Climate Class I

All ABEBA ESD shoes are certified in keeping with EN61340-4-3, climate class 1.
The climate classes generally stand for the electrostatic behaviour of the shoes.

The classification is based on electrical measurements performed under precisely defined conditions
that we have listed for you in the table below.

Climate classPre-treatmentConditioning Measurement


1 96 (+10) h
(40 +/- 3) °C
RH < 15 %
96 (+10) h
(23 +/- 2) ° C
(12 +/- 3) % RH
(23 +/- 2) °C
(12 +/- 3) % RH
2 2 96 (+10) h
(23 +/- 2) °C
(25 +/- 3) % RH
(23 +/- 2) °C
(25 +/- 3) % RH
3 3 48 (+ 5) h
(23 +/- 2) °C
(50 +/- 5) % RH
(23 +/- 2) °C
(50 +/- 5) % RH

h = duration in hours, °C = temperature, % RH = relative humidity

The differences between the various climate classes 1, 2 and 3 are mainly based

on the relative air humidity of the test environment, with the air humidity affecting

the tested shoes‘ electrostatic discharge behaviour.

This is why shoes are tested in an environment with 50 % air humidity to establish

their suitability for climate calls 3, and at an air humidity of 25 % for climate class 2.

Inclusion in climate class 1 is achieved by successfully passing the test at 12% air humidity.

All the tests are meanwhile applied at a temperature of 23°C.

As a general rule, the higher the air humidity is in the environment, the greater will the

shoes‘ discharge capacity be. Accordingly, a shoe certified as climate class 1 is best suited

for discharging electrostatic charges to the earth ground potential. These shoes even

possess the discharge capacity required to avoid electrostatic discharges in very low air

humidity and with dry materials. All the other environmental factors capable of affecting

electrostatic discharges, such as an insulating floor or insulating deposits on the outer soles

of the shoes, should also be taken into account, however.

Climate class 1-certified shoes are not only urgently recommended in the environs of the

chemical and electrical industries and handling of flammable liquids and gases, paints and

varnishes, but also in classic areas with intensive dust pollution such as printing plants,

mills, granaries or the wood-processing industries. Especially as these ESD shoes will help to

minimize the risk of ignition by electrostatic discharge.

Technical rules for operational safety (TRBS 2153)
TRBS 2153 section 7.1 requires conductive shoes with a contact resistance under 100 megohm

to be worn in areas at risk from explosions. Our shoes meet this requirement as per EN 61340-4-3

(test with metal balls in the shoe on a metal plate) and EN 61340-5-1 (test with person in the shoe

on a metal plate).