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“ATmosphères EXplosible”
– 94/9/EC/ATEX Directive
The new Atex directive covers equipment (with
its own source of ignition) and protective systems intended for
use in a potentially Explosives Atmosphere.
The directive which became mandatory on 1st July
2003 covers all flameproof electric motors purchased and commissioned
within the EU.
The directive classifies equipment into different
categories, levels of protection, and areas/zones of use, according
to the frequency and length of time in which an explosive atmosphere
could occur.
Flameproof motors are divided into two groups :
- GROUP I - For mines susceptible to firedamp (Methane)
- GROUP II – For other explosive atmospheres (i.e. above
ground)
APPARATUS GROUPS AND CATEGORIES
Source : Cemp International SpA
GROUP II – is divided into three further
categories for EEx-d, namely GAS GROUPS IIA, IIB & IIC, with
IIC having the highest protection.
Motors in a gas environment are further divided
into 6 temperature classes categorised by the maximum surface temperature
under normal running conditions.
TEMPERATURE CLASSES FOR GAS
Source : Cemp International SpA
TEMPERATURE CLASSES FOR DUST
For protection against conductive dust the ignition
temperature of the dust involved, both as air borne and surface
dust, must be calculated, to work out a lower value surface temperature
required from the motor.
CHOICE OF SAFETY MOTORS
Source : Cemp International SpA
Cemp Internationals range of flameproof motors is
manufactured in such a way that there is no risk of explosion.
In compliance with the directive all apparatus must be labelled
with the CE mark, and supplied with a CE declaration of Conformity
and Safety Manual.
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| “Industrial electric motors consume
over 60% of all electrical energy used within Industry” |
The climate change levy, introduced in 2001 to
reduce the emissions of greenhouse gases in the UK, imposed a tax
on energy consumed by industry, and brought in ‘Enhanced Capital
Allowance’ to encourage businesses to invest in energy efficient
machinery.
The enhanced capital allowance scheme provides
100% tax relief on the capital cost of the asset which can be claimed
back by companies in the charge to income / corporation tax, within
the first year of operation.
The initial extra cost of a high efficiency motor,
arising from the use of more of the highest quality materials, is
also offset during the lifetime of the motor due to reduced operation
costs.
To be eligible the motor manufacturer must be registered
on the ‘UK Energy Technology list’ that can be found
on www.eca.gov.uk.
AEG’s AMHE range is fully compliant with
the efficiency 1 class as set out in the CEMEP agreement, requiring
the motors to have a higher efficiency value than that of standard
motors and to show the eff 1 logo on the nameplate.
The range of motors covered by the agreement is
as below ;
- TEFC squirrel cage Induction motors
- 1.1Kw – 90Kw
- 2 & 4 Pole
- 400V/3/50Hz supply
- S1 Duty
- Standard design
For further information visit www.eca.gov.uk
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