KSB Amaprop GDSTP-24130-MAN-0004 P1 Installation instructions

Submersible Mixer
Amaprop®
Installation/Operating
Manual
Ident. number: 01070280
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GDSTP-24130-MAN-0004_P1

Legal information/Copyright
Installation/Operating Manual Amaprop®
Original operating manual
KSB Aktiengesellschaft Halle
All rights reserved. Contents provided herein must neither be distributed, copied, reproduced, edited
or processed for any other purpose, nor otherwise transmitted, published or made available to a third
party without KSB´s express written consent.
Subject to technical modification without prior notice.
© KSB Aktiengesellschaft Frankenthal 30.07.2010
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Contents
Glossary ................................................................................................ 5
1 General ................................................................................................ 6
1.1 Principles .......................................................................................................... 6
1.2 Installation of partly completed machinery .................................................. 6
1.3 Target group ................................................................................................... 6
1.4 Other applicable documents .......................................................................... 6
1.5 Symbols ............................................................................................................ 6
2 Safety ................................................................................................... 7
2.1 Key to safety symbols/markings ..................................................................... 7
2.2 General ............................................................................................................ 7
2.3 Intended use .................................................................................................... 7
2.4 Personnel qualification and training ............................................................. 8
2.5 Consequences and risks caused by non-compliance with these operating
instructions ...................................................................................................... 8
2.6 Safety awareness ............................................................................................. 8
2.7 Safety information for the operator/user ...................................................... 8
2.8 Safety information for maintenance, inspection and installation work ..... 9
2.9 Unauthorised modes of operation ................................................................. 9
2.10 Explosion protection ....................................................................................... 9
3 Transport/Temporary Storage/Disposal ........................................... 10
3.1 Transport ....................................................................................................... 10
3.2 Storage/Preservation ..................................................................................... 11
3.3 Return to supplier ......................................................................................... 11
3.4 Disposal .......................................................................................................... 11
4 Description ......................................................................................... 13
4.1 General description ....................................................................................... 13
4.2 Designation ................................................................................................... 13
4.3 Name plate .................................................................................................... 13
4.4 Design details ................................................................................................ 13
4.5 Configuration and function ......................................................................... 14
4.6 Scope of supply ............................................................................................. 15
4.7 Dimensions and weights ............................................................................... 15
5 Installation at Site ............................................................................. 16
5.1 Safety regulations ......................................................................................... 16
5.2 Checks to be carried out prior to installation ............................................. 16
5.3 Setting up the submersible mixer ................................................................ 18
5.4 Electrical connection ..................................................................................... 18
5.5 Checking the direction of rotation .............................................................. 23
Contents
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6 Commissioning/Start-up/Shutdown ................................................. 24
6.1 Commissioning/start-up ................................................................................ 24
6.2 Operating limits ............................................................................................ 24
6.3 Shutdown/storage/preservation ................................................................... 28
6.4 Returning to service ...................................................................................... 29
7 Servicing/Maintenance ...................................................................... 30
7.1 Safety regulations ......................................................................................... 30
7.2 Servicing/inspection ...................................................................................... 30
7.3 Drainage/disposal .......................................................................................... 37
7.4 Dismantling the submersible mixer ............................................................. 37
7.5 Reassembling the submersible mixer ........................................................... 39
7.6 Tightening torques ....................................................................................... 42
7.7 Spare parts stock ........................................................................................... 42
8 Trouble-shooting ............................................................................... 44
9 Related Documents ........................................................................... 45
9.1 General assembly drawing with list of components ................................... 45
9.2 Flamepaths on explosion-proof motors ....................................................... 48
9.3 Wiring diagrams ............................................................................................ 49
9.4 Forcing screws ............................................................................................... 51
9.5 General arrangement drawings ................................................................... 52
10 EC Declaration of Conformity .......................................................... 57
11 Certificate of Decontamination ....................................................... 58
Index .................................................................................................. 59
Contents
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Glossary
Certificate of decontamination
A certificate of decontamination certifies that
the submersible mixer has been properly
cleaned and decontaminated to eliminate any
environmental and health hazards arising from
components in contact with the fluid handled.
