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10.4. Conditions from the EU type examination
certificate
Description of the motor cooling systems
Submersible motor pumps with submersible motor AM
....../...EX consisting of a hydraulic pump part coupled via
a common motor shaft to a 3-phase motor. The motor is
equipped with a permanently fixed power cable.
The submersible motor series AM ....../...EX are
cooled by means of the pumping medium and are suited for
continuous operation S1 with fully covered motor for
pumping raw waste water with slime and solids.
The submersible motor series AM ....../...LEX are cooled
by means of a closed cooling system and are thus suited
for continuous operation S1 with not-covered motor for
pumping raw waste water with slime and solids.
The submersible motor series AM ....../...UEX are
cooled by a by-pass part-flow of the pumping medium and
are thus suited for continuous operation S1 with not-co-
vered motor for pumping the raw waste water without
sedimenting slime or solids.
Determination
The operating instructions of the manufacturer must be
followed in order to ensure proper and safe operation of
the equipment. In addition, due care must be taken of the
local installation guidelines!
The submersible motors are equipped with temperature
limiters in the stator windings for direct motor control. The
level of the limiting temperature can be obtained from Ta-
ble 1 in the Appendix! The submersible motor pumps can
be optionally equipped with detector electrodes and inter-
nal level off-switches.
Caution! The AM303/AM376/AM421 and AM500 mo-
del sizes are generally equipped with the abovemen-
tioned monitoring systems. Both the detector elec-
trodes as well as the magnetic float switches are
tested as intrinsically ex-safe (Ex ib) „Simple electri-
cal equipment" according to EN 60079-11 Chap 5.4
and are to be taken into operation with the corres-
ponding connection measures as described below.
(test
report
IECEx
ExTR10.0039/01)
Environmental temperature -20°C to +40°C
Max. Pumping medium temperature +40°C
Caution! For submersible motors that are operated
using frequency regulation, the temperature classifi-
cation is T3! The frequency shown on the rating plate
must not be exceeded in the conversion operation.
All manuals and user guides at all-guides.com
Test
Report
No.Nl/KEM/
Installation information
Caution! The following measures will achieve a safe-
ty level of SIL2, as ignition monitoring measure for
prevention of the coming into effect of a potential
source of ignition, for normal operation of the equip-
ment for the equipment group II and Category II. (ap-
plies only for units with AM303; AM376; AM421 mo-
tors) THE OPERATOR OF THE PLANT must obtain for
the adherence to the ignition protection an own inde-
pendent installation consisting of a combination of
an electro-mechanical actuating system (level regu-
lation) in order to guarantee the required minimum
coverage of the pump hydraulics of at least 0.2 m.The
level safety system must verify a safety integrity level
SIL2!
Before first start-up of the equipment, the level re-
gulation is to be tested as a safety system SIL2 and
approved for function and accuracy according to
the setting parameters. The control of the plant is
to be arranged such that an automatic repeat swit-
ching-on lock after a switch-off of the equipment via
the level regulation, automatically sets the automatic
switching-on of the plant out of action. Only after
successful finding and repairing the error may the
plant be manually put into operation again.
The optical and acoustic warning messages of the
level regulation must be designed according to ergo-
nomic principles and provided unmistakable and cle-
ar information to the operator so that the necessary
measures for avoiding potential sources of ignition
can be initiated with a high degree of safety.
Caution! The function and effectiveness of the leveli-
ng adjustment must be monitored at regular interva-
ls. A complete inspection must be carried out at last
every 3 months!
The submersible motor series AM ....../...EX are cooled
by means of the pumping medium and are suited for con-
tinuous operation S1 with fully covered motor. The motor
part must be fully submerged in order to prevent the sur-
face temperature rising above the temperature classifica-
tion stated on the rating plate. However, with tight pump
shafts, a time of max 10 min can elapse until a level of 0.2
m over the pump part is emptied.
The submersible motor series AM ....../...UEX is cooled
by means of a by-pass part flow of the pumping medium.
Here, too, the pump part must be fully submerged in or-
der that the surface temperature does not rise above the
temperature classification stated on the rating plate. The
connection of free ends of the power cable may only be
carried out inside the potentially explosive areas by means
of suitable ex-tested and certified terminal boxes. No cer-
tified terminal boxes need be used outside of potentially
explosive areas.
EngliSH | 53
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