NetterVibration NEA Series User manual

Operating instructions for
Netter electric external vibrators
Series NEA/NEG/NEG S/NES
March 2021
No. 1929E
Page 1/35
These operating instructions apply to:
Series NEA
Series NEG
Series NEG S
Series NES

2
Contents
1General information 3
2Safety 6
3Technical data 11
4Design and function 13
5Transport and storage 14
6Installation 15
7Start-up and operation 19
8Maintenance and servicing 26
9Troubleshooting 31
10 Spare parts and accessories 33
11 Disposal 35
Please refer to the delivery note for the scope of delivery.
Check the packaging for possible transport damage. In the event of
damage to the packaging, check the contents for completeness and
possible damage. Inform the carrier in the case of damage.
The electric external vibrators of the series NEA, NEG, NEG S and NES
are hereafter referred to as "NEA/NEG".
Document no.
1929E
Version no.
3
Date of issue
March 2021
Scope of
delivery
Designation
Version of
document

General information
3
1 General information
Before installing the NEA/NEG read these instructions carefully. It is the
basis for any action when dealing with the NEA/NEG, and may be used for
training purposes. The instructions should be subsequently stored at the
operation site.
The target group for these instructions is technical staff, who have basic
knowledge of mechanics, electrics and explosion protection.
Only complying technical staff may work on the NEA/NEG.
The NEA/NEG may only be installed, put into operation, maintained, trou-
bleshot and disassembled by persons authorised by the operator.
This documentation is protected by copyright.
Netter Vibration reserves all rights such as translations, reprinting and re-
production of the instructions, as well as parts thereof.
All technical information, data and instructions for installation, operation
and maintenance in these instructions are based on the latest information
available at the time of printing and take our past experience to the best of
our knowledge into account.
No claims can be derived from the information, illustrations and descrip-
tions in these operating instructions.
The manufacturer does not assume liability for damages resulting from:
•failure to observe the instructions,
•improper use,
•unauthorised repairs,
•technical modifications,
•use of non-permissible spare parts.
Translations are made to the best of our knowledge.
Netter Vibration does not assume liability for translation errors, even if the
translation was made by us or on our behalf. Only the original German text
remains binding.
The electric external vibrators of the series NEA, NEG, NEG S and NES
comply with the EC Machinery Directive 2006/42/EC, the electromagnetic
compatibility directive 2014/30/EU and the low voltage directive
2014/35/EU.
In particular the standards EN ISO 12100, EN 60529 and DIN EN 60034-1
has been observed.
All electric external vibrators of the series NEA, NEG, NEG S and NES,
labelled with the Ex-Symbol on the type plate, comply with the ATEX Di-
rective 2014/34 EU for equipment group II.
NEA/NEG of housing size 50 and 60 are suitable for use in potentially ex-
plosive areas of the category 3D in the zone 22.
Use and
storage
Target group
Copyright
Limitation of
liability
Directives /
standards
observed

General information
4
NEA/NEG from housing size 100 upwards are suitable for use in potential-
ly explosive areas of the category 2D in the zone 21 and 22.
In particular the standards DIN EN IEC 60079-0 and DIN EN 60079-31
(IEC 60079-31) are observed.
Before using the NEA/NEG the operator must exclude the possibility that
the introduction of vibrational energy poses the risk of explosion.
The following instruction and warning symbols are used in these instruc-
tions:
DANGER
indicates an immediate danger.
Disregard of this notice will result in death or severe person-
al injuries.
WARNING
indicates a potential danger.
Disregard of this notice can result in death or severe per-
sonal injuries.
CAUTION
indicates a potentially dangerous situation.
Disregard of this notice can result in minor or moderate per-
sonal injuries.
NOTICE
indicates potential material damage.
Disregard of this notice can result in material damage.
Instruction
and warning
symbols
Personal
injuries
Material
damages

