新型计量二次接线盒的研究和应用

Research and Application of New Metering Secondary Junction Box

传统计量二次接线盒接线时,容易产生电流互感器二次开路、短路的故障;电能表与负控联合接线时遇到换表或换负控终端时都需短接电流,造成更换电能表和负控终端期间无法计量。为此,本文研究一种新型计量二次接线盒,改造接线盒的安装孔,改变传统的电能表与负控联合接线方式,同时改造传统接线盒短接连片为短接旋转螺杆以减少电流互感器二次开路、短路的现象。实践证明,该改进能够减少因错误接线带来的计量故障,减少更换电能表或负控终端时造成的电量损失。

When the traditional metering secondary wiring box is connected, it is easy to produce the fault of the secondary open circuit and short circuit of a current transformer. In the joint connection of the electric energy meter and negative control, the short-circuit current is required when the meter or negative control terminal is changed, which makes it impossible to measure during the replace-ment of the electric energy meter and negative control terminal. For this reason, this paper studies a new type of metering secondary junction box, transforms the installation hole of the junction box, changes the traditional joint connection mode of electric energy meter and negative control, and transforms the traditional junction box short connection piece into short connection rotating screw to reduce the phenomenon of secondary open circuit and short circuit of current transformer. Practice has proved that the improvement can reduce the measurement failure caused by the wrong wiring, and reduce the power loss caused by the replacement of the energy meter or the negative control terminal.