5) AG2
– mean mechanical strain; in normal industrial operations
6) AH2
– mean vibrations; in normal industrial operations
7) AK2
– serious risk of plant and moulds growth
8) AL2
– serious risk of occurrence of animals
(insects,birds,smallanimals)
9) AM-2-2 – normal level of signal voltage. No additional requirements.
10) AN2
– mean solar radiation. Intensity > 500 and ≤ 700 W / m
2
11) AP3
– mean seismic impacts; acceleration > 300 Gal ≤ 600 Gal
12) BA4
– capability of persons; instructed persons
13) BC3
– frequent contact of persons with ground potential; persons often touch foreign conductive parts or stand on
conductive substrate
Operating position
The actuators can be operated in any operating position.
3. WORKING REGIME, SERVICE LIFE OF ACTUATORS
The actuators can be operated with the type of loading S2 according to ČSN EN 60 034-1. The run period at
tempe50 °C is 10 minutes; the mean value of loading torque should not exceed 60 % of the value of maximum
tripping torque Mv.
The actuators can also work in the regime S4 (interrupted run with start-up) according to ČSN EN 60 034-1. Load
factor N/N+R is max. 25 %; the longest working cycle (N+R) is 10 minutes (course of working cycle is shown in the
figure). The highest number of closing operations in automatic regulation is 1200 cycles per hour. Mean value of
loading torque with load factor 25 % and surrounding tempe50 °C is not higher than 40 % of maximum
tripping torque Mv.
The highest mean value of loading torque is equal to rated torque of the actuator.
4
Corrosion
aggressiveness
level
Example of typical environment
Outdoor
Indoor
C1
Heated buildings with clean atmosphere
(very low)
e.g. offices, shops, schools, hotels.
C2
Atmosphere with low level of pollution.
Unheated buildings, in which may occur
(low)
Mostly outdoor areas.
condensation, e.g. stocks, sports halls.
C3
Urban industrial atmospheres,
Production areas with high humidity and low air
(middle)
mild pollution of sulfur dioxide.
pollution, e.g. food industry, processing
Seaside areas with middle salinity.
factories, breweries.
C4
Industrial areas and seaside areas
Chemical plants, swimming pools,
(high)
with middle salinity.
seaside shipyard.
C5-I
(very high
Industrial areas with high humidity
Buildings or areas with predominantly continuous
– industrial)
and aggressive atmosphere.
condensation and high air pollution.
C5-M
(very high
Seaside areas with high salinity.
Buildings or areas with predominantly
– seaside)
continuous condensation and high air pollution.
Corrosion protection
Actuators are standardly delivered with surface treatment corresponding to category of corrosion aggressiveness C1,
C2 and C3 according to ČSN EN ISO 12944-2.
On customer's request is possible to do surface treatment correcponding to category of corrosion aggressiveness C4,
C5-I and C5-M.
In following table is provided and overview of environment for each categories of corrosion aggressiveness
according to ČSN EN ISO 12944-2.