Fluid
In accordance with the intended use of the
submersible mixer, the term "fluid" (also
referred to as the fluid handled) refers to the
fluid the mixer is operated in, i.e. generally
municipal or industrial waste water and
sludges. The fluid is described in greater detail
by means of the gas and solids content, the
content and length of fibrous substances, its
chemical composition and temperature.
Submersible mixer
Submersible mixers are mixing units with open
axial propeller hydraulics and a dry submersible
motor.
Glossary
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1 General
1.1 Principles
This manual is supplied as an integral part of the type series and variants indicated
on the front cover. It describes the proper and safe use of this equipment in all
phases of operation.
The name plate indicates the type series and size, the main operating data, the order
number and the order item number. The order number and order item number
clearly identify the submersible mixer and serve as identification for all further
business processes.
In the event of damage, contact your nearest KSB service centre immediately to
maintain the right to claim under warranty.
1.2 Installation of partly completed machinery
To install partly completed machinery supplied by KSB, refer to the sub-sections
under Servicing/Maintenance.
1.3 Target group
This operating manual is aimed at the target group of trained and qualified specialist
technical personnel.
1.4 Other applicable documents
Table 1: Overview of other applicable documents
Document Contents
Data sheet Description of the technical data
General arrangement drawing/
outline drawing
Description of mating and installation dimensions
General assembly drawing1) Sectional drawing
Sub-supplier product literature1) Operating manuals and other product literature
of accessories and integrated machinery
components
Spare parts lists1) Description of spare parts
List of components1) Description of components
1.5 Symbols
Table 2: Symbols used in this manual
Symbol Description
✓Conditions which need to be fulfilled before proceeding with the
step-by-step instructions
⊳Safety instructions
⇨Result of an action
⇨Cross-references
1.
2.
Step-by-step instructions
Note
Recommendations and important information on how to handle
the product
1) If agreed to be included in the scope of supply
1 General
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2 Safety
All the information contained in this section refers to hazardous situations.
2.1 Key to safety symbols/markings
Table 3: Definition of safety symbols/markings
Symbol Description
!DANGER
DANGER
indicates a high-risk hazard which, if not avoided, will result in
death or serious injury.
!WARNING
WARNING
indicates a medium-risk hazard which, if not avoided, could result
in death or serious injury.
CAUTION
CAUTION
indicates a hazard which, if not avoided, could result in damage to
the machine and its functions.
Explosion protection symbol
identifies information about avoiding explosions in potentially
explosive atmospheres in accordance with EC Directive 94/9/EC
(ATEX).
General hazard symbol
in conjunction with one of the signal words indicates a hazard
which will or could result in death or serious injury.
Electrical hazard symbol
identifies information about protection against electrical voltage.
In conjunction with the signal word CAUTION, this symbol indicates
a hazard for the machine and its functions.
2.2 General
This manual contains general installation, operating and maintenance instructions
that must be observed to ensure safe operation of the submersible mixer and prevent
personal injury and damage to property.
The safety information in all sections of this manual must be complied with.
This manual must be read and completely understood by the responsible specialist
personnel/operators prior to installation and commissioning.
The contents of this manual must be available to the specialist personnel at the site
at all times.
Information attached directly to the submersible mixer must always be complied
with. This applies to, for example:
▪Arrow indicating the direction of rotation
▪Markings for connections
▪Name plate
The operator is responsible for ensuring compliance with all local regulations which
are not taken into account in this manual.
2.3 Intended use
The submersible mixer must only be operated within the operating limits described in
the other applicable documents.
▪Only operate submersible mixers which are in perfect technical condition.
▪Do not operate partially assembled submersible mixers.
!DANGER
2 Safety
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▪Only use the submersible mixer in the fluid described in the data sheet or
product literature.
▪Never operate the submersible mixer without fluid.
▪Observe the minimum fluid levels indicated in the data sheet or product
literature (to prevent overheating, bearing damage, cavitation damage, etc.).
▪Consult the manufacturer about any use or mode of operation not described in
the data sheet or product literature.
▪Never exceed the permissible operating limits (temperature, etc.) specified in the
data sheet or product literature.
