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ECOLAB 3410T 3410-302412001100X显示控制触摸屏
峰值电流能力电磁阀、接触器和气动模块通常有一个稳态线圈和一个拾取线圈。拾取线圈的浪涌电流需求比稳态电流高几倍，通常超过标称输出电流（包括功率升压）。启动电容负载时，同样的情况也适用。分支电路通常用断路器或保险丝进行保护。在分支电路短路或过载的情况下，保险丝需要一定量的过电流才能跳闸或熔断。峰值电流能力可确保后续断路器的安全操作。假设输入电压在此类事件之前开启，电源内内置的大尺寸输出电容器可以提供额外电流。对电容器放电会导致输出电压下降。以下两个示例显示了典型的电压骤降：诸如减速电机和电感器之类的负载可以将电压反馈给电源。该特性也称为反电势抗扰度或反电势电阻。此电源具有电阻，当负载将电压反馈给电源时不会出现故障。不管电源是打开还是关闭。允许的最大反馈电压为35Vdc。吸收能量可根据第8章中规定的内置大尺寸输出电容器进行计算。
蓄电池充电
该电源可用于铅酸或免维护24V VRLA电池的浮充。电池充电说明：a）根据预期电池温度，非常精确地将断开负载的输出电压设置为充电结束电压。b） 在电源和蓄电池之间使用15A或16A断路器（或阻塞二极管）。c） 确保电源的输出电流低于蓄电池的允许充电电流。d） 将12V类型串联时，只能使用匹配的电池。e） 电源的回流电流为典型值。电源关闭时，25Vdc时为3mA（除非使用阻塞二极管）。标准微型断路器（MCB）可用于分支保护。确保MCB也具有直流电压额定值。以下测试显示了电源通常跳闸的断路器。断路器的跳闸行为有很大的公差。因此，这些典型测试只能用作建议或用于比较两个不同的电源。此外，回路阻抗对断路器是否跳闸有重要影响。进行了两项测试，代表典型情况：测试1：电缆电源端与S1短路（回路阻抗约20mOhm）必须使用哪个线规来跳闸额定值为6A的B特性断路器？负载线长度为21m。答：6A B特性断路器要求回路阻抗小于180mOhm（测试结果）。电线长度表显示，横截面为2.5mm2的25.1m以下的电线低于180mOhm。应使用不小于2.5mm2的电线。
PEAK CURRENT CAPABILITY
Solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. The inrush current demand of the pick-up coil is several times higher than the steady state current and usually exceeds the nominal output current (including the Power Boost) The same situation applies, when starting a capacitive load. Branch circuits are often protected with circuit breakers or fuses. In case of a short or an overload in the branch circuit, the fuse needs a certain amount of over-current to trip or to blow. The peak current capability ensures the safe operation of subsequent circuit breakers. Assuming the input voltage is turned on before such an event, the built-in large sized output capacitors inside the power supply can deliver extra current. Discharging this capacitor causes a voltage dip on the output. The following two examples show typical voltage dips:Loads such as decelerating motors and inductors can feed voltage back to the power supply. This feature is also called return voltage immunity or resistance against Back- E.M.F. (Electro Magnetic Force). This power supply is resistant and does not show malfunctioning when a load feeds back voltage to the power supply. It does not matter whether the power supply is on or off. The maximum allowed feed back voltage is 35Vdc. The absorbing energy can be calculated according to the built-in large sized output capacitor which is specified in chapter 8.
CHARGING OF BATTERIES
The power supply can be used for float-charging of lead-acid or maintenance free 24V VRLA batteries. Instructions for charging batteries: a) Set the output voltage, at disconnected load, very precisely to the end-of-charge voltage according to the expected battery temperature.b) Use a 15A or16A circuit breaker (or blocking diode ) between the power supply and the battery. c) Ensure that the output current of the power supply is below the allowed charging current of the battery. d) Use only matched batteries when putting 12V types in series. e) The return current to the power supply is typ. 3mA at 25Vdc when the power supply is switched off (except in case a blocking diode is utilized).Standard miniature circuit breakers (MCBs) can be used for branch protection. Ensure that the MCB is rated for DC voltage, too. The following tests show which circuit breakers the power supply typically trips. Circuit breakers have huge tolerances in their tripping behavior. Therefore, these typical tests can only be used as a recommendation or for comparing two different power supplies. Furthermore, the loop impedance has a major influence on whether a breaker trips or not. Two tests were performed, representing typical situations: Test 1: Short circuit with S1 on the power supply end of the cable (loop impedance approx. 20mOhm)Which wire gauge must be used to trip a B-Characteristic circuit breaker with a rating of 6A? The load wire length is 21m. Answer: A 6A B-Characteristic circuit breaker requires a loop impedance of less than 180mOhm (test results). The wire length table shows that up to 25.1m wire with a cross section of 2.5mm2 are below 180mOhm. A wire not smaller than 2.5mm2 shall be used.
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