请问电流大的大用英文怎么说？？

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.
全部采用强电控制，操作简便，易于调整。

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.
大功率电动机启动时电流较大，传统的保护策略无法区分是短路电流还是正常启动电流，易产生误动。

大电流 : heavy current | big current

heavy

heavy, strong

large.
你可以去google搜一下，输入 large current，会出来很多。
我不是告诉你是large了吗？
large load current，大负载电流。
我是学光学工程的，相信我，没问题的