▪Observe all safety information and instructions in this manual.
2.4 Personnel qualification and training
All personnel involved must be fully qualified to install, operate, maintain and
inspect the machinery this manual refers to.
The responsibilities, competence and supervision of all personnel involved in
installation, operation, maintenance and inspection must be clearly defined by the
operator.
Deficits in knowledge must be rectified by sufficiently trained specialist personnel
training and instructing the personnel who will carry out the respective tasks. If
required, the operator can commission the manufacturer/supplier to train the
personnel.
Training on the submersible mixer must always be supervised by technical specialist
personnel.
2.5 Consequences and risks caused by non-compliance with these operating
instructions
▪Non-compliance with these operating instructions will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
▪Non-compliance can, for example, have the following consequences:
–Hazards to persons due to electrical, thermal, mechanical and chemical
effects and explosions
– Failure of important product functions
– Failure of prescribed maintenance and servicing practices
– Hazard to the environment due to hazardous substances
2.6 Safety awareness
In addition to the safety information contained in this manual and the intended use,
the following safety regulations shall be complied with:
▪Accident prevention, health and safety regulations
▪Explosion protection regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards and laws
2.7 Safety information for the operator/user
▪Provide the personnel with protective equipment and make sure it is used.
▪Contain leakages so as to avoid any danger to persons and the environment.
Adhere to all relevant laws.
▪Eliminate all electrical hazards. (In this respect refer to the applicable national
safety regulations and/or regulations issued by the local energy supply
companies.)
2 Safety
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▪Take suitable precautions to prevent persons from coming near the propeller
when the submersible mixer is running.
▪It is strictly prohibited for any person to enter the tank while the submersible
mixer is running.
2.8 Safety information for maintenance, inspection and installation work
▪Modifications or alterations of the submersible mixer are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts authorised by the manufacturer. The use of
other parts can invalidate any liability of the manufacturer for resulting damage.
▪The operator ensures that all maintenance, inspection and installation work is
performed by authorised, qualified specialist personnel who are thoroughly
familiar with the manual.
▪Carry out work on the submersible mixer during standstill only.
▪The submersible mixer must have cooled down to ambient temperature.
▪When taking the mixer out of service always adhere to the procedure described
in the manual.
▪Decontaminate submersible mixers used in fluids posing a health hazard.
▪As soon as the work is completed, re-install and/or re-activate any safety-relevant
and protective devices. Before returning the product to service, observe all
instructions on commissioning.
2.9 Unauthorised modes of operation
Never operate the submersible mixer outside the limits stated in the data sheet and
in this manual.
The warranty relating to the operating reliability and safety of the submersible mixer
supplied is only valid if the mixer is used in accordance with its intended use.
2.10 Explosion protection
Always observe the information on explosion protection given in this section when
operating the submersible mixer in potentially explosive atmospheres.
Sections of the manual marked by the Ex symbol apply to explosion-proof
submersible mixers also when temporarily operated outside of potentially explosive
atmospheres.
Only submersible mixers marked as explosion-proof and identified as such in the data
sheet must be used in potentially explosive atmospheres.
Special conditions apply to the operation of explosion-proof submersible mixers to EC
Directive 94/9/EC (ATEX).
When operating explosion-proof mixers, especially adhere to the additional
requirements marked by the Ex symbol.
The explosion-proof status of the submersible mixer is only assured if the submersible
mixer is used in accordance with its intended use.
Never operate the submersible mixer outside the limits stated in the data sheet and
on the name plate.
Prevent impermissible modes of operation at all times.
Correct monitoring of the winding temperature is imperative.
2.10.1 Repair
Special regulations apply to repair work on explosion-proof submersible mixers.
Modifications or alterations of the submersible mixer may affect explosion protection
and are only permitted after consultation with the manufacturer.
Repair work at the flameproof joints must only be performed in accordance with the
manufacturer's instructions. Repair to the values in tables 1 and 2 of EN 60079-1 is
not permitted.
!DANGER
2 Safety
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3 Transport/Temporary Storage/Disposal
3.1 Transport
DANGER
Improper transport
Danger to life from falling parts!
Damage to the submersible mixer!
▷Use the attachment point provided on the lifting bail for attaching lifting
accessories.
▷Never suspend the submersible mixer by its power cable.
▷Never use chains or lifting ropes included in KSB´s scope of supply for lifting
loads other than the KSB product supplied.
▷Safely attach lifting ropes or chains to the submersible mixer and crane.
Transport the submersible mixer as shown.
Fig. 1: Transporting the submersible mixer
3 Transport/Temporary Storage/Disposal
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3.2 Storage/Preservation
If commissioning is to take place some time after delivery, we recommend that the
following measures be taken for storage:
CAUTION
Improper storage
Damage to the power cables!
▷Support the power cables at the cable entry to prevent permanent deformation.
▷Only remove the protective caps from the power cables at the time of
installation.
CAUTION
Damage during storage by humidity, dirt or vermin
Corrosion/contamination of the submersible mixer!
▷For outdoor storage cover the (packed or unpacked) submersible mixer and
accessories with waterproof material.
▪Store the submersible mixer under dry and vibration-free conditions, if possible
in its original packaging.
Table 4: Ambient conditions for storage
Ambient conditions Value
Relative humidity 5 % to 85 %
(non-condensing)
Ambient temperature - 10 °C to + 70 °C
3.3 Return to supplier
1. Always flush and clean the submersible mixer, particularly if it has been used in
noxious, explosive, hot or other hazardous fluids.
2. If the submersible mixer has been used in fluids leaving residues which might
lead to corrosion when coming into contact with atmospheric humidity, or which
might ignite when coming into contact with oxygen, the submersible mixer must
also be neutralised and treated with anhydrous inert gas for drying purposes.
3. Always complete and enclose a certificate of decontamination when returning
the submersible mixer.
Always indicate any safety and decontamination measures taken.
NOTE
If required, a blank certificate of decontamination can be downloaded from the KSB web
site at: www.ksb.com/certificate_of_decontamination
3.4 Disposal
WARNING
Fluids posing a health hazard
Hazardous to persons and the environment!
▷Submersible mixers used in fluids posing a health hazard must be
decontaminated.
▷Collect and properly dispose of flushing liquid and any liquid residues.
▷Wear safety clothing and a protective mask, if required.
▷Observe all legal regulations on the disposal of harmful substances.
1. Dismantle the submersible mixer.
Collect greases and lubricating liquids during dismantling.
3 Transport/Temporary Storage/Disposal
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2. Separate and sort the materials, e.g. by:
- Metals
- Plastics
- Electronic waste
- Greases and lubricating liquids
3. Dispose of materials in acc. with local regulations or in another controlled
manner.
3 Transport/Temporary Storage/Disposal
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4 Description
4.1 General description
Submersible mixer with self-cleaning propeller for handling municipal or industrial
waste water and sludges, as well as for use in biogas applications.
4.2 Designation
Example: Amaprop V 46-2500/5 4 YR G
Table 5: Key to designation
Code Description
Amaprop Type series
V Propeller material, e.g.: V = composite material
46 Nominal propeller speed
2500 Nominal propeller diameter, e.g.: 2500 mm
5 Motor size
4 Number of motor poles
YR Motor version, e.g. YR = explosion-proof version
G Housing material, e.g. G = grey cast iron
4.3 Name plate
TYPE
No.
Q
P2
KSB Aktiengesellschaft
67227 Frankenthal
Mat. No: 01080556 ZN 3826 - M 12
TEMP. MAX.
WARNUNG - NICHT UNTER SPANNUNG ÖFFNEN
WANING - DO NOT OPEN WHEN ENERGIZED
AVERTISSEMENT - NE PAS OUVRIR SOUS TENSION
a) b)
°C kg
H
Motor IP 68 SUBM. MAX. 30 m CLASS F
3~ M.-No.
kW VHz cos φ
min-1
AIA/INS1
TYPE
No.
Q
P2
KSB Aktiengesellschaft
67227 Frankenthal
Mat. No: 01080566 ZN 3826 - M 16
TEMP. MAX.
WARNUNG - NICHT UNTER SPANNUNG ÖFFNEN
WANING - DO NOT OPEN WHEN ENERGIZED
AVERTISSEMENT - NE PAS OUVRIR SOUS TENSION
II2G Ex dc IIB T4
°C kg
H
Motor IP 68 SUBM. MAX. 30 m CLASS F
3~ M.-No.
kW VHz cos φ
min-1
AIA/INS1
0035 II2G Ex d IIB T4 PTB 02 ATEX 1055
1
2
3
10
11
5
4
6
7
8
9
13
14
15
12
16
17
18 20
19
AMAPROP V 46 - 2500 / 54 URG
9971511000/000310
40 231
2010
DKM 112 M4
6,5
1445 12,7 / 7,4 6,0
0,87
400/690 50
242823
AMAPROP V 46 - 2500 / 54 YRG
9971511000/000310
40 231
2010
DKM 112 M4
6,5
1445 12,7 / 7,4 6,0
0,87
400/690 50
242823
Fig. 2: Name plate a) Standard submersible mixer, b) explosion-proof submersible mixer
1 Designation 2 KSB order and order item number
3 Max. fluid and ambient temperature 4 Enclosure
5 Motor type 6 Rated power
7 Rated speed 8 Rated voltage
9 Rated current 10 Year of construction
11 Total weight 12 Maximum immersion depth
13 Thermal class of winding insulation 14 Motor number
15 Power factor at design point 16 Rated frequency
17 Mode of operation 18 Starting current ratio
19 Marking for an explosion-proof mixer 20 ATEX marking for the submersible motor
4.4 Design details
Design
▪Fully floodable submersible mixer
▪Horizontal installation
4 Description
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Propeller
▪Self-cleaning (ECB) propeller
Shaft seal
▪Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
▪Additional leakage chamber between the mating ring holder and the gear unit
Bearings
▪Grease-packed rolling elements bearings (sealed for life) in the motor
▪Oil-lubricated rolling element bearings in the gear unit
Drive
▪Three-phase asynchronous squirrel-cage motor
Motors integrated in explosion-proof submersible mixers are supplied in type of
protection Ex d IIB.
4.5 Configuration and function
2 3 4
5678
1
Fig. 3: Sectional drawing
1 Gear shaft 2 Housing
3 Stator 4 Cable gland
5 Propeller 6 Mechanical seal
7 Rolling element bearing 8 Rotor
Submersible mixer with gear unit and self-cleaning propeller (5) for mixing and
keeping in suspension municipal or industrial waste water and sludges.
Driven by the motor, the propeller (5) generates thrust for inducing the required
flow in the fluid handled.
Design
Function
4 Description
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The gear shaft (1) of the submersible mixer is equipped with two bi-rotational
mechanical seals (6) in tandem arrangement. A lubricant reservoir between the two
mechanical seals ensures cooling and lubrication.
The cable gland (4) is totally watertight.
4.6 Scope of supply
Depending on the model, the following items are included in the scope of supply:
▪Submersible mixer, complete with lifting bail and power cable
▪Support for power cable
▪Two shackles (for hoisting tackle and cable support)
▪Separate name plate
NOTE
A separate name plate is included in KSB's scope of supply.
This name plate must be attached in a clearly visible location outside the place of
installation, e.g. in the control cabinet or on the mounting bracket.
▪Installation parts
▪Cable supports for properly routing the electrical cables inside the tank
▪Forcing screw
▪Other accessories on request
4.7 Dimensions and weights
For dimensions and weights please refer to the general arrangement drawing/outline
drawing and data sheet of the submersible mixer.
Sealing
Accessories
4 Description
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5 Installation at Site
5.1 Safety regulations
DANGER
Improper installation in potentially explosive atmospheres
Explosion hazard!
Damage to the submersible mixer!
▷Comply with the applicable local explosion protection regulations.
▷Observe the information given in the data sheet and on the name plate.
DANGER
Persons entering the tank
Electric shock!
▷Never start up the submersible mixer when there are persons inside the tank.
WARNING
Hands, other body parts, or foreign objects in the propeller or propeller intake area
Risk of personal injury! Damage to the submersible mixer!
▷Never place your hands, other body parts or foreign objects into the propeller
or propeller intake area.
