Metering cubicle M is installed on the energy metering device on user's high-voltage side, equipped with current transformer and voltage transformer, and has the fuse of protecting voltage transformer, and anti-stealing electric energy measurement joint junction box.
|1min rated short-time power frequency withstand voltage (phase / fracture)||42/48kV||65/79kV|
|Rated lightning impulse withstand voltage (phase / fracture)||75/85kV||125/145kV|
|Rated short circuit withstand current||20kA||20kA|
|Rated short circuit withstand current duration||4s||4s|
|Rated peak withstand current||50kA||50kA|