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Schumacher 1483-0400A输入流量控制器
外部输入保护该装置经过测试，可用于20A以下的分支电路。仅当供电支路的载流量大于此值时，才需要外部保护。在某些国家，当地法规可能适用。还应检查当地规范和当地要求。如果需要或使用外部保险丝，则需要最小值以避免保险丝意外跳闸。并联使用说明：单元A AC DC单元B AC DC-+-+负载+-A）仅使用同一系列（XLS）的电源。b） 将所有电源的输出电压调整至大致相同的值（±500mV）。否则，DC ok信号可能无法正常工作。c） 只有当三个以上的装置并联时，才需要在输出端安装保险丝（或二极管）。d） 不要给端子加载超过25A的电流。按照第27.9 e）节中的接线说明进行操作。两个电源之间保持15mm（左/右）的安装间隙，避免将电源安装在彼此的顶部。当电源安装在密封严密的外壳中时，外壳内部的温度将高于外部。内部温度定义电源的环境温度。这种安装的结果是：电源放在盒子的中间，盒子内没有其他热发生器
并行使用以实现冗余
电源可以并联以实现冗余，以获得更高的系统可用性。冗余系统需要一定数量的额外电源，以在一个电源设备发生故障时支持负载。最简单的方法是将两个XLS电源并联。这称为1+1冗余。如果一个电源装置发生故障，另一个电源可自动支持负载电流而不会中断。用于更高功率需求的冗余系统通常采用N+1方法构建。E、 g.五个电源并联，每个额定值为10A，以构建40A冗余系统。请注意：这种构建冗余系统的简单方法不包括诸如电源二次侧内部短路之类的故障。在这种几乎不可能的情况下，缺陷单元成为其他电源的负载，输出电压无法再维持。这只能通过使用解耦模块1606-XLSRED中包含的解耦二极管来避免。构建冗余电源系统的建议：a）为每个电源使用单独的输入保险丝。b） 监控各个电源设备。单元中已包含直流ok指示灯和直流ok触点。此功能报告单元故障。c） 如果可能，将每个电源连接到不同的相位或电路。d） 最好将所有电源的输出电压设置为相同的值，以避免错误的DC ok信号。27.9.只要通过一个端子引脚的最大电流不超过25A，就允许菊花链（从一个电源输出跳到下一个）。如果电流较高，请使用单独的配电接线板。
EXTERNAL INPUT PROTECTION
The unit is tested and approved for branch circuits up to 20A. External protection is only required if the supplying branch has an ampacity greater than this. In some countries local regulations might apply. Check also local codes and local requirements. If an external fuse is necessary or utilized, a minimum value is required to avoid undesired tripping of the fuse.Instructions for parallel use: Unit A AC DC Unit B AC DC - + - + Load + - a) Use only power supplies from the same series (XLS). b) Adjust the output voltages of all power supplies to approximately the same value (±500mV). Otherwise, the DC-ok signal might not work properly. c) A fuse (or diode) on the output is only required if more than three units are connected in parallel. d) Do not load terminals with more than 25A. Follow wiring instructions according to section 27.9 e) Keep an installation clearance of 15mm (left/right) between two power supplies and avoid installing the power supplies on top of each other.When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than outside. The inside temperature defines the ambient temperature for the power supply. Results from such an installation: Power supply is placed in the middle of the box, no other heat producer inside the box
PARALLEL USE FOR REDUNDANCY
Power supplies can be paralleled for redundancy to gain a higher system availability. Redundant systems require a certain amount of extra power to support the load in case one power supply unit fails. The simplest way is to put two XLS power supplies in parallel. This is called a 1+1 redundancy. In case one power supply unit fails, the other one is automatically able to support the load current without any interruption. Redundant systems for a higher power demand are usually built in a N+1 method. E.g. Five power supplies, each rated for 10A are paralleled to build a 40A redundant system. Please note: This simple way to build a redundant system does not cover failures such as an internal short circuit in the secondary side of the power supply. In such a - virtually nearly impossible - case, the defect unit becomes a load for the other power supplies and the output voltage can not be maintained any more. This can only be avoided by utilizing decoupling diodes which are included in the decoupling module 1606-XLSRED. Recommendations for building redundant power systems: a) Use separate input fuses for each power supply. b) Monitor the individual power supply units. A DC-ok lamp and a DC-ok contact is already included in the units This feature reports a faulty unit. c) When possible, connect each power supply to different phases or circuits. d) It is desirable to set the output voltages of all power supplies to the same value to avoid a false DC-ok signal. 27.9. DAISY CHAINING OF OUTPUTS Daisy chaining (jumping from one power supply output to the next) is allowed as long as the maximum current through one terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal block.
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