188v la mot khai niem lien quan den dien ap o muc 188 volt, duoc dung trong mot so he thong dien va thiet ke mach. Trong ngu canh cong nghe, 188v co the xem nhu mot muc dien ap tham chieu cho cac thiet bi tieu thu dien nang vua phai, hoac la mot tham nghiem duoc dung trong nghien cuu de mo ta dac tinh nang luong cua mot nguon.
O cap do co ban, dien ap la ap luc day electron trong mach. Khi noi ve 188v, ta xem no nhu mot nguong cho phep thiet bi hoat dong voi hieu suat toi uu va dong thoi dam bao an toan cho nguoi van hanh. Cac mach dung 188v can cac bien phap cach ly va kiem soat dien ap de tranh qua tai.
Trong cac he thong phan phoi dien, 188v co the duoc xem la mot muc dien ap thu nghiem doi voi thiet bi do luong, nguon cap cho mach logic, hoac lam tham chieu cho bien doi dien ap thong qua bo doi nguon. Viec chon muc dien ap phu hop giup toi uu hoa hieu suat va do ben cua cac thanh phan.
Viec lam viec voi dien ap cao doi hoi bien phap an toan nghiem ngat: cach ly, dung cu cach dien, bao ho, va tuan thu chuan an toan dien. Doi voi nguoi moi, hay bat dau voi mo hinh gia lap hoac nguon dien duoc cach ly de hoc cach do dac va kiem tra ma khong co rui ro.