Ip Protection - Simrad AP35 Instruction Manual

3.16 IP protection

Each part of a Simrad autopilot system has got a two digits IP protection
code.
The IP rating is a method to classify the degree of protection against solid
objects, water ingress and impact afforded by electrical equipment and
enclosures. The system is recognised in most European countries and is set
out in a number of British and European standards.
The first code number describes the protection against solid objects, and the
second number describes the protection against liquids.
IP
0
1
2
3
4
5
6
22083083H
FIRST NUMBER
Protection against solid objects
TESTS
No protection
Protection against solid objects
up to 50 mm, eg. accidental
touch by hands.
Protection against solid objects
up to 12 mm, eg. fingers.
Protection against solid objects
over 2.5 mm (tools + wires)
Protection against solid objects
over 1 mm (tools + wires +
small wires)
Protection against dust -
limited ingress (no harmful
deposit)
Totally protected against dust
Technical Specifications
SECOND NUMBER
Protection against liquids
IP TESTS
0 No protection
1 Protected against vertically
falling drops of water (eg.
condensation).
2 Protected against direct sprays
of water up to 15° from the
vertical.
3 Protected against sprays to 60°
from the vertical.
4 Protected against water
sprayed from any direction -
limited ingress permitted.
5 Protected against low pressure
jets of water from all
directions - limited ingress
permitted.
6 Protected against strong jets of
water, eg. for use on shipdecks
- limited ingress permitted.
7 Protected against the effects of
immersion between 15 cm and
1 m.
8 Protected against long periods
of immersion under pressure.
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