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and of water. The IP code is a coding system to indicate the protection
index.
Applicational scope
It applies to enclosures for electrical equipment with a rated voltage of
less than or equal to 72.5 kV. It does not concern the circuit breaker on its
own but the front panel must be adapted when the latter is installed within
a cubicle (e.g. finer ventilation grills).
The various IP codes and their meaning
A brief description of items in the IP code is given in the table on the
following page.
Schneider Electric
Gamme AMTED300014EN_038_04
Design rules
0Protection index
Item Figures Meaning for protection Representation
or letters of equipment of people
Code letter IP
first characteristic against penetration against access to
figure of solid foreign bodies hazardous parts with
0 (not protected) (not protected)
1 diameter e" 50 mm back of the hand
2 diameter e" 12,5 mm finger
3 diameter e" 2,5 mm tool
4 diameter e" 1 mm wire
5 protected against dust wire
6 sealed against dust wire
second characteristic against penetration of water
figure with detrimental effects
0 (not protected)
1 vertical water drops
2 water drops (15° inclination) 15
3rain
60
4 water projection
5 spray projection
6 high power spray projection
7 temporary immersion
8 prolonged immersion
additional letter (optional) against access to hazardous parts with:
A back of the hand
B finger
Ctool
D wire
additional letter (optional) additional information specific to:
H high voltage equipment
M movement during the water testing
S stationary during the water testing
W bad weather
Schneider Electric
TED300014EN_038_044. Gamme
Design rules
0Protection Index
IK code
Introduction
# Certain countries felt the need also to code the protection provided by
enclosures against mechanical impact.
To do this they added a third characteristic figure to the IP code (the case
in Belgium, Spain, France and Portugal). But since the adoption of
IEC 60 529 as the European standard, no European country can have
a different IP code.
# Since the IEC has up to now refused to add this third figure to the
IP code, the only solution to maintain a classification in this field was to
create a different code. This is a subject of a draft European standard
EN 50102: code IK.
# Since the third figure in various countries could have different
meanings and we had to introduce additional levels to cover the main
requirements of product standards, the IK indices have a different
meaning to those of the previous third figures (cf. table below).
Previous 3rd figures of the IK code
IP code in NF C 20-010 (1986)
IP XX1 IK 02
IP XX3 IK 04
IP XX5 IK 07
IP XX7 IK 08
IP XX9 IK 10
NB: to limit confusion, each new index is given by a two figure number.
Definitions
# The protection indices correspond to impact energy levels expressed
in joules
5 hammer blow applied directly to the equipment
5 impact transmitted by the supports, expressed in terms of vibrations
therefore in terms of frequency and acceleration
# The protection indices against mechanical impact can be checked by
different types of hammer: pendulum hammer, spring-loaded hammer or
vertical free-fall hammer (diagram below).
striker
latching mechanism
pedulum pivot
relief cone arming button
support
hall height
attaching
support
specimen
Schneider Electric
Gamme AMTED300014EN_038_04
Design rules
0Protection index
The various IK codes and their meaning
IK code IK 01 IK 02 IK 03 IK 04 IK 05 IK 06 IK 07 IK 08 IK 09 IK 10
energies in joules 0.15 0.2 0.35 0.5 0.7 1 2 5 10 20
radius mm 1 10 10 10 10 10 10 25 25 50 50
material 1 P P P P P P A A A A
steel = A 2
polyamide = P 3
hammer
pendulum ' ' ' ' ' ' ' ' ' '
spring loaded 4 ' ' ' ' ' '
vertical ' ' ' '
' = yes
N.B.:
1
of the hammer head
2
Fe 490-2 according to ISO 1052, hardness 50 HR to 58 HR according to ISO 6508
3
hardness HR 100 according to ISO 2039-2
Schneider Electric
TED300014EN_038_044. Gamme
Switchgear
0Medium voltage circuit breaker
definition
Introduction
IEC 60 056 and ANSI C37-06
# The circuit breaker is a device that ensures the control and protection
define on one hand the operating conditions,
on a network. It is capable of making, withstanding and interrupting
the rated characteristics, the design and
operating currents as well as short-circuit currents.
the manufacture; and on the other hand
the testing, the selection of controls
# The main circuit must be able to withstand without damage:
and installation.
5 the thermal current = short-circuit current during 1 or 3 s
5 the electrodynamic current:
2.5 " Isc for 50 Hz (IEC)
2.6 " Isc for 60 Hz (IEC)
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