用heavy 或者 large 都可以
heavy 常用些：
如：
1.Controlled under the heavy-current, it is easier to operate and adjust.
全部采用強電控制,操作簡便,易于調(diào)整.
2.When a high-power electric motor is starting, the current is heavy and the traditional protection strategy can't distinguish if it is a short-circuit current or the normal starting current, so the system is tend to make wrong.
大功率電動機啟動時電流較大,傳統(tǒng)的保護策略無法區(qū)分是短路電流還是正常啟動電流,易產(chǎn)生誤動.