General information

Ex motors in vertical type of construction with shaft extension pointing down must have a protective cover.

Extensive Operating Instructions (Compact) are supplied as standard with explosion-proof motors in English and German. Translations are also available in all the other official EU languages as well as in Russian and Chinese.

For all explosion-proof motors, designs according to UL (order code D31) and CSA (order code D40) are not possible.

Motor connