ΑϏύώ΀VϕϒϚχύϋ
ΖϕϚϕϘϙ

-ΎϞϖϒϕϙϏϕϔ΀ϖϘϕϕό
͸΍΍ΘΛ͹
Ex db, Ex db eb, Ex tb

΀Standard ͸΍ΘΛ͹
Table of Contents

1 General specification 3
1.1 Standards and regulation .................................................................................................................................................... 3
1.2 Explosion protection in the hazard zones ........................................................................................................................ 3
1.3 Produktpalette der Motoren ............................................................................................................................................... 9

2 Mechanical characteristics 12
2.1 Setup conditions ...................................................................................................................................................................12
2.2 Model for lowest temperatures with stationary heating ............................................................................................12
2.3 Material ...................................................................................................................................................................................13
2.4 Paint.........................................................................................................................................................................................13
2.5 Shaft ends, balancing, vibrations, noise level and coupling ....................................................................................... 14
2.6 Mounting arrangements .................................................................................................................................................... 14
2.7 Belt drive ................................................................................................................................................................................ 15
2.8 Terminal boxes ..................................................................................................................................................................... 15

3 Electrical characteristics 17
3.1 Conditions for rated operation..........................................................................................................................................17
3.2 Tolerances ..............................................................................................................................................................................17
3.3 Insulation and heating ........................................................................................................................................................ 18
3.4 Circuitry ................................................................................................................................................................................. 18
3.5 Motor protection.................................................................................................................................................................. 18
3.6 Alternating current motors with cage rotors in operation on the frequency inverter ........................................ 20

4 Technical data 21
4.1 Overview .................................................................................................................................................................................21
4.2 Bearings ................................................................................................................................................................................. 22
4.3 Technical data of standard motors ................................................................................................................................. 25
4.4 Dimensions motors fram size 355–500 (Standard) .................................................................................................... 28

5 Mechanically execution und variants 30

5.1 Standard motors ................................................................................................................................................................ 30
5.2 Variants of terminal boxes ................................................................................................................................................ 32
5.3 Customized motors ............................................................................................................................................................. 35

6 Spare parts 38

Revisions
All technical data, outputs, dimensions and weights, stated in this catalogue, are subject to change without
notice. Illustrations do not purport to show constructional details.
1 General specification
1.1 Standards and regulation

The motors comply with the relevant standards and regulations, especially:

Electrical

IEC-Standard EN-Standard Content

IEC 60034-1 EN 60034-1 Rotating electrical machines – Part 1: Rating and performance
IEC 60034-8 EN 60034-8 Rotating electrical machines – Part 8: Terminal markings and direction
of rotation
IEC 60079-0 EN 60079-0 Explosive atmospheres – Part 0: Equipment - General requirements
IEC 60079-1 EN 60079-1 Explosive atmospheres – Part 1: Equipment protection by flameproof
enclosures “d”
IEC 60079-7 EN 60079-7 Explosive atmospheres – Part 7: Equipment protection by increased
safety “e”
IEC 60079-31 EN 60079-31 Explosive atmospheres – Part 31: Equipment dust ignition protection by
enclosure “t”

Mechanical

IEC-Standard EN-Standard Content

IEC 60072 EN 50347 Dimensions and outputs
IEC 60034-5 EN 60034-5 Rotating electrical machines – Part 5: Degrees of protection provided by
integral design of rotating electrical machines (IP code) – Classification
IEC 60034-6 EN 60034-6 Rotating electrical machines – Part 6: Methods of cooling (IC-Code)
IEC 60034-7 EN 60034-7 Rotating electrical machines – Part 7: Classification of types of
construction, mounting arrangements and terminal box position (IM-
code)
IEC 60034-9 EN 60034-9 Rotating electrical machines – Part 9: Noise limits
IEC 60034-14 EN 60034-14 Rotating electrical machines – Part 14: Mechanical vibration of certain
machines with shaft heights 56 mm and higher – Measurement,
evaluation and limits of vibration severity

1.2 Explosion protection in the hazard zones

Protection classes

The use of electrical machines in areas with explosion hazard is permissible on certain conditions. The machines
must be designed in such a way that the explosion risk is eliminated to the furthest extent possible. An explosion
may occur under the following conditions:
§ there is an explosive atmosphere;
§ there is the risk of a spreading explosion;
§ there are sources of ignition.
The protection classes Ex db and Ex db eb prevent one of the three conditions if gas is present and make an
explosion impossible. The ignition protection class Ex tb prevents one of the three conditions if combustible dust
is present.
The protection class for gas, Ex db eb, represents a combination of:
§ flameproof enclosure “d” for the motor housing;
§ increased safety “e” for the terminal box.

Hazardous areas and zones

Hazardous areas are places where an explosive atmosphere may form under certain conditions.

General specification 3
An explosive atmosphere consists of a mixture of air and gasses, steams, mists and flammable dusts, in which a
fire spreads quickly upon ignition under normal air pressure (explosion).
The user is obligated to apply the classification of the hazardous areas under own responsibility and in
accordance with the European Directive 1999/92/EC.
The international standards EN / IEC 60079-10-1 and 60079-10-2 provide the criteria for the classification of the
hazardous areas based on the chemical properties, physical properties, and the quantity of materials used, as
well as in dependence on the frequency and duration in time when an explosive mixture may form.

Zones with explosive gas atmosphere

If the hazard is due to the presence of gas, steams or mists of flammable materials, the European Directive
1999/92/EC provides for a classification into the following three areas:
Zone 0 − areas in which an explosive atmosphere is present permanently or for long periods. In this area, the
installation of electrical machines requires double protection.
Zone 1 − areas in which it is likely that an explosive atmosphere can form under normal conditions. In this zone,
explosion-protected electrical motors with flameproof enclosure, overpressure enclosure, or such with increased
safety may be installed if a certificate from an accredited institution in accordance with the ATEX Guideline is
provided.
Zone 2 − areas in which an explosive atmosphere can form only in very rare cases and can remain there only for a
short period. In this zone, increased safety (non-sparking) motors may also be set up besides motors with
flameproof or overpressure enclosure. The certificate from a notified body is not required.

Zones with combustible dust formation

If the hazard is due to the presence of combustible dust or combustible flyings, the European Directive
1999/92/EC provides for a classification into the following three zones:
Zone 20 − areas in which an explosive atmosphere is present permanently or for long periods. There are no motors
installed in this zone.
Zone 21 − areas in which it is likely that an explosive atmosphere can form under normal conditions. In this zone,
electrical motors may be installed if a certificate from an accredited institution in accordance with the ATEX
Guideline is provided and if they are installed with protection class IP6x.
Zone 22 − areas in which an explosive atmosphere can form only in very rare cases and can remain there only for a
short period. Depending on the kind of dust, protection class IP6x may also be required in Zone 22. The certificate
from an accredited institution is not required.

Classification of hazard zones

Area of use with presence of Area of use with presence of Hazard class of the setup
GAS COMBUSTIBLE DUSTS zone
Zone 0 Zone 20 Explosive atmosphere is
present permanently
Zone 1 Zone 21 Explosive atmosphere is
probably present
Zone 2 Zone 22 Explosive atmosphere is
unlikely

Classification of equipment according to ATEX

The European ATEX Directive 2014/34/EU classifies equipment into two equipment groups, each with up to three
different device categories, depending on the safety standard reached by the machine.

F Equipment of a higher category can also be installed at the setup sites of equipment in a lower
category, due to the given redundancy.

4 General specification
Equipment category

DEGREE OF Pits Surfaces

PROTECTION Equipment Group I Equipment Group II
ensured by the Equipment Equipment Equipment
equipment categories Categories Categories
Gas Flammable dusts
Very high M1 1G 1D
High M2 2G 2D

Normal Not provided 3G 3D

Group classification of equipment according to EN / IEC 60079-0

The EN / IEC 60034-0 standard classifies the electrical equipment into three groups.
Group I: Electrical equipment intended for installation in workings with hazard of firedamp.
Group II: Electrical equipment intended for areas, other than workings, in which an explosive gas
atmosphere may form.
Group III: Electrical equipment intended for areas, other than workings, in which an explosive dust
atmosphere may form.
The motors and other electrical equipment are labeled with the special symbols of the ignition protection class,
explosion group, temperature class and the equipment protection level.

Equipment for explosive gas atmospheres

Flammable gases and steams are classified into explosion groups and temperature classes, depending on the
ignition temperature and pressure that is created in the event of an explosion.
The housings, components and additional parts of equipment that is intended for the use in gas atmospheres, are
classified into three subgroups, depending on the flammable materials for which they are suited:
§ Group IIA, Group IIB, Group IIC
A motor that is classified for a particular group is also suitable for the lower groups: A motor of Group IIB is also
suitable for Group IIA; a motor of Group IIC is also suitable for Groups IIA and IIB.
Temperature classes are defined for the different ignition temperatures of gasses, steams and mists, from which
the use and labeling is derived.

Temperature classes

Ignition temperature of Temperature class Maximum surface

the explosive mixture temperature of the
electrical equipment
[°C] [°C]
above 450 T1 450
from 300 to 450 T2 300
from 200 to 300 T3 200
from 135 to 200 T4 135
from 100 to 135 T5 100
from 85 to 100 T6 85

General specification 5
Klassifizierung der am häufigsten vorkommenden brennbaren Stoffe, unterteilt nach Explosionsgruppe und
Temperaturklasse

Group Temperature class

T1 T2 T3 T4 T5 T6

I Methane
(firedamp)
IIA Ammonia Amyl alcohol Decane Ether
Ethane Ethyl alcohol Diesel fuel Acetaldehyde
Ethyl acetate Butyl acetate Crude oil*
Acetone Natural gas Heptane
Benzol Acetic acid Hexane
Butanone anhydride Kerosene
Methylene Liquid gas Naphtha
chlorine Isobutyl alcohol Pentane
Chloroethylene Monoamine acetate Cyclohexane
Acetic acid N-butyl alcohol Cyclohexene
Carbon Propyl acetate
monoxide Cyclohexane
Methane
Methanol
Methyl alcohol
Methyl acetate
Naphthalene
Propane
Toluene
Xylene
IIB Coke gas 1.3-butadien Crude oil* Ethyl ether
Water gas Ethylene Isoprene
Ethyl benzene Hydrogen
Ethylene oxide sulphide
IIC Hydrogen Acetylene Ethyl nitrate
Carbon
disulphide
* in the function of the chemical composition

The data listed in the table serve merely as examples.

F The equipment manufacturer is not responsible for the classification of the materials. The user is
responsible for selecting the equipment (see EN / IEC 60079-14).

Equipment for explosive dust atmospheres

The housing of the devices with ignition protection class “t”, which are intended for the use in atmospheres with
explosive dust, are classified into three subgroups depending on the kind of dust:
§ IIIA: combustible flyings
§ IIIB: non-conductive dust
§ IIIC: conductive dust

F Group IIIC also requires at least protection class IP6x even if it is set up in Zone 22.

6 General specification
Temperature for environments with flammable dust

To protect against flammable dusts, the ignition temperature of the dusts must be considered both in the form
of a dust cloud as well as in the form of a dust layer.
The surface temperature of the enclosure specified on the motor type plate must be lower than the reference
ignition temperature.
The reference temperature is the lower value of the two values calculated according to the following method:
§ TS1 = ⅔· Tcl (Tcl = ignition temperature of the dust cloud)
§ TS2 = T5mm − 75 K (T5mm = ignition temperature of a dust layer of 5 mm).
§ Tamm = the lower value of TS1 and TS2.
The surface temperatures are not specified in temperature classes as is the case for explosive gases, but directly
in degrees Celsius. The manufacturer determines the temperature by means of the thermal characteristics of the
product. The following surface temperatures apply as a standard for HELMKE products:
T150 °C − T135 °C − T125 °C − T100 °C − T85 °C.

Beispiele für Zündtemperaturen von brennbarem Staub

Clouds Layer
[°C] [°C]
Aluminium 590 >450
Coal dust 380 225
Meal 490 340
Wheat dust 510 300
Methyl cellulose 420 320
Phenolic resin 530 >450
Polyethylene 420 Melting point
PVC 700 >450
Soot 810 570
Starch 460 435
Sugar 490 460

The data listed in the table serve merely as examples.

F The equipment manufacturer is not responsible for the classification of the materials. The user is
responsible for the choice of equipment.

Equipment for explosive, hybrid mixtures as a combined mixture of flammable gas or vapour with a combustible
dust or combustible flyings

Exclusively for Group I equipment for mines susceptible to firedamp, the ignition of both mine gases (basically
methane only) and coal dust is considered together. Combined mixtures of flammable gases or vapors with dust
or flyings may form explosive, hybrid mixtures outside their individual limits. Without explicit knowledge of the
mixtures, explosive parameters shall generally be assumed if in each case 25% of the lower explosive limit (LEL)
of the gas / vapor or the minimum explosion concentration (MEC) of the dust is exceeded. For the selection of
the equipment in industrial applications in the case of hybrid mixtures, EN / IEC 60079–14, Annex M, provides
guidance.
Equipment with double marking both for explosive gas atmospheres and for explosive dust atmospheres can be
used in principle. In order to determine the temperature class and surface temperature of the equipment to be
used, an assessment must be made regarding the minimum ignition energy (MIE), the auto-ignition temperature
for gas / vapour and the minimum ignition temperature of a dust cloud. These may be lower than the minimum
of the parameters resulting from any component of the mixture. Compliance with the temperature class for gas
/ vapour with possible dust deposits on the device must also be observed.

General specification 7
Subdivision of the protection levels of a type of protection

Types of protection describe the basic method of protection against explosions or their effects. Different
technical designs and the scope of the tests for a given type of protection result in different residual risks. Taking
into account the zone concept, which describes the probability of an explosion, the various technical designs and
the resulting residual risks are related to each other. There are defined different protection levels for the types of
protection correspondingly. Taking these protection levels into account, no further risk assessment is required for
use in a relevant zone.
The code letter of the type of protection is followed by another letter for the protection level:
§ Type of protection with “very high” protection level has the marking “a”.
§ Type of protection with “high” protection level has the marking “b”;
§ Type of protection with “enhanced” protection level has the marking “c”.
This results in, for example, markings of type of protection “d” in conjunction with the respective level of
protection as “Ex da”, “Ex db” or “Ex dc”.

Equipment Protection Level (EPL)

In accordance with the standard EN / IEC 60079–0, the labelling of equipment that is intended for use in a
potentially explosive atmosphere must also include the additional specification of the Equipment Protection Level
(EPL).
The EPL is defined as the protection level attributed to equipment, which is based on the probability that
equipment can represent a source of ignition.
The EPL labeling furthermore permits distinguishing between different explosive atmospheres.
The first letter distinguishes between the following:
§ M – for mining
§ G – für gas
§ D – for dust
The second letter indicates the probability that equipment can represent a source of ignition:
§ Equipment with “very high” protection level (guarantees safety in normal operations as well as in the case of
predictable or rare errors/malfunctions) has the marking “a”;
§ Equipment with “high” protection level (guarantees safety in normal operations as well as in the case of
predictable errors/malfunctions) has the marking “b”;
§ Equipment with “enhanced” protection level (there is no hazard of ignition during normal operations; the
device has a few additional protection features, which ensure that there is no hazard of ignition in the case of
normally predictable failures) has the marking “c”.

Difference in protection level of a type of protection and equipment protection level (EPL)

The indication of the protection level for a type of protection and the equipment protection level EPL for a
specific equipment must be differentiated and are accordingly independently stated in the Ex marking. The
information is basically not redundant and may differ especially for devices with a combination of types of
protection.
§ The level of protection of a type of protection describes the technical design and testing of the type of
protection of the device.
§ The equipment protection level EPL describes the basic suitability of the equipment for use in a zone.

Choice of the electrical explosion-protection

The combination of hazard zones and the equipment categories to be used is defined by Directive 1999/92/EC.
Notes on this topic are also provided in EN / IEC 60079-14.
The special construction standards including the level of protection for the type of protection (e. g. Ex db) also
determine the motor category (e. g. 2 G) that is permissible for their use.

8 General specification
Examples for the choice of protection class for the ZONES with GAS atmosphere

Explosive Hazard zone Protection Equipment Type of EPL

atmosphere ensured by category protection
the
equipment
ALWAYS PRESENT 0 Very high 1G See also Ga
EN / IEC
60079-26
PROBABLE 1 High 2G Ex db Gb
Ex db eb
Ex eb
Ex pxb
NOT PROBABLE 2 Enhanced 3G Ex ec Gc
(Ex nA)

Examples for the choice of protection class for ZONES with COMBUSTIBLE DUST atmosphere

Explosive Hazard zone Protection Equipment Type of EPL

atmosphere ensured by category protection
the
equipment
ALWAYS PRESENT 20 Very high 1D Ex ta Da
PROBABLE 21 High 2D Ex tb Db

NOT PROBABLE 22 Enhanced 3D Ex tc IIIC Dc

Conductive dust
NOT PROBABLE 22 Enhanced 3D Ex tc IIIB Dc
Non-conductive Ex tc IIIA
dust or fibrous
material
Comment: Machines of a higher equipment category can also be installed at the setup places of machines in a
lower equipment category.

1.3 Produktpalette der Motoren

The motors described in this catalogue fulfil the requirements in accordance with the European Directive
2014/34/EC dated 26.2.2014 (ATEX Directive) regarding machines and protection equipment for the use in safe
areas or in areas with a potential explosion hazard.

F The user is responsible for the classification of the areas.

Temperature class

Frame size T3 T5 T6
355−500 Same output as T4 Reduced output Reduced output
compared to T4 compared to T4

Basic characteristics

§ Explosion-proof motors, which are protected against explosion according to the standards EN / IEC 60079-0,
60079-1, 60079-7 for gaseous environments. Asynchronous alternating current motors with cage rotors.
§ Asynchronous alternating current motors with cage rotors.
§ Completely enclosed, self-ventilated, housing IP55 with terminal box IP65.
§ The motors are air-cooled with external ventilation (standard EN / IEC 60034-6, Method IC411).
§ Axial or radial fan wheel dependend or independent of rotation direction.

General specification 9
§ Dimensions according to the standards EN 50347 / IEC 60072.
§ Power supply 6000 V / 50 Hz as standard. Alternating current motors, one rotation speed, 2-4-6 poles, T4 for
design sizes from 355 mm to 500 mm, power supply with multi-range voltage and frequency upon by
customer’s request.
§ Insulation class F.
§ Maximum sound pressure level 86 dB(A).
§ Terminal box:
- available both as flame proof “d” and increased safety “e” constructions,
- in enlarged design,
- pivotable by 90° in 4 positions.
§ Motor housing and terminal boxes are separated by design to avoid the spreading of explosions.
§ Type plate made of stainless steel, corrosion protected screws.
§ Strong impact resistance:
- motor housing, terminal boxes and bearing shields are steel welded constructions.
- ventilator and ventilator hub made of steel sheet.
§ The declaration of conformity is also available for special product characteristics that are different from the
basic version, such as:
- operation above 1000 m absolute altitude,
- different voltages and frequencies,
- supply through frequency inverter,
- built-in temperature sensors in the motor,
- operating modes from S1 to S9.

Electrical design variants

§ Special voltages and frequencies (max. voltage 6600 V).

§ Motors for tropical climatic zones.
§ Motors for low ambient temperatures (-50 °C).
§ Stator winding over temperature below 80 K.
§ Motors of insulation class F.
§ Motors with bi-metal contacts, PTC-thermistors or PT100 temperature sensors.
§ Motors with stationary heating.
§ Motors with electrical characteristics according to customer specifications.

Mechanical design variants

§ Special flanges and shafts.

§ Second shaft end (NDE).
§ Terminal box with cable glands.
§ Terminal box with special wire inlets.
§ Motors without terminal box available with mountings for steel tubes for cable routing.
§ Motors with protection class IP56 – IP65 – IP66.
§ Motors with drainage valves for condensation water.
§ Motors with special bearings.
§ Vibration level of classes A or B, according to EN / IEC 60034-14.
§ Motors with rain or sunroof, water protection panel.
§ Slanted terminal box for increased safety “e” constructions
§ Separate terminal box for separated auxiliary terminals or additional accessory terminals.
§ Model with low sound emission.
§ Higher corrosion protection for tropical climate or applications in marine environments:
- exterior paint of mechanical components with epoxy varnish,
- protection of interior component (coil and rotor) with protective paint,
- rust-proof screws.

10 General specification
Accessories

§ Motors for supply with electronic frequency inverter.

§ Motors with encoder.
§ Motors with external ventilation.

General specification 11
2 Mechanical characteristics
2.1 Setup conditions

The motors can be installed in clear and dusty, moist or chemically aggressive rooms (industry) with
temperatures from −20 °C bis +40 °C.

F It is required to specify the respective setup conditions in the order.

Protection degrees

First numeral: Second numeral:

Protection against contact and ingress of foreign Protection against ingress of water
bodies

IP Description IP Description
0 No special protection 0 No special protection
1 Protection against solid foreign bodies larger 1 Protection against vertically falling water drops
than 50 mm (Example: inadvertent contact (condensation)
with the hand)
2 Protection against solid foreign bodies larger 2 Protection against dropping water when
than 12 mm (Example: inadvertent contact inclined by up to 15°
with the fingers)
3 Protection against solid foreign bodies larger 3 Protection against spray water up to 60° from
than 2.5 mm (Example: Wires, tools) vertical
4 Protection against solid foreign bodies larger 4 Protection against shower water from any
than 1 mm (Example: Wires, bands) direction
5 Protection against dust (harmful deposits of 5 Protection against water projected by a nozzle
dust) and from any direction
6 Total protection against dust 6 Protection against heavy seas or water
(is not described for electrical machines projected in powerful jets
according EN / IEC 60034-5)
7 Protection when submerged between 0,15 and
1m
8 Protection when continuously submerged in
water at conditions agreed between the
manufacturer and the user

2.2 Model for lowest temperatures with stationary heating

Motors that are to be installed in regions with extremely low temperatures must be ordered separately.
The certificates on the explosion safety apply to temperatures up to -50 °C.
The motors equipped with heating elements (electrical resistor heating) maintain a minimum temperature
of -20 °C when the motor is at a standstill (see table).

F During the operation of the motor, the heating elements must be switched off.

The standard voltage is 230 V ± 10 %.

12 Mechanical characteristics
Stationary heating

Frame size For the prevention of For use in environments

condensation water with the temperatures
below -20 °C (up
to -50 °C)
Heating element Heating element
Minimum required power Minimum required power
[W] [W]
355M 200 400
355L 235 470
400M 250 500
400L 300 600
450 300 600
450L 350 700
500 385 770
500L 400 800

2.3 Material

Frame size 355–500

Motor housing, bearing Steel
shield, terminal box
Ventilator hood, rain Steel
protection roof
Fan wheel Steel
Shaft Steel C45
Rotor r Copper cage
Coil Insulation class F
Screws, motor housing, Steel 8.8 galvanized or
bearing shield, terminal A4-80, EN ISO 3506-1
box

2.4 Paint

Frame size 355–500

Paint priming Components are sand-blasted, clean and free from
grease, treated with rust-protection primer
Layer thickness, colour Top coat with enamel paint, overall 120 µm (other
thicknesses on request)
RAL 7030 (special colours on request)
Mechanical resistance Abrasion-resistant, elastic, scratch and impact-
resistant
Corrosion resistance Excellent resistance against water, water steam and
saline liquids
Chemical resistance, Good resistance in chemically aggressive environment
measurement conditions

Mechanical characteristics 13
2.5 Shaft ends, balancing, vibrations, noise level and coupling

Shaft ends

The shaft ends are cylinder-shaped and comply with the standards EN 50347 / IEC 60072. As a standard, they
are provided with a parallel key and a threaded hole on the front side for the mounting of belt pulleys and
couplings.
The parallel keys are included in the delivery of the motor. On request, motors with second shaft ends and/or
special shaft end are also available.
For motors with switchable poles, with 2/4, 2/6, 2/8 and 2/12 poles, the shaft has the same dimensions as for 2-
pole motors.

Balancing, vibrations

The rotors are dynamically balanced with a parallel key according to 1SO 8821.
The vibration values are within the limits prescribed by the standards EN / IEC 60034-14, Level “A” (N).
For special requirements, motors with a vibration level of “B” (R) (reduced) are available.
It must be ensured before assembly that the transmission elements, such as belt pulleys and couplings have been
dynamically balanced with half key.

Noise level

The noise level values comply with the standards EN / IEC 60034-9. The nominal data include the sound pressure
values “Lp” in dB(A) for each motor type.
These values apply to motors in idle run with a frequency of 50 Hz and a tolerance of +3 dB(A). For motors with
60 Hz, the sound pressure values are approx. 4 dB(A) higher than at 50 Hz.

Direct coupling

For a direct coupling of the motor with the driven machine, the shaft axes have to be aligned properly in order to
avoid damages or seizing up of the bearings.
The connection with a lamellar coupling or similar coupling types is permissible for all motors but in that case, as
well, the axes have to be aligned properly. Special care is required in the assembly of 2-pole motors.

Belt drive

In order to simplify assembly and the adjustment of the belt tension, assembly slides are commonly used on
which the motor is mounted.
It has to be checked if the maximum radial stress generated by the belt tension is less than the maximum
permissible force specified in the motor data. Belt pulleys and couplings may only be mounted and removed with
the tools provided for this purpose.

2.6 Mounting arrangements

Mounting arrangements for rotating electrical machines are designated according to IEC 60034-7, Code I (in
brackets Code II).
Our motors are available according to the table depending on design and frame size.

14 Mechanical characteristics
 IM B3 (IM 1001) IM V5 (IM 1011) IM V6 (IM 1031)

IM B5 (IM 3001) IM V1 (IM 3011) IM V3 (IM 3031)

IM B35 (IM 2001) IM V15 (IM 2011) IM V36 (IM 2031)

F The required model has to be specified in the order, as the design will be adjusted in part to the
installation position.

2.7 Belt drive

The data refer only to the normal shaft end at the drive end of IM B3 motors with one speed.
Calculation of radial shaft 19120 · P · k FR = radial shaft load in N
FR = [N]
load: D1 · n P = power in kW
n = speed in min-1
D1 = pulley diameter in m
k = belt tension factor

The belt tension factor depends on the type of belt and is assumed to be approximately:
3...4 for normal flat belt without idle pulley
2...2,5 for normal flat belt with idle pulley
2,2...2,5 for V-belt
Please enquire exact data from the belt manufacturer.

2.8 Terminal boxes

Our series offers the following models:

§ Ex db eb IIC Gb
§ Ex db IIC Gb
§ Ex db eb IIB Gb
§ Ex db IIB Gb
§ Ex tb IIIC Db
Available on request:
§ Motors with additional terminal box for auxiliary cables
§ Motors with additional terminal box for auxiliary cables

Mechanical characteristics 15
Position of the terminal box and the terminal

The terminal boxes are arranged in the upper area of the housing, the position of the cable inlets can be turned
by 90° in four positions.
On horizontally mounted motors, the cable inlets are normally arranged on the right side (viewed from the drive
side).

Terminals and protective conductor connection

In the terminal box, maximally 3 power terminals can be arranged. The number of permissible accessory parts
depends on the number of the terminals required for the motor and on whether an additional terminal box is
provided.
Two additional terminals are required for PTC thermistors. Also, the connection of a stationary heating system
requires two terminals.
For PT100 (RTD), 3 or 4 terminals are necessary depending on the chosen type.
The terminal box also contains one protective conductor terminal.
An additional protective conductor terminal is arranged on the motor housing.

Cable inlet thread

The motors are delivered in the series standard with one or two cable inlets that are suitable for explosion-
protected cable glands.
For Ex db eb motors, also cable glands certified for the protection class Ex eb can be used.
The motors equipped with temperature sensors or stationary heating have an additional cable inlet for the
connection of these accessory parts.

Cable inlet thread

Frame size Cable inlet thread

Ex db Ex eb
355…500 1(2) x M63 x 1.5 1 x M75 x 1.5

16 Mechanical characteristics
3 Electrical characteristics
3.1 Conditions for rated operation

Power

The output of the other rated characteristics specified in this catalogue refers to the following conditions
according to the standard EN / IEC 60034-1:

§ Continuous operation (S1)

§ Frequency 50 Hz
§ Voltage 6000 V (Standard)
§ Ambient temperature of 40 °C
§ Altitude of setup site max. 1000 m absolute
The motors can also be operated in an enhanced ambient temperature of up to 80 °C and be set up in absolute
altitudes of up to 4000 m. In this case, the output will reduce as shown in the table. Alternatively, a bigger motor
might be required.

If the full rated output is required as per the selection tables, Thermal Altitude of setup site
the coolant temperature has to be reduced according to the table class
2000 m 3000 m 4000 m
shown on the side.
B 32 °C 24 °C 16 °C
F 30 °C 19 °C 9 °C
H 28 °C 15 °C 3 °C

Voltage, frequency

As a standard, the motors are designed for operation with the rated voltages and frequencies, as well as the
tolerances given in the standard EN / IEC 60034-1. The motors may be operated with the tolerances provided for
the normal area of use (Zone A: voltage ±5 %, frequency ±2 %).

Rated torque

The motors have a squirrel-cage rotor that is suitable for the direct start-up. The values of the starting torque
and tilting moment can be found in the tables of the operating data.
Rated power [kW]
Rated torque [Nm] = 9550 ·
Rated speed [min-1]

Rotation speed

The rotation speeds specified in the data tables refer to 50 Hz and correspond to the synchronous rotation speed
less slippage.

Rotation direction

Most of the motors can be operated in both rotation directions. Motors for one rotation direction are typical at
bigger motor sizes, higher rotation speed and specific demands regarding noise level. Please clarify at order and
see individual technical data.
If the phases in sequences L1, L2, L3 are connected to terminals U1, V1, W1, the motor will rotate clockwise when
looking at the shaft end.
If admissible, the rotation direction can be reversed by reversing two optional phases.

3.2 Tolerances

In consideration of the manufacturing tolerances and material deviations in the used raw materials, the
tolerances for industrial motors according to EN / IEC 60034-1 are permitted for the assured values. The
following notes in this regard are included in the standard:

Electrical characteristics 17
§ An assurance of all or any of the values according to the table is not mandatorily required. Assured values to
which permissible deviations are to apply must be expressly stated in the offers. The permissible deviations
have to match the table.
§ If there is a permissible deviation only in one direction, the value in the other direction is not limited.

Values for Tolerannce

Efficiency class(η) −0.15 · (1 − η) for PN ≤ 50 kW
(for indirect assessment) −0.10 · (1 − η) for PN > 50 kW
Power factor (cos ϕ) −⅙ · (1 – cos ϕ), at least 0.02, at most 0.07
Slippage (s) (for rated load in condition at ±20 % of the assured slippage for PN ≥ 1 kW
operating temperature) ±30 % of the assured slippage for PN < 1 kW
Locked rotor current (IA) +20 % of the assured locked rotor current
(in the intended start switching) without bottom limitation
Locked rotor torque (TA) −15 % and +25 % of the assured locked rotor torque
(+25 % may be exceeded upon agreement)
Pull-up torque (TS) −15 % of the assured value
Tilting moment (TB) −10 % of the assured value
(after application of this tolerance, TB/TN is at least 1.6)
Inertia moment (J) ±10 % of the assured value

3.3 Insulation and heating

The insulation of the motors corresponds to thermal classes F according to EN / IEC 60034-1:
§ mica isolated copper wire
§ additional insulation materials on polyester or glass fiber basis
§ Vacuum pressure impregnation (VPI) with resin

The table shown on the side specifies the heating (∆T*) and maximum Class ∆T Tmax
temperatures the hottest points of the coil (Tmax) according to the heat classes
B 80 K 130° C
of the standard EN / IEC 60034–1.
F 105 K 155° C
H 125 K 180° C

3.4 Circuitry

Star circuit The stator windings star point is internally connected.

Phase current and voltage are: Iph = IN; Vph = VN / 3
where IN is the rated current and VN is the rated mains voltage.

3.5 Motor protection

The selection of the thermal motor protection should result from the existing operating conditions. Motors may
be protected by means of current-dependent motor circuit breakers or overcurrent relays and temperature
sensors.
Motor protection is possible as follows:
§ Motor circuit breaker with overcurrent-time-trip
§ Thermistor protection with thermistor temperature sensors (PTC) in the stator winding combined with relay
(if required, with additional motor circuit breaker).
§ Resistance thermometer for monitoring of winding and bearing temperature (PT100).
§ Bimetal temperature sensor as N.C. or N.O. in the stator winding (if required, with additional motor circuit
breaker).

18 Electrical characteristics
 Mode of functioning of the bi-metal temperature sensors Mode of functioning of the resistor
temperature sensors (PTC type)
Ti Switching temperature Ti Switching temperature
Tr Reset temperature
Type N/O Typ N/C
(normally open) (normally closed)

Circuitry examples

Protection measure Protection against...

§ Overload in continuous operation

Motor circuit breaker with thermal and § Blocked rotor
electromagnetic overcurrent trip § Not for use with frequency converter
according to EN / IEC 60079-14

In operation, protection against:

§ Overload in continuous operation
§ Long start-up and braking processes
§ High switching frequency
Protection with overcurrent relay
In case of failure, protection against:
Thermistor protection and fuse
§ Obstruction of the cooling
§ Increased coolant temperature
§ One-phase ru
§ Frequency fluctuations
§ Blocked rotor
In operation, protection against:
§ Overload in continuous operation
§ Long start-up and braking processes
§ High switching frequency
Resistor temperature sensor with trigger
In case of failure, protection against:
device
§ Obstruction of the cooling
§ Increased coolant temperature
§ One-phase ru
§ Frequency fluctuations
§ Blocked rotor

F EN / IEC 60079-14 must be observed.

Electrical characteristics 19
3.6 Alternating current motors with cage rotors in operation on the frequency inverter

The motors built specifically for this purpose, with ignition protection classes “db” or “db eb”, can also be
operated in classified areas with supply from an electronic frequency inverter. EN / IEC 60079-14 must be
observed.
If Ex db, Ex db eb or Ex tb motors with frequency inverters are used, the following factors must also be
considered in addition to the common selection criteria:
§ Motors operated with frequency inverters do not have a pure sine-wave voltage (or current). This fact leads to
rising dissipations, vibrations and noise level of the motor.
§ When using frequency inverters, the rotation speed of the motors can differ significantly from the rated
rotation speed shown on the type plate. Rotation speeds exceeding the value shown on the type plate must be
reconcilable with the motor and the motor-load-machine proposition.
§ The operating duration with a rotation speed higher than 3600 min-1 must not be above 10 % of the total
work cycle of the motor in order to assure an appropriate lifetime.
§ Maximum initial inverter voltage 6000 V with peak voltages of Û ≤ 12,2 kV und d/dt ≤ 1 µs-1. For higher initial
inverter voltages or loads, a special insulation is required.
§ The motors non-drive bearing is insulated against shaft currents.
§ Use an approved and functionally tested temperature monitoring device which disconnects the motor from
the electrical supply in case of over-temperature.

2-pole motors – Torque limits for frequency inverter operation

IC411: self ventilated; IC416: forced ventilated
Curve A: field weakening from a frequency of 50 Hz
Curve B: no field weakening up to a frequency of 87 Hz
(motor in 6000 V/ 3 ∆: 50 Hz at 3464 V; 87 Hz at 6000 V)
Frame size 355 Frame size 400, 450, 500

120% 120%
M/M n M/M n
B
100% 100%
IC416 IC416 B
A A
80% 80%

IC411 IC411
60% 60%

40% 40%
0 10 20 30 40 50 60 70 80 f /Hz 90 0 10 20 30 40 50 60 70 80 f /Hz 90

4- and 6-pole motors – Torque limits for frequency inverter operation

IC411: self ventilated; IC416: forced ventilated
Curve A: field weakening from a frequency of 50 Hz
Curve B: no field weakening up to a frequency of 87 Hz
(motor in 6000 V/ 3 ∆: 50 Hz at 3464 V; 87 Hz at 6000 V)
Frame size 355 Frame size 400, 450, 500

120% 120%
M/M n M/M n

100% 100%
IC416 B IC416 B

80% 80%
A
IC411 IC411 A
60% 60%

40% 40%
0 10 20 30 40 50 60 70 80 f /Hz 90 0 10 20 30 40 50 60 70 80 f /Hz 90

20 Electrical characteristics
Pos: 9.2 /Kataloge/Allgemeines/04 Technische Daten/04.00 Überschrift @ 1\mod_1539944816430_28.docx @ 22164 @ 1 @ 1

4 Technical data
4.1 Overview

The technical data specified in the following apply to the models with Ex db IIC/IIB and Ex db eb IIC/IIB and
Ex tb IIIC.

Frame Rated power [kW]

Type *
size 2-pole 4-pole 6-pole
DDOR355M 355 160 160 -
DDOR355M 355 200 200 -
DDOR355M 355 250 250 200
DDOR355L 355 315 315 250
DDOR355L 355 355 355 315
DDOR400M 400 400 400 -
DDOR400M 400 - 450 -
DDOR400L 400 450 500 355
DDOR400L 400 500 560 400
DDOR400L 400 - - 450
DDOR450M 450 560 - -
DDOR450L 450 630 630 500
DDOR450L 450 710 710 560
DDOR450L 450 - 800 630
DDOR500M 500 - 900 710
DDOR500M 500 800 1000 800
DDOR500L 500 900 1250 900
DDOR500L 500 1000 - 1000

* The type designations change depending on the ignition protection class as follows:
§ Ex db eb IIC Gb: CDEDOR
§ Ex db eb IIB Gb: BDEDOR
§ Ex db IIC Gb: CDDOR
§ Ex db IIB Gb: BDDOR
§ Ex tb IIIC Db : BSDOR

Technical data 21
4.2 Bearings

Normalausführung der Lager

Bearing attribution (standard design) Frame Number Drive side Non-drive side
Grooved ball bearing and cylindrical size of poles
roller bearings according to ISO 15 355 2 (hor.) 6316 C3 6316 C3
(DIN 625).
2 (vert.) 6316 C3 7216 BM
355 4,6 (hor.) 6322 C3 6316 C3
4,6 (vert.) 6322 C3 7216 BM
400 2 (hor.) 6317 C3 6317 C3
2 (vert.) 6217 C3 7217 BM
400 4,6 (hor.) 6324 C3 6319 C3
4,6 (vert.) 6324 C3 7219 BM
450 2 (hor.) 6217 C3 + NU 217 C3 NU217 C3
2 (vert.) 6217 C3 7320 BM
450 4,6 (hor.) 6226 C3 + NU 324 C3 NU324 C3
4,6 (vert.) 6324 C3 7320 BM
500 2 (hor.) 6219 C3 + NU 219 C3 NU 219 C3
2 (vert.) 6219 C3 7322 BM
500 4 (hor.) 6228 C3 + NU 326 C3 NU 326 C3
4 (vert.) 6226 C3 7322 BM
500 6 (hor.) 6230 C3 + NU 328 C3 NU 328 C3
6 (vert.) 6228 C3 7322 BM

(other arrangements on request) Frame Bearing Bearing on non- Spring element

size Drive side drive side

355...500 Fixed bearing Floating Non-drive side

bearing (hor.)
Drive side(vert.)

F The motor’s non-drive side bearing is insulated against shaft currents.

Maximum permissible axial forces without additional radial forces

The values apply to 50 Hz and to minimum 50,000 hours assumed bearing life. For operation with 60 Hz, the
values must be reduced by 10% (with effect from additional radial forces, a query is required depending on the
direction of force).

22 Technical data
Horizontal shaft

Frame Permissible axial forces (pressure or

size pull) [N]
Grooved ball bearing
3000 min-1 1500 min-1 1000 min-1
355 4036 5650 7520
400 4973 8103 9767
450 7063 11575 13673
500 8842 16580 18365

Vertical shaft downward or upward

Frame Permissible axial forces (pressure or pull) [N]

size
Angular contact ball bearings Deep groove ball bearings (upward)
(downward)
3000 min -1 1500 min-1 1000 min-1 3000 min -1 1500 min-1 1000 min-1
355 4250 5312 5666 2825 3955 5264
355 4250 5312 5666 2825 3955 5264
400 4825 7750 8266 3481 5673 6836
450 10150 12687 13533 5504 8102 9571

Permissible radial forces

The values apply to 50 Hz and to minimum 50,000 hours assumed bearing life. For operation with 60 Hz, the
values must be reduced by 6 %.
If the radial force is applied between points X0 and X2, the permissible force FR can be calculated from the
following formula: FR = FX0 –X/E (FX0 – FX2), where E = length of shaft extension in basic version.

Frame Force Permissible radial forces [N]

size impact
Grooved ball bearing Cylinder roller bearing
point
3000 min-1 1500 min-1 1000 min-1 3000 min-1 1500 min-1 1000 min-1
355 X0 2830 8830 9490 – – –
X2 1306 3210 3452 – – –
400 X0 2530 8140 8580 – – –
X2 1046 2960 3118 – – –
450 X0 – – – 2940 6420 6870
X2 – – – 1216 2334 2497
500 X0 – – – 4170 36000 42750
X2 – – – 1725 13109 15545

Technical data 23
4.3 Technical data of standard motors

Rating data for mains operation Direct online start

Type Frame Rated Rated Rated Efficiency Power Starting Starting Break- Rotor Weight
size power speed torque EN60034-2-1:2014 factor current torque down inertia
torque
PN nN TN η [%] cos ϕ IS /IN TS /TN TB /TN J
[kW] [min ]
-1
[Nm] 100 % 75 % 50 % [kgm 2] [kg]

Helmke flameproof
Pos: 9.16 /Kataloge/Allgemeines/04 Technische Daten/04.03.d1 Tabelle 2polig Überschrift @ 1\mod_1540312696669_28.docx @ 22297 @ @ 1

3000 min-1 (2-pole)

DDOR355M-02 355 160 2980 513 96.5 95.4 94.5 0.88 6.0 0.7 2.3 2.7 2250
DDOR355M-02 355 200 2980 642 95.7 95.6 95 0.88 5.5 0.7 2.0 3.0 2350
DDOR355M-02 355 250 2982 801 96.1 96.0 95.2 0.88 6.0 0.7 2.3 3.5 2500
DDOR355L-02 355 315 2980 1011 96.5 96.4 96.0 0.89 6.0 0.8 2.2 4.3 2850
DDOR355L-02 355 355 2982 1138 96.6 96.5 96.0 0.87 6.0 0.8 2.3 4.5 3000
DDOR400M-02 400 400 2983 1282 96.3 96.2 95.4 0.90 6.0 0.8 2.2 6.0 3300
DDOR400L-02 400 450 2984 1442 96.4 96.3 95.5 0.90 6.5 0.9 2.3 6.5 3450
DDOR400L-02 400 500 2985 1601 96.5 96.4 95.8 0.90 6.5 0.9 2.4 6.5 3650
DDOR450M-02 450 560 2985 1794 97.0 96.8 96.3 0.91 6.0 0.8 2.2 13.0 4650
DDOR450L-02 450 630 2986 2017 97.1 96.9 96.5 0.92 6.5 0.8 2.2 14.3 5000
DDOR450L-02 450 710 2986 2273 97.1 97.0 96.6 0.92 6.5 0.9 2.3 16.0 5350
DDOR500M-02 500 800 2983 2564 96.2 96.0 95.0 0.92 6.0 0.8 2.2 34.5 6300
DDOR500L-02 500 900 2982 2885 96.3 96.2 95.5 0.92 6.0 0.8 2.2 39.0 6850
DDOR500L-02 500 1000 2984 3204 96.6 96.4 95.7 0.92 6.5 0.8 2.3 41.0 7100

Technical data 25
 Rating data for mains operation Direct online start
Type Frame Rated Rated Rated Efficiency Power Starting Starting Break- Rotor Weight
size power speed torque EN60034-2-1:2014 factor current torque down inertia
torque
PN nN TN η [%] cos ϕ IS /IN TS /TN TB /TN J
[kW] [min ]
-1
[Nm] 100 % 75 % 50 % [kgm 2] [kg]

Helmke flameproof
Pos: 9.21 /Kataloge/Allgemeines/04 Technische Daten/04.03.d2 Tabelle 4polig Überschrift @ 1\mod_1540313559575_28.docx @ 22307 @ @ 1

1500 min-1 (4-pole)

DDOR355M-04 355 160 1490 1027 94.5 94.0 92.4 0.83 6.5 0.9 2.3 6.3 2200
DDOR355M-04 355 200 1490 1283 94.8 94.3 93.0 0.82 6.5 1.0 2.4 7.3 2370
DDOR355M-04 355 250 1490 1604 95.3 95.0 93.8 0.83 6.5 0.9 2.3 8.8 2650
DDOR355L-04 355 315 1490 2021 95.7 95.5 94.5 0.84 6.5 1.0 2.3 10.0 2870
DDOR355L-04 355 355 1490 2278 95.8 95.7 94.8 0.84 6.5 1.0 2.3 11.0 3150
DDOR400M-04 400 400 1490 2566 96.0 95.8 95.0 0.85 6.2 0.9 2.2 12.5 3350
DDOR400M-04 400 450 1490 2887 96.2 96.0 95.2 0.85 6.5 1.0 2.3 13.5 3570
DDOR400L-04 400 500 1490 3208 96.3 96.1 95.3 0.85 6.8 1.1 2.3 14.5 3750
DDOR400L-04 400 560 1490 3593 96.4 96.2 95.5 0.85 6.8 1.1 2.4 15.5 3970
DDOR450L-04 450 630 1487 4050 96.0 95.8 95.0 0.88 6.5 1.0 2.1 31.0 4750
DDOR450L-04 450 710 1488 4562 96.1 96.0 95.3 0.88 6.7 1.1 2.2 34.0 5100
DDOR450L-04 450 800 1488 5140 96.3 96.2 95.5 0.88 6.8 1.2 2.2 36.0 5370
DDOR500M-04 500 900 1491 5771 96.3 96.2 95.3 0.88 6.3 0.9 2.0 58.0 6400
DDOR500M-04 500 1000 1491 6412 96.5 96.3 95.5 0.89 6.5 0.9 2.0 63.0 6850
DDOR500L-04 500 1250 1491 8015 96.7 96.6 96.0 0.89 6.7 1.0 2.1 69.0 7300

26 Technical data
 Rating data for mains operation Direct online start
Type Frame Rated Rated Rated Efficiency Power Starting Starting Break- Rotor Weight
size power speed torque EN60034-2-1:2014 factor current torque down inertia
torque
PN nN TN η [%] cos ϕ IS /IN TS /TN TB /TN J
[kW] [min ]-1
[Nm] 100 % 75 % 50 % [kgm 2] [kg]

Helmke flameproof
Pos: 9.26 /Kataloge/Allgemeines/04 Technische Daten/04.03.d3 Tabelle 6polig Überschrift @ 1\mod_1540313670409_28.docx @ 22317 @ @ 1

1000 min-1 (6-pole)

DDOR355M-06 355 200 991 1929 94.2 93.7 92.2 0.80 5.5 0.9 2.0 13.5 2800
DDOR355L-06 355 250 991 2412 94.6 94.2 92.8 0.80 5.5 0.9 2.0 16.0 3000
DDOR450-06 450 300 993 2885 93.6 92.6 90.3 0.85 6.51 0.7 2.0 32 4000
DDOR355L-06 355 315 991 3039 95.0 94.6 93.4 0.80 5.5 0.9 2.0 18.0 3300
DDOR400L-06 355 355 992 3421 94.8 94.6 93.3 0.80 5.3 0.8 2.0 26.0 3900
DDOR400L-06 400 400 992 3855 95.0 94.7 93.6 0.80 5.3 0.8 2.0 27.0 4150
DDOR400L-06 400 450 992 4337 95.3 95.0 93.8 0.80 5.5 0.8 2.0 28.5 4320
DDOR400-06 400 500 992 4819 95.2 95.0 93.8 0.85 5.5 0.8 2.0 49.0 5250
DDOR450L-06 450 575 993 5391 95.4 95.1 94.0 0.85 6.0 0.9 2.2 52.0 5470
DDOR450L-06 450 630 993 6065 95.6 95.4 94.4 0.85 5.7 0.8 2.0 55.0 5750
DDOR500M-06 500 630 990 6077 95.0 94.6 93.4 0.85 6. 1 0.87 2.1 9 42.0 600 0
DDOR50ML-06 450 710 994 6829 95.7 95.3 94.1 0.84 6.8 1.0 2.4 103.0 6500
DDOR500M-06 500 710 992 68 35 95.0 94.5 93. 2 0.85 6.0 0.77 2.1 9 69.0 7000
DDOR500M-06 450 800 994 7694 96.0 95.8 94.5 0.85 6.8 1.0 2.4 111.0 6850
DDOR500L-06 500 900 994 8656 96.1 95.8 94.8 0.85 6.8 1.0 2.4 118.5 7200
DDOR500L-06 500 1000 994 9618 96.3 96.0 95.0 0.85 6.8 1.1 2.4 126.5 7550
DDOR500 -06 500 1 100 990 10803 95.5 95.6 92.6 0.85 6.5 0.9 2.2 66 6800
DDOR 560 -06 560 1500 996 - 97.1 97.1 96.8 0.86 6.0 0.7 2.6 158 9300
DDOR 560 -06 560 1700 996 - 97.1 97 96.6 0.87 5.9 0.7 2.5 183 10100

