“amps”: this is the full load current specifi ed on the motor rating plate, i.e. the running current. Instantaneous starting currents will be
several times this fi gure and details can be supplied if needed for any application, e.g. when running off a generator.
Current: our single and three phase pumps run on A.C. (alternating current) while low voltage pumps run on D.C. (direct current)
Frequency: all our AC motors are designed for 50Hz operation, but some models have alternative frequencies available.
Motor enclosure ratings: motors are classifi ed according to the degree of enclosure protection. The designation used for the degree of
protection consists of the letters “IP” followed by two characteristic numerals.
The fi rst characteristic numeral (0 – 6) designates the degree of protection of persons against contact with live or moving parts inside the
enclosure and protection of machines against ingress of solid foreign bodies.
The second numeral (0 – 8) designates the degrees of protection of machines against harmful ingress of liquids.
Details for motors use on our pumps are:-
IP23 2 Protection against solid bodies greater than 12mm.
3 Protection against spraying water up to 60° from the vertical.
IP44 4 Protection against solid bodies greater than 1mm.
4 Protection against splashing water, any direction.
IP54 5 Protection against dust.
4 Protection against splashing water, any direction.
IP55 5 Protection against dust.
5 Protection against water jets, any direction.
IP68 6 Complete protection against ingress of dust.
8 Submersible machine.
Motor cooling:
TEFV Totally enclosed, fan-ventilated
TESV Totally enclosed, self-ventilated.
Explosion proof motors: ATEX
Many industrial processes utilising fl ammable materials have the potential to give rise to a potentially explosive atmospheres. Potentially
explosive atmospheres exist where there is a risk of explosion due to mixtures of gas and air, vapour and air, dust and air or other fl ammable
combinations. Where a potentially explosive atmosphere is present, in order to protect personnel and plant, measures must be taken to
ensure that the electrical equipment cannot ignite that potentially explosive environment. It is therefore necessary to eliminate all sources of
ignition which might ignite such mixtures. These sources include, for example, electrical arcs and sparks, fl ames and hot surfaces, static
electricity and mechanical impact and friction. To ensure compliance, equipment, such as pumps, must meet the essential requirements
as specifi ed in the ATEX Directive 94/9/EC and be marked with the CE marking for EU use. Information in this catalogue that describes the
explosion proof pumps, carry a classifi cation e.g. Eexd-IIB-T3- II-2-G. The key is as follows (and this pump’s classifi cation):
Eexd – type of protection (explosion proof enclosure)
B – gas group (ethylene)
T3 – maximum surface temperature (200° C)
II – group (surface)
2 – level of protection for zone (high level of protection for zone 1)
G – type of hazardous atmospheres (gases, vapours, mists)
“duty”:
Pumps: most of our A.C. pumps, have continuously rated motors. If you intend to run a pump continuously, please
check with our Sales Department to check it’s suitability. Motors on some of our D.C. pumps are shown as continuously
rated, while others have an intermittent rating that requires a period of rest, after running, for cooling purposes.
N.B. – Even if continuously rated, all our D.C. motors have a fi nite brush life.
Panels: the number of pumps that can be operated from the panel and at what voltage.
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