產(chǎn)品內(nèi)容介紹
ECOLAB 3410T 3410-302412001100X顯示控制觸摸屏
峰值電流能力電磁閥、接觸器和氣動模塊通常有一個穩(wěn)態(tài)線圈和一個拾取線圈。拾取線圈的浪涌電流需求比穩(wěn)態(tài)電流高幾倍，通常超過標(biāo)稱輸出電流（包括功率升壓）。啟動電容負(fù)載時，同樣的情況也適用。分支電路通常用斷路器或保險絲進(jìn)行保護(hù)。在分支電路短路或過載的情況下，保險絲需要一定量的過電流才能跳閘或熔斷。峰值電流能力可確保后續(xù)斷路器的安全操作。假設(shè)輸入電壓在此類事件之前開啟，電源內(nèi)內(nèi)置的大尺寸輸出電容器可以提供額外電流。對電容器放電會導(dǎo)致輸出電壓下降。以下兩個示例顯示了典型的電壓驟降：諸如減速電機和電感器之類的負(fù)載可以將電壓反饋給電源。該特性也稱為反電勢抗擾度或反電勢電阻。此電源具有電阻，當(dāng)負(fù)載將電壓反饋給電源時不會出現(xiàn)故障。不管電源是打開還是關(guān)閉。允許的最大反饋電壓為35Vdc。吸收能量可根據(jù)第8章中規(guī)定的內(nèi)置大尺寸輸出電容器進(jìn)行計算。
蓄電池充電
該電源可用于鉛酸或免維護(hù)24V VRLA電池的浮充。電池充電說明：a）根據(jù)預(yù)期電池溫度，非常精確地將斷開負(fù)載的輸出電壓設(shè)置為充電結(jié)束電壓。b） 在電源和蓄電池之間使用15A或16A斷路器（或阻塞二極管）。c） 確保電源的輸出電流低于蓄電池的允許充電電流。d） 將12V類型串聯(lián)時，只能使用匹配的電池。e） 電源的回流電流為典型值。電源關(guān)閉時，25Vdc時為3mA（除非使用阻塞二極管）。標(biāo)準(zhǔn)微型斷路器（MCB）可用于分支保護(hù)。確保MCB也具有直流電壓額定值。以下測試顯示了電源通常跳閘的斷路器。斷路器的跳閘行為有很大的公差。因此，這些典型測試只能用作建議或用于比較兩個不同的電源。此外，回路阻抗對斷路器是否跳閘有重要影響。進(jìn)行了兩項測試，代表典型情況：測試1：電纜電源端與S1短路（回路阻抗約20mOhm）必須使用哪個線規(guī)來跳閘額定值為6A的B特性斷路器？負(fù)載線長度為21m。答：6A B特性斷路器要求回路阻抗小于180mOhm（測試結(jié)果）。電線長度表顯示，橫截面為2.5mm2的25.1m以下的電線低于180mOhm。應(yīng)使用不小于2.5mm2的電線。
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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