配电架空线路上除了断路器、分段开关、隔离开关和跌落式熔断器等开关电气器外，还有避雷器等保护设备。偶尔还会碰到高压电能计量装置。
In addition to the breaker, section switch, disconnector and drop fuse, there are also lightning arrester and other protection equipment on the distribution overhead line. Occasionally, high-voltage electric energy metering device will be encountered.
电能计量装置安装在用户电力变压器的高压侧，即由高压供电到用户，采用"高供高计" 的电能计量方式。这种计量方式的特点能将电力变压器的损耗计量在内，有利于鼓励专变供电用户提高功率因数。
The electric energy metering device is installed on the high-voltage side of the user's power transformer, that is, from the high-voltage power supply to the user, adopting the electric energy metering mode of "high power supply high meter". The characteristics of this metering method can include the loss of power transformer, which is helpful to encourage the users of special transformer to improve the power factor.
通常情况下，计量设备安装在户内，但也有部分安装在架空线路上，如图1 所示，高压计量装置安装在配电变压器的电源侧。
Generally, the metering equipment is installed indoors, but some of them are installed on overhead lines. As shown in Figure 1, the high-voltage metering device is installed on the power side of the distribution transformer.
在不同配电网供电区域之间的联结点，为便于电能管理，也会在架空线路上安装高压计量装置。
For the convenience of power management, high-voltage metering devices will also be installed on overhead lines at the connection points between different distribution network power supply areas.