General information
5
IMPORTANT
indicates actions, methods or notes that are not relative to safety, e.g. use-
ful information and tips.
Environmentally safe disposal
indicates the obligation of environmentally safe disposal.
Explosion prevention
indicates information on explosion prevention.
When operating the NEA/NEG in potentially explosive areas all notes,
marked with the Ex-symbol , must be observed.
Explanations of abbreviations in the type designation:
XXX YYZZZZ-WWW
XXX indicates the type of vibrator (three-phase or single-phase):
•NEA = single-phase alternating current
•NEG = 3-phase alternating current
•NES = 3-phase alternating current (stainless steel housing)
YY indicates the polarity:
•50 = 2 poles
•25 = 4 poles
•16 = 6 poles
•12 = 8 poles
ZZZZ indicates the centrifugal force in daN (Decanewton).
WWW indicates special features:
•K= 130°C PTC thermistor installed (standard from housing size 170
upwards)
•K2 = 120°C PTC thermistor installed
•TS = 130°C thermal protector with a normally closed (NC) switching
contact
•TS2 = 120°C thermal protector with a normally closed (NC) switching
contact
•H= 200-240V anti-condensation heater 0-50W
•H110 = 100-120V anti-condensation heater 0-50W
•HD = Fully encapsulated stator (heavy duty)
Suffix Sbehind the type designation = stainless steel housing
Notes
ATEX-notes
Type designa-
tions

Safety
6
2 Safety The NEA/NEG are intended for generating circular vibrations.
General applications are: loosening, conveying, sorting, compacting, sepa-
rating bulk materials and reducing friction. NEA/NEG are used for empty-
ing bunkers, as drives for conveyor troughs, sieves and vibrating tables.
The NEA/NEG are designed for installation in machines and may only be
put into operation, if it has been assured that the complete machine com-
plies with the regulations of the machinery directive.
Any other use is considered improper.
Installation, commissioning, maintenance and troubleshooting of the
NEA/NEG may only be performed by authorised qualified personnel.
All handling of the NEA/NEG is the responsibility of the operator.
All accessory parts connected to the NEA/NEG, which ensure correct
operation and safety, must have the appropriate degree of protection for
this specific purpose.
IMPORTANT
Netter Vibration assumes no liability for personal injuries and material
damages if technical changes to the product were made or the notices and
regulations in these instructions were not observed.
DANGER
Electric shock
An electric shock will result in serious injury or even death.
The NEA/NEG must be free of voltage during assembly,
start-up, maintenance and troubleshooting.
Observe the following five safety rules:
1. Disconnect the NEA/NEG from the mains supply.
2. Secure the NEA/NEG against re-activation.
3. Establish that the NEA/NEG has no voltage.
4. Earth and short-circuit the power supply of the NEA/NEG.
5. Cover adjacent live parts or fence them off.
Intended use
Qualification
of qualified
personnel
Accessory
parts
Liability
Safety
rules

Safety
7
DANGER
Risk of electric shock due to high voltage
An electric shock leads to serious injuries or even death.
➢Observe the permissible protection class and earthing.
The NEA/NEG may only be operated with the correct
connection of the protective conductor.
➢Perform all work only with insulated tools suitable for the
application.
➢All work on the system may only be carried out in a volt-
free state.
➢Never open the terminal box cover when voltage is ap-
plied.
➢Never loosen or remove paint-sealed screws.
➢Never touch or remove safety covers.
➢Protect the NEA/NEG against falling parts during all
work. Metal parts can cause a short circuit within the
NEA/NEG.
WARNING
Spark formation
Opening the terminal box cover of the NEA/NEG in Ex-
zones can cause spark formation and thus lead to an explo-
sion due to ignition of an explosive atmosphere.
➢Never open terminal box covers in a potentially explosive
atmosphere or when voltage is applied.
➢If terminal box covers or unbalance covers are open,
check the condition and correct positioning of the seals.
➢Damaged seals must be replaced immediately.
➢The mechanical protection of the housing (IP6X) must be
assured after assembly of the covers.
High voltage
Spark
formation

Safety
8
WARNING
Spark formation
The impact of corroded steel parts on the aluminium hous-
ing at high speed can cause spark formation and thus lead
to an explosion.
➢Choose the installation position carefully, so that there
are no external impacts.
➢Fasten the NEA/NEG securely.
➢Check the fastening regularly (generally monthly).
WARNING
Hazard of electrostatic discharge
When cleaning the NEA/NEG with a dry cloth there is a risk
of electrostatic discharge. A electrostatic discharge can lead
to an explosion due to ignition of an explosive atmosphere.
➢Only clean the NEA/NEG with a wet cloth.
➢Remove dust deposits regularly.
➢The following warning label is located
on the NEA/NEG and must be observed:
WARNING
Static electricity
The discharge of charged, isolated conductive parts can
cause ignitable sparks.
➢Connect the earthing screw of the NEA/NEG to the po-
tential equalisation of the higher-level machine.
➢Include all components in the potential equalisation of
the machine.
Spark
formation
Static
electricity
Static
electricity