Technical data 27
4.4 Dimensions motors fram size 355–500 (Standard)

Mounting arrangement IM 1001 (B3)

Type Frame No. Dimensions according to IEC [mm]

size of
H A B C AB BB HD AC AD HA K L
pole
s Dimensions according to DIN [mm]
h b a w1 f e m1 g v c s k
Pos: 9.32 /Kataloge/Ex/Ex HS/04 Technische Daten/04.04.c2 Abmessungen 1 Tabelle @ 1\mod_1540315847365_0.docx @ 22408 @ @ 1

DDOR355M-02 355 2 355 610 900 254 700 1250 1400 910 450 30 35 1950
DDOR355L-02 355 2 355 610 1120 254 700 1450 1400 910 450 30 35 2150
DDOR355M-04(6) 355 4-6 355 610 900 254 700 1250 1400 910 450 30 35 1950
DDOR355L-04(6) 355 4-6 355 610 1120 254 700 1450 1400 910 450 30 35 2150
DDOR400M-02 400 2 400 710 1120 280 840 1450 1460 930 450 30 35 2180
DDOR400L-02 400 2 400 710 1250 280 840 1600 1460 930 450 30 35 2330
DDOR400M-04(6) 400 4-6 400 710 1120 280 840 1450 1460 930 450 30 35 2180
DDOR400L-04(6) 400 4-6 400 710 1250 280 840 1600 1460 930 450 30 35 2330
DDOR450M-02 450 2. 450 800 112o 315 950 1450 1560 980 450 40 42 2340
DDOR450L-02 450 2 450 800 1250 315 950 1650 1560 980 450 40 42 2540
DDOR450M-04(6) 450 4-6 450 800 112o 315 950 1450 1560 980 450 40 42 2340
DDOR450L-04(6) 450 4-6 450 800 1250 315 950 1650 1560 980 450 40 42 2540
DDOR500M-02 500 2 500 850 1250 355 1020 1650 1670 1030 450 40 42 2540
DDOR500L-02 500 2 500 850 1400 355 1020 1750 1670 1030 450 40 42 2640
DDOR500M-04(6) 500 4-6 500 850 1250 355 1020 1650 1670 1030 450 40 42 2580
DDOR500L-04(6) 500 4-6 500 850 1400 355 1020 1750 1670 1030 450 40 42 2680
Pos: 9.33 /Standardmodule/--- Seitenumbruch --- @ 0\mod_1334910545750_0.docx @ 357 @ @ 1

28 Technical data
Mounting arrangement IM 1001 (B3)

Typ Frame No. Dimensions according to IEC [mm]

size of
AA D E F GD GA
pole
s Dimensions according to DIN [mm]
n d l u t
Pos: 9.37 /Kataloge/Ex/Ex HS/04 Technische Daten/04.04.c4 Abmessungen 2 Tabelle @ 1\mod_1540316138120_0.docx @ 22428 @ @ 1

DDOR355M-02 355 2 120 70 140 20 12 74.5

DDOR355L-02 355 2 120 70 140 20 12 74.5
DDOR355M-04(6) 355 4-6 120 100 210 28 16 106
DDOR355L-04(6) 355 4-6 120 100 210 28 16 106
DDOR400M-02 400 2 150 80 170 22 14 85
DDOR400L-02 400 2 150 80 170 22 14 85
DDOR400M-04(6) 400 4-6 150 110 210 28 16 116
DDOR400L-04(6) 400 4-6 150 110 210 28 16 116
DDOR450M-02 450 2 225 80 170 22 14 85
DDOR450L-02 450 2 225 80 170 22 14 85
DDOR450M-04(6) 450 4-6 225 110 210 28 16 116
DDOR450L-04(6) 450 4-6 225 110 210 28 16 116
DDOR500M-02 500 2 225 90 170 25 14 95
DDOR500L-02 500 2 225 90 170 25 14 95
DDOR500M-04 500 4 225 120 210 28 16 127
DDOR500L-04 500 4 225 120 210 28 16 127
DDOR500M-06 500 6 225 130 250 32 18 137
DDOR500L-06 500 6 225 130 250 32 18 137
Pos: 10 /Standardmodule/--- Seitenumbruch --- @ 0\mod_1334910545750_0.docx @ 357 @ @ 1

Technical data 29
5 Mechanically execution und variants
5.1 Standard motors

Ex db – IC 411 – cut view and 3D view

30 Mechanically execution und variants

Ex db eb – IC411 – cut view and 3D view

Mechanically execution und variants 31

5.2 Variants of terminal boxes

Main terminal box Ex db – Auxilliary terminal box Ex db

Main terminal box Ex db – Two auxilliary terminal boxes Ex db

32 Mechanically execution und variants

Main terminal box Ex db – Auxilliary terminal box Ex eb

Main terminal box Ex eb – Auxilliary terminal box Ex eb

Mechanically execution und variants 33

Main terminal box Ex eb – Auxilliary terminal box Ex eb

Two main terminal boxes Ex eb – Two auxilliary terminal boxes Ex eb

34 Mechanically execution und variants

5.3 Customized motors

IM B3 – IC 416 – Variant with forced ventilation – Frame size 500

IM B3 – IC 411 – Variant with antifriction bearings and angular Ex db terminal boxes – Frame size 500

Mechanically execution und variants 35

IM B3 – IC 511 – Variant with enhanced power – Frame size 710

IM B3 – IC 511 – Variant with enhanced power and reduced shaft height – Frame size (shaft height) 425

36 Mechanically execution und variants

IM V1 – IC 411 – Variant for vertical application, flange and shaft downwards – Frame size 560

IM V2 – IC 511 – Variant for vertical application, flange downwards, shaft end upwards – Frame size 710

Mechanically execution und variants 37

6 Spare parts
No. Designation No. Designation
1 Motor housing 14 External cover
2 Wounded stator 15 Shaft
3 Terminal box 16 Rotor
4 Terminal box cover 17 Bearing NDE
5 Auxiliary terminal box 18 End shield NDE
6 Auxiliary terminal box cover 19 External ring
7 Space heater terminal box 20 Safety washer
8 Space heater terminal box cover 21 Safety nut
9 Bearing DE 22 External cover
10 End shield DE 23 External fan r
11 External ring 24 Fan hood
12 Safety washer 25 Bearing RTD
13 Safety nut

38 Spare parts
Pos: 16.2 /Kataloge/Allgemeines/99 Notizen/99c Notizen @ 1\mod_1541568965904_0.docx @ 25076 @ @ 1

Notes
Notes
Headquarters Subsidiaries

••Germany ••Pulversheim (Mulhouse), France

••Vaassen, The Netherlands
J. HELMKE & Co. ••Milan, Italy
Ludwig-Erhard-Ring 7– 9 ••San Sebastián, Spain
31157 Sarstedt ••Moscow, Russland
Phone +49 5066 90333-0 ••Singapore, City
Fax +49 5066 90333-291 ••Huai’an, China
info@helmke.de

www.helmke.de