电压自动切换装置在电能计量装置改造中的应用

电能计量二次回路在运行中会发生二次保险熔断，回路接触不良等诸多问题，造成电压互感器故障，计量二次回路失压等，影响了电费核算和部分经济指标的完成。在计量二次回路中加装计量电压自动切换装置可解决上述问题。从电压自动切换装置的工作原理进行分析，提出应用电压自动切换装置改造电能计量装置计量二次回路的方案，以及改造工作中需要注意的几个问题。

Application of Voltage Automatic Switching Device in Energy Metering Device Retrofitting

The problems such as secondary wire fusing, improper circuit contact are existed in the operation of energy metering secondary circuit. These problems will result in the fault of voltage transformer and voltage losses of metering secondary circuit, and affect the accomplishment of tariff accounting and partial economic index. Adding energy metering device in metering secondary circuit can solve the above-mentioned problems. This paper analyzes the principle of energy metering device, put forward relative retrofitting scheme, and the problem to be paid attention in the retrofitting.