Safety
9
WARNING
Hot surface
If the permissible operating conditions and the maintenance
requirements are not observed or if the vibrator does not fit
the application, the housing surface may become very hot.
In Ex-zones there is a risk of ignition of an explosive atmos-
phere due to hot surfaces.
➢Observe all permissible operating conditions.
➢Carry out the specified maintenance work at the prede-
fined intervals.
➢Make sure that the vibrator is suitable for the application
and has been dimensioned correctly. Get advice from
application technicians of Netter Vibration.
➢For operating the NEA/NEG in potentially explosive at-
mosphere, it is mandatory to connect the PTC-
thermistor. This regulation does not apply if the vibrator
is not equipped with a PTC-thermistor.
NEA/NEG from housing size 170 upwards are equipped with thermistors
type PTC 130 °C as standard. For smaller NEA/NEG available on request
as initial equipment.
WARNING
Risk of injury while handling heavy parts
Risk of serious injury due to weight during transport and installation of the
NEA/NEG.
➢Observe the weight information in Chapter Technical data, from page
11 on.
➢Only qualified personnel may transport and install the NEA/NEG.
➢Use suitable load handling devices and slinging equipment.
➢Wear suitable personal protective equipment.
Hot surface
Heavy parts

Safety
10
WARNING
Falling parts
The NEA/NEG or parts of the construction can come loose due to vibra-
tion. Falling parts can lead to severe personal injuries.
➢Use only suitable fastening screws and safety washer to attach the
NEA/NEG.
For attachment Netter Vibration recommends using Netter fastening
kits NBS.
➢Check the fastening screws after one hour of operation and thereafter
regularly (generally monthly).
➢Retighten the fastening screws, if necessary. Use a torque wrench and
tighten the screws crosswise.
➢In critical installation situations suitable securing is mandatory.
WARNING
Risk of injury due to rotating unbalances
During operation of the NEA/NEG without unbalance covers there is risk of
injury due to rotating unbalances.
➢Operate the NEA/NEG only with mounted unbalance covers.
CAUTION
Risk of burns due to hot surfaces
NEA/NEG can strongly heat up during operation. Direct contact may cause
burns.
➢Do not touch the NEA/NEG or the cable near the cable gland during
operation or shortly after being switched off.
➢Only operate the vibrators within the permissible ambient temperature,
according to Ch. Technical data, page 11.
Falling parts
Rotating
Unbalances
Hot surfaces

Technical data
11
3 Technical data
Nominal volt-
age, nominal
frequency
The main voltage and the main frequency must comply with the nomi-
nal voltage and nominal frequency indicated on the type plate.
Permissible Voltage deviation: +/- 5 %
Permissible frequency deviation: +/- 2 %
Possible power supply with:
•fixed voltage and frequency or
•frequency converter
The operation of NEG with frequency converters allows rotary speeds
> nominal frequency. If the NEG are operated with a frequency con-
verter, the maximum centrifugal force must not be exceeded (accord-
ing to the type plate). The compliance with the electromagnetic com-
patibility directive 2014/30/EU has to be ensured.
In the ATEX-zones 21 and 22 the frequency converter may regu-
late the frequency between 20 Hz and 50 Hz or 20 Hz and 60 Hz at a
constant torque load (linear volt-hertz-curve). Please observe the max.
frequency on the type plate. For operation with frequency converter in
ATEX-zones the PTC thermistor must be connected.
Rotary speed
ranges
2-pole: 3000 rpm 50 Hz / 3600 rpm 60 Hz.
4-pole: 1500 rpm 50 Hz / 1800 rpm 60 Hz.
6-pole: 1000 rpm 50 Hz / 1200 rpm 60 Hz.
8-pole: 750 rpm 50 Hz / 900 rpm 60 Hz.
Permissible
ambient tem-
peratur*
-20 °C to 40 °C or
-20 °C to 55 °C
The maximum ambient temperature specified on the type plate must
not be exceeded.
These values are valid for operation with an ON-period of 100 %. For
the following operation modes special requirements apply:
•cycled operation or
•frequency-controlled operation or
•synchronous operation.
These must be clarified with Netter Vibration on a case-by-case basis.
Thermal over-
load protection
From housing size 170 upwards with thermistor type PTC 130 °C as
standard.
For smaller vibrators available on request as initial equipment.
If the NEA/NEG is operated in environments with potentially explo-
sive dust (zone 21/22), it is mandatory to connect the PTC-thermistor.
This regulation does not apply if the unit is not equipped with a PTC-
thermistor.
Sound level
Depending on type ≤ 70 dB(A)
The sound level is determined to a great extent by the surface upon
which the NEA/NEG is mounted (e.g. sheet metal). The sound level will
be amplified by non-silenced sheet metal.
* Higher temperatures are only possible after consultation with and written approval from the application techni-
cians of NetterVibration.
Permissible
operating
conditions