5.2 Checks to be carried out prior to installation
5.2.1 Checking the operating data
Before setting up the submersible mixer, verify that the name plate data matches the
data given in the purchase order and the system data.
5.2.2 Preparing the place of installation
WARNING
Installation on foundations which are unsecured and cannot support the load
Personal injury and damage to property!
▷Make sure the foundation concrete is of sufficient strength (min. C20/25 to
DIN 1045).
▷Only place the installation set on a foundation whose concrete has set firmly.
▷Refer to the weights given in the data sheet/ on the name plate.
NOTE
In biogas installations, provide the possibility for visually monitoring and, if necessary,
adjusting the operating conditions of the submersible mixer (monitoring window).
NOTE
For servicing submersible mixers in biogas installations, access openings and
appropriate means of removal (lifting gear) must be provided so that the mixer can be
removed from the filled tank at any time. For this purpose, it is important to observe the
minimum removal dimensions for the submersible mixer as specified in the general
arrangement drawing/outline drawing and in the data sheet.
1. Check structural requirements.
All structural work required must have been prepared in accordance with the
dimensions stated in the outline drawing/general arrangement drawing.
5 Installation at Site
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5.2.3 Checking the lubricant level
903.01
411.01
Lubricant filler plug
on gear unit
Lubricant check plug
on gear unit
Fig. 4: Checking the lubricant (propeller not shown)
The lubricant reservoirs are filled with an environmentally-friendly, non-toxic
lubricant at the factory.
1. Position the submersible mixer as shown.
2. Undo screw plug 903.01 and joint ring 411.01.
⇨The lubricant level must reach the filler opening.
3. If the lubricant level is lower, top up lubricant through the filler opening until
the lubricant reservoir overflows.
4. Fit screw plug 903.01 and joint ring 411.01 again.
1. Unscrew the lubricant check plug on the gear unit.
⇨The lubricant level must reach the filler opening.
2. If the lubricant level is lower, unscrew the lubricant filler plug on the gear unit
and top up lubricant through the filler opening until the lubricant flows out of
the lubricant check opening.
Checking lubricant level of
mechanical seal
Checking lubricant level of
gear unit
5 Installation at Site
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3. Screw in the lubricant check plug of the gear unit and the lubricant filler plug, if
applicable.
5.3 Setting up the submersible mixer
CAUTION
Incorrect installation position of submersible mixer
Damage by excessive stresses or strains!
▷Observe the data given in the general arrangement drawing.
▷Installation in other positions is only permitted after prior consultation with and
approval by KSB.
Mount the submersible mixer on the applicable installation set as described in the
separate "Installation parts/accessories" installation instructions.
5.4 Electrical connection
5.4.1 Information for planning the control system
For the electrical connection of the submersible mixer observe the wiring diagrams
contained in the Annex.
The submersible mixer is supplied with a power cable and is wired for DOL starting.
For motors 4 4 and 5 4, star-delta starting is also possible.
NOTE
When laying a cable between the control system and the submersible mixer's connection
point, make sure to have a sufficient number of cores for the sensors! A minimum cable
cross-section of 1.5 mm² is required.
5.4.1.1 Overload protection
1. Protect the submersible mixer against overloading by a thermal time-lag
overload protection device in accordance with IEC 947 and local regulations.
2. Set the overload protection device to the rated current specified on the name
plate. (⇨ Section 4.3 Page 13)
5.4.1.2 Level switch
DANGER
Dry-running of submersible mixer
Explosion hazard!
▷Never allow an explosion-proof submersible mixer to run dry!
CAUTION
Propeller not fully submerged
Damage to the submersible mixer!
▷Never allow the liquid level to drop below the submersible mixer during mixer
operation (not even for short periods).
Automatic mixer operation in a tank requires the use of level control equipment.
Observe the specified minimum fluid level. (⇨ Section 6.2.2.1 Page 25)
5.4.1.3 Frequency inverter operation
The submersible mixer is suitable for frequency inverter operation as per IEC
60034-17.
5 Installation at Site
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Active 29/10/2013
Page 18 of 60

NOTE
Amaprop 1000 or 2500 mixers installed in biogas plants must be operated with frequency
inverters!
