开路未加触发信号，阳极正向电压还未超过导能电压时，可以重复加在可控硅两端的正向峰值电压。可控硅承受的正向电压峰值，不能超过手册给出的这个参数值。5SHX0660F0002反向阴断峰值电压当可控硅加反向电压，处于反向关断状态时，5SHX0660F0002可以重复加在可控硅两端的反向峰值电压。使用时，不能超过手册给出的这个参数值。 控制极触发电流在规定的环境温度下，阳极—阴极间加一定电压，使可控硅从关断状态转为导通状态所需要的小控制极电流和电压。维持电流在规定温度下，控制极断路，维持可控硅导通所必需的小阳极正向电流。

5SHX0660F0002

5SHX0660F0002采用可控硅技术对照明系统进行控制具有：电压调节速度快，精度高，可分时段实时调整，有稳压作用，采用电子元件，5SHX0660F0002相对来说体积小、重量轻 低。但该调压方式存在一致命缺陷，由于斩波，使电压无法实现正弦波输出，还会出现大量谐波，形成对电网系统谐波污染，危害 ，不能用在有电容补偿电路中。（现代照明设计要求规定，照明系统中功率因数必须达到0.9以上，而气体放电灯的功率因数在一般在0.5以下，所以都设计用电容补偿功率因数）在国外发达，已有明文规定对电气设备谐波含量的限制，在国内，北京、上海、广州等大城市，5SHX0660F0002已对谐波含量超标的设备限制并入电网使用。采用可控硅技术对照明系统进行照度控制时，可通过加装滤波设备来有效降低谐波污染。近年来，许多新可控硅元件相继问世，如适于高频应用的快速可控硅，可以用正或负的触发信号控制两个方向导通的双向可控硅，5SHX0660F0002可以用正触发信号使其导通，用负触发信号使其关断的可控硅等等。5SHX0660F0002可控硅调光器是目前舞台照明、环境照明领域的主流设备。5SHX0660F0002在照明系统中使用的各种调光器实质上就是一个交流调压器，老式的变压器和变阻器调光是采用调节电压或电流的幅度来实现的，如下图所示。u1是未经调压的220V交流电的波形，5SHX0660F0002经调压后的电压波形为u2，由于其幅度小于u1，使灯光变暗。在这种调光模式中，虽然改变了正弦交流电的幅值，5SHX0660F0002但并未改变其正弦波形的本质。

5SHX0660F0002

5SHX0660F0002 Main parameters of the ABB SCR module

5SHX0660F0002 Average current in rated on-state The average 50 Hz sinusoidal half-wave current that can be passed continuously between anode and cathode under certain conditions. 5SHX0660F0002 Forward blocking peak voltage When the control pole is open without a trigger signal and the anode forward voltage does not exceed the conductance voltage, the forward peak voltage at both ends of the thyristor can be repeated. The peak forward voltage of the thyristor cannot exceed the parameter value given in the manual. 5SHX0660F0002 Reverse negative peak voltage When the thyristor is in the reverse off state, 5SHX0660F0002 can repeat the reverse peak voltage at both ends of the thyristor. Do not exceed this parameter value given in the manual. At the specified ambient temperature, a certain voltage is added between the anode and cathode to make the thyristor change from the off state to the on-state required small control electrode current and voltage. Maintain current At the specified temperature, the control pole is broken, and the small anode forward current necessary to maintain the thyristor conduction is maintained. 5SHX0660F0002 The use of thyristor technology to control the lighting system has: voltage regulation speed, high accuracy, can be adjusted in real time, a voltage regulator, the use of electronic components, 5SHX0660F0002 is relatively small size, light weight low. However, the voltage regulation mode has a fatal defect, because of the chopper, so that the voltage can not realize the sine wave output, there will be a large number of harmonics, the formation of harmonic pollution to the power grid system, harm, can not be used in the capacitor compensation circuit. (Modern lighting design requirements stipulate that the power factor in the lighting system must reach more than 0.9, and the

5SHX0660F0002

power factor of the gas discharge lamp is generally below 0.5, so it is designed with capacitor compensation power factor) developed in foreign countries, there are clear regulations on the harmonic content of electrical equipment restrictions, in China, Beijing, Shanghai, Guangzhou and other big cities. 5SHX0660F0002 has restricted the use of equipment with excessive harmonic content into the power grid. When the thyristor technology is used to control the illumination of the lighting system, the harmonic pollution can be effectively reduced by installing filtering equipment. In recent years, many new thyristors have been introduced, such as fast thyristors for high-frequency applications, bidirectional thyristors that can be controlled with positive or negative trigger signals in both directions, 5SHX0660F0002 can be switched on with positive trigger signals, and thyristors that are turned off with negative trigger signals, and so on. 5SHX0660F0002 thyristor dimmer is the mainstream equipment in the field of stage lighting and environmental lighting. The various dimmers used in the lighting system are essentially an AC voltage regulator, and the dimming of old transformers and rheostat is achieved by adjusting the amplitude of voltage or current, as shown in the following figure. u1 is the unregulated 220V AC waveform, 5SHX0660F0002 voltage waveform after voltage regulation is u2, because its amplitude is less than u1, so that the light dim. In this dimming mode, although the amplitude of the sinusoidal alternating current is changed, 5SHX0660F0002 does not change the essence of its sinusoidal waveform.

5SHX0660F0002