Technical data
12
1
type designation
2
rotary speed
3
nominal voltage
4
current
5
phases
6
serial number
7
year of manufacture / de-
gree of protection
8
insulation class
9
power
10
nominal frequency
11
centrifugal force
12
duty cycle
13
ATEX certification
1
type designation
2
nominal voltage
3
current
4
phases / capacity
5
power factor
6
year of manufacture
7
serial number
8
max. ambient temperature
9
insulation class / degree of
protection
10
power output
11
power input
12
rotary speed / nominal fre-
quency
13
centrifugal force
14
duty cycle
15
ATEX certification
The values can be found on the type plate. The type plate is located on the hous-
ing. For detailed technical data please refer to the brochure of the NEA/NEG.
Deviating customer-specific type plates (special designs) are possible.
Netter Vibration recommends the following tightening torques [Nm]:
Type
M4
M5
M6
M8
M10
M12
M16
M20
M22
M24
Fastening screws and
nuts, steel
Property class 8.8*
-
-
10
25
50
87
210
411
559
711
Fastening screws for XS-
unbalances, steel
Property class 12.9**
-
-
-
42
83
146
360
710
970
1225
Fastening screws and
nuts, stainless steel
8.8
21.4
44
74
183
-
-
-
Terminal plate nuts, steel
1.2
2.0
3.0
6.5
13.5
-
-
-
-
-
Screws as supplied, without additional lubrication.
* coefficient of sliding friction 0.14 ** coefficient of sliding friction 0.15
Always use a torque wrench and tighten the screws crosswise.
Type
M13x1
M15x1
M20x1
M25x1.5
M30x2
M45x1.5
Locking nuts
(Pos. 21) see page 29
30
50
100
170
340
500
Type plate for
housing sizes
50 and 60
Type plate
from housing
size 100
Tightening
torques

Design and function
13
4 Design and function
Example: NEG 501140
Example: NEG 50120
Nr.
Element
Function
1
Housing
Contains and protects the components of the
NEA/NEG.
2
Unbalance covers
Protect against grabbing into the unbalances.
3
Housing foot
Attach the NEA/NEG to the mounting surface.
4
Type plate
Shows model specific information and data.
5
Terminal box
Housing sizes 101 to 120:
terminal box integrated in housing
foot.
Contains the electrical connections.
6
Cable gland
(depending on type).
Connect the NEA/NEG.
The electric external vibrators of the series NEA, NEG, NEG S and NES
are asynchronous motors with adjustable weights (unbalances) mounted
on their shaft ends.
The NEA/NEG generate circular vibrations, that means the vibrations act
in all directions of a plane.
The frequency can be controlled continuously with the help of frequency
converters.
The centrifugal force can be changed by adjustment of the unbalances.
Design
Function

Transport and storage
14
5 Transport and storage
Observe the safety instructions in Ch. Safety, from page 6 on.
Please refer to the brochure for weights and dimensions.
When transporting the NEA/NEG, ensure that the NEA/NEG is not sub-
jected to strong impacts or vibrations that could damage the bearings.
Please observe the following notes:
•Use only the transport eyelet/eyelets (1) for lifting the NEA/NEG. If the
vibrator is fitted with two transport eyes, both must be used for lifting.
•The pulling direction must not exceed 45°.
•Lifting tools are of the usual kind such as a pulley or a crane. When
moving loads, use suitable steel cables or hoisting slings which are suf-
ficiently dimensioned for these weights.
•Handle the NEA/NEG very carefully during transport.
The NEA/NEG are packed ready for installation.
The packaging protects the NEA/NEG from transport damage. The pack-
aging material has been selected from an environmentally safe and tech-
nically disposable point of view and is therefore recyclable.
The return of packaging to the material cycle conserves raw materials and
reduces the amount of waste.
•Store the NEA/NEG in a dry and clean environment.
•The permissible storage temperature is between -15 °C and +60 °C.
•The permissible relative humidity is max. 60 %.
•The storage time is max. 2 years.
•If the vibrator is operated in areas with potentially explosive dust
(zone 21 or 22) a revision at Netter Vibration is mandatory after a stor-
age time of more than one year.
•Do not store the NEA/NEG outdoors. The electrical components are
not protected against corrosion.
Transport-
conditions
Packaging
Storage