DANGER
Operation outside the permitted frequency range
Explosion hazard!
▷Never operate an explosion-proof submersible mixer outside the specified
range.
DANGER
Incorrect setting of frequency inverter current limit
Explosion hazard!
▷Set the current limit to max. 1.2 times the rated current indicated on the name
plate.
When selecting the frequency inverter, check the following details:
▪Data provided by the manufacturer
▪Electrical data of the submersible mixer, particularly the rated current
Observe the following limits when operating the submersible mixer via frequency
inverter:
▪Only utilise up to 95 % of the motor power rating P2 indicated on the name
plate. (⇨ Section 4.3 Page 13)
▪Frequency range 25-50 Hz
If the mixers are operated via frequency inverter, RFI emissions will occur, the level of
which varies depending on the inverter used (inverter type, interference suppression
features, manufacturer). To ensure compliance of the drive system consisting of
submersible motor and frequency inverter with the limits stipulated by EN 50081,
always observe the EMC information provided by the inverter manufacturer. If the
manufacturer recommends shielded power cables, a submersible mixer with shielded
power cable must be used.
The submersible mixers generally meet the requirements on interference immunity
stipulated by EN 50082. For monitoring the sensors installed, the operator must
ensure sufficient interference immunity by selecting and routing the cable in the
plant accordingly. No modifications are required on the power cable of the
submersible mixer itself. Suitable analysing devices must be selected. In this case we
recommend to monitor the leakage sensor fitted inside the motor by means of a
special relay available from KSB.
5.4.1.4 Sensors
DANGER
Operating an incompletely connected submersible mixer
Explosion hazard!
▷Never start up a submersible mixer with incompletely connected power cables
or non-operational monitoring devices.
The submersible mixer is equipped with sensors designed to prevent hazards and
damage to the mixer.
Measuring transducers are required for analysing the sensor signals supplied. Suitable
devices for 230V~ can be supplied by KSB.
NOTE
Reliable and safe operation of the submersible mixer within the scope of our warranty is
only possible if the sensor signals are properly analysed as stipulated in the manual.
Selection
Operation
Electromagnetic
compatibility
5 Installation at Site
Amaprop® 19 of 60
Goodnal STP ST041 Biological Treatment (KSB Amaprop Installation and Operating Manual) Vendor Manual
Q-Pulse Id VM386
Active 29/10/2013
Page 19 of 60

All sensors are located inside the submersible mixer and are connected to the power
cable.
For information on wiring and core identification please refer to the wiring
diagrams. (⇨ Section 9.3 Page 49)
The individual sensors and the limit values to be set are described in the following
sections.
5.4.1.4.1 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
▷Never operate an explosion-proof submersible mixer without operational
temperature monitoring equipment.
▷For explosion-proof submersible mixers, use a thermistor tripping unit with
manual reset and ATEX approval for monitoring the temperature of explosion-
proof motors in "flameproof enclosure Ex d" type of protection.
CAUTION
Insufficient cooling
Damage to the submersible mixer!
▷Never operate a submersible mixer without operational temperature
monitoring equipment.
The motor is monitored by three series-connected PTC thermistors with terminals 10
and 11. Tripping must result in the submersible mixer cutting out. Automatic re-start
is not permitted. On explosion-proof submersible mixers, they must be connected to
a thermistor tripping unit with manual reset and ATEX approval for monitoring the
temperature of explosion-proof motors in "flameproof enclosure Ex d" type of
protection.
5.4.1.4.2 Leakage inside the motor
PE
K 1
9
B2
B2
a) b)
Fig. 5: a) Wiring of the electrode relay and b) Position of the electrode in the motor
housing
An electrode (B2) fitted inside the motor monitors the winding and connection space
for leakage. This electrode must be connected to an electrode relay (core marked 9).
Tripping of the electrode relay must result in the submersible mixer cutting out.
5 Installation at Site
20 of 60 Amaprop®
Goodnal STP ST041 Biological Treatment (KSB Amaprop Installation and Operating Manual) Vendor Manual
Q-Pulse Id VM386
Active 29/10/2013
Page 20 of 60