Siemens A1 A Environmental Protection Levels (IP rating)

International English Appendix A

A Environmental Protection Levels (IP rating)

Table A-1 gives the definitions of DIN40050, BS EN 60529 and IEC529. These refer to the IP numbers and the different levels of protection available.

	Table A-1	Protection levels (IP Rating)
FIRST NUMBER
0	No protection		No special protection of persons from direct contact with active or moving
			parts. No protection of the object from access of solid foreign matter.
1	Protection against large		Protection of persons from accidental large-area direct contact with active
	foreign bodies		or internal moving parts (e.g. hand contact), but no guard against
			intentional access to such parts. Protection of the object from access of
			solid foreign matter larger than 50mm in diameter.
2	Protection against		Protection of persons from finger contact with active or internal moving
	medium-size foreign		parts. Protection of the object from access of solid foreign matter larger
	bodies		than 12mm.
3	Protection against small		Protection of persons from touching active or internal moving parts with
	foreign bodies		tools, wires or similar foreign bodies thicker than 2,5mm. Protection of the
			object from access of solid foreign matter larger than 2,5mm.
4	Protection against very		Protection of persons from touching active or internal moving parts with
	small foreign bodies		tools, wires or similar foreign bodies thicker than l mm.
5	Limitation of ingress of		Total protection of persons from touching voltage-carrying or internal
	dust		moving parts Protection of the object from harmful deposit of dust.
			Although ingress is not completely prevented, dust will not enter in
			sufficient quantity to impair the operation or safety of the apparatus.
6	Prevention of ingress of		Total protection of persons from contacting voltage-carrying or internal
	dust		moving parts. Total protection of the object from ingress of dust.

MICROMASTER Applications Handbook 59