Installation
15
6 Installation
Observe the safety instructions in Ch. Safety, from page 6 on.
Please refer to the brochure for weights and dimensions.
Important: For NEA/NEG with housing size 101 to 120 the terminal box is
integrated in the housing foot. These vibrators must be electrically con-
nected before fastening.
The NEA/NEG can be operated in any position.
1. Notice: The feet of the NEA/NEG must lie completely on the surface
so that there is no tension in the housing when tightening the fas-
tening screw/screws, which could cause mechanical damage. The
mounting surface has to be flat (±0.1 mm flatness) and clean with no
paint residues or burn-ins.
2. The vibrators can be fastened with fastening screws of quality 8.8
(DIN 931 or 933). These must be secured with appropriate locking de-
vices and checked and retightened at regular intervals (usually month-
ly). For safe fastening Netter Vibration recommends the use of fas-
tening kits NBS consisting of a screw, a special lock washer and (for
NBS D) a nut.
Fasten the NEA/NEG with the fastening screws on the mounting sur-
face. Use a torque wrench and tighten the screws crosswise. Observe
the recommended values for screw sizes and tightening torques, see
chap. Technical data, from page 11. Higher tightening torques may
cause fracture of screws or tearing of threads.
Warning: Unsuitable screw connections may cause loosening of the
NEA/NEG by vibration. This can cause damage to persons and mate-
rial.
3. Use an additional safety device for critical
installation situations, e.g. steel cable NSE.
Use the wire cable clamps to set the safety
cable to the shortest possible cable length.
The safety cable must always be ten-
sioned.
Fastening
the NEA/NEG

Installation
16
The following requirements and conditions must be met to connect the
NEA/NEG electrically:
•The permissible operating conditions must be met. Please refer to
chap. Technical data, page 11 for operating conditions.
•A suitable overload protection (1) must be
pre-connected to each vibrator. The motor
protection switches must be interlocked with
each other in pairs, so that in the event of a
motor failure, the power supply from both
motors is interrupted at the same time in or-
der not to cause uncontrolled vibrations
which can damage the system.
In zone 21/22 the motor protection
switches must be approved for applications
in potentially explosive areas.
•If the vibrator is operated in areas with potentially explosive dust
(zone 21/22), it is compulsory to connect the PTC-thermistor. This reg-
ulation does not apply for NEA/NEG without a PTC-thermistor.
•In areas with potentially explosive
dust (zone 21/22), an external
grounding must also be made via the
earth connection on the housing foot.
•Only suitable, flexible supply cables must be used for connecting the
NEA/NEG. The conductors in the supply cable for the connection of the
NEA/NEG to the mains must be temperature-resistant and have a suf-
ficiently large cross-section, which is adapted to the cable length used.
The temperature resistance of the cables depends on the maximum
surface temperature (temperature class T) stated on the type plate.
When selecting the connection cables, consider that the cables are
mechanically stressed by vibration. Recommended cable types for
mains operation at 400 V, in potentially non-explosive atmosphere:
rubber hose line H07 RN-F or oil flex cable 110 CY.
For other voltages or other ambient conditions, the cables must be
adapted to the respective conditions and designed accordingly.
•All electrical cables must be carefully laid and must be protected from
high temperatures, lubricants and sharp edges. Care must be taken to
ensure that the cables are not chafed through by vibrating parts. The
correct condition of the electrical cables with their plugs must be
checked at regular intervals (usually every six months). Detected er-
rors are to be eliminated immediately.
•The cable fastening must be provided in close vicinity of the cable
entrance.
Electrical
connection

Installation
17
•The electrical parameters U, I, P on the type plate must be ob-
served.
•Tighten terminal plate nuts with pre-
scribed torque, see chap. Technical da-
ta, from page 11. Remember to put the
safety washer between the ring and the
nut and the vibration-damping insert
back.
•The wire ends must be fitted with suita-
ble insulated cable lugs, in order to pre-
vent the strands from splaying.
•For operating the NEA/NEG in areas with potentially explosive dust
(zone 21/22) the mechanical protection of the housing must be guaran-
teed (degree of protection IP66, housing size 50 and 60: IP65). After
having disassembled the terminal box cover or weight covers, the con-
dition and correct positioning of the seals has to be checked.
Open the terminal box to connect the NEG according to the type plate as
follows:
1
Earthing terminal for protective
conductor
(green-yellow)
2
PTC-Thermistor connection
(depending on the NEG-type)
Connect the NEG according to the type plate and the following circuit dia-
grams.
The green-yellow protective conductor must only be connected to the
earthing terminal.
Connection
examples NEG

