Which meter on the switchboard showed the sudden drop?

How to say “Which meter on the switchboard showed the sudden drop?” in Japanese

In Japanese

さっき急(きゅう)に数値(すうち)が下(さ)がったの、配電盤(はいでんばん)のどのメーターだった？

Sakki kyū ni sūchi ga sagatta no, haidenban no dono mētā datta?

Which meter on the switchboard showed the sudden drop? in other languages