188V la mot muc dien ap duoc su dung trong mot so he thong dien va thiet ke mach de xac dinh pham vi hoat dong cua thiet bi. Trong nganh cong nghiep, 188V co the dai dien cho muc ap cao trung binh de lam tham chieu cho cac thiet bi tai lon hoac lam tham chieu cho cac mach do luong.
Nguon goc cua muc dien ap nay co the den tu cac chuan dien ap cong nghiep hoac tu bo nguon bien doi. o muc 188V, nguoi van han can tuan thu cac quy trinh an toan, tranh cham vao day mang khi chua duoc cach ly va su dung thiet bi bao ho thich hop.
188V co the duoc dung cho cap nguon cho cac he thong dieu khien trung tam, cho cac mo hinh pin hoac he thong kich hoat, hoac lam tham chieu cho cac mach do luong. Trong thiet ke dien tu, muc dien ap nay giup toi uu hoa hieu suat ma van duy tri do an toan o muc tu nhien.
An toan khi lam viec voi 188V la bat buoc. Can phai cach ly nguon, kiem tra do chinh xac cua cac thiet bi do luong, dung cu bao ho, gang tay chong dien. De dam bao an toan tot, nguoi lao dong nen hieu ro quy trinh an toan, dung cac bien phap bao ve, va lam viec trong khu vuc day dien co che do cach ly.