Installation
18
Connection diagram
Series NEG / 3-phase current
Smaller voltage
Higher voltage
1: Earthing terminal for protective conduc-
tor
2: PTC-Thermistor connection (depending
on the type)
1: Earthing terminal for protective conduc-
tor
2: PTC-Thermistor connection (depending
on the type)
Connect the NEA according to the type plate:
1
capacitor box
L1
outer conductor (brown)
N
neutral conductor (blue)
PE
protective conductor
(green-yellow)
Cable with capacitor box
Capacitor in cable
Connection
examples NEA

Start-up and operation
19
7 Start-up and operation
Observe the safety instructions in chap. Safety, from page 6 on.
Please refer to chap. Technical data, page 11 for permissible operating
conditions.
•When commissioning the NEA/NEG, the rules and regulations of the
local associations for electrical engineering (e.g. VDE) and the valid
accident prevention regulations must be observed.
•The NEA/NEG must always be switched on and off at the main switch.
•When operating the NEA/NEG with a frequency converter, compliance
with the EMC directive must be ensured.
•If the speed is controlled with a frequency converter, the maximum
centrifugal force (according to the type plate) must not be exceeded.
NEA/NEG must be adapted to your application by adjusting the unbal-
ances. You can directly influence the vibration amplitude, centrifugal
force and current consumption.
•The NEA/NEG must not be operated without the covers for the unbal-
ances. The rotating unbalances cause a risk of injury.
•On initial start-up, the current consumption must be measured individ-
ually in all three phases and must correspond to the specifications on
the type plate.
•The terminal box cover must never be opened in the presence of volt-
age.
Special regulations for operation in an potentially explosive at-
mosphere:
•In ATEX-zones 21 and 22, the frequency converter may control the
frequency between 20 Hz and 50 Hz or 20 Hz and 60 Hz at constant
torque (linear Volt-Hertz curve). Observe maximum frequency on the
type plate.
•For operation with frequency converter in ATEX-zones the PTC ther-
mistor must be connected.
•The terminal box cover must never be opened in a potentially explosive
atmosphere.
•NEA/NEG may only be operated in atmospheres that do not damage
the material of the vibrators.
Carry out the following measures before start-up:
1. Check that the NEA/NEG have been mounted correctly and are in per-
fect condition.
2. Check that the NEA/NEG have been properly connected and earthed.
Permissible
operating
conditions
Regulations
Measures

Start-up and operation
20
3. Check that the cables are undamaged and laid according to the
known regulations and standards.
4. Check that all permissible operating conditions have been observed.
5. Check that all protective measures on the system have been ob-
served.
6. Eliminate possible errors before start-up.
7. Screw connections must be checked and, if necessary, retightened
after 1 h operating time (after initial start-up) and thereafter regularly
(generally monthly). Observe the recommended values for screw siz-
es and tightening torques, see chap. Technical data, from page 11
Standard network forms are TN and TT networks with an earthed star
point, as in Germany.
For overseas countries, also for countries within the EU, the mains volt-
age, the network configuration and the directives applicable there must
also be observed. In the case of deviations, the country, the standards, the
environmental conditions, as well as possible special features in the order,
must be agreed on in writing. If the NEA/NEG are operated and/or pow-
ered by another network configuration unknown to us, the guarantee ex-
pires completely and immediately.
The supply line must be protected according to the cross-section and the
nominal power of the NEA/NEG. The short circuit strength of this fuse
should be 25 kA.
Netter Vibration recommends a three-phase tripping (e. g. Schneider Elec-
tric GV2 L, Tesys Model U oder Compact NS).
For all NEA/NEG there is the possibility of unbalance adjustment to direct-
ly influence vibration amplitude, centrifugal force and current consumption.
Unless otherwise specified by you, the NEA/NEG were delivered with the
standard setting (100 %). If specifications have been made by the custom-
er, there are stickers with the current setting on the unbalance covers.
Notice: The unbalances may only be set mirror-symmetrically!
Power supply
Supply line
connection
Adjustment of
unbalances