Protection against both direct and indirect contact
The idea application safety limits touch voltage can seen just the protection both
during normal service and case fault. There are many other
conditions, which shall fulfilled this type protection. Isolating transformer with one equipment. (For wet and very bad condition
the highest voltage must exceed the limits according Table 4.c.FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK 49
5.12
Protection electrical separation. 120 d.2.
.3. (According these conditions the
protection divided into three basic types:
SELV safety extra low voltage,
PELV protective extra low voltage,
FELV functional extra low voltage.
Figure 5.1). This type protection regarded being ensured
when the highest voltage cannot exceed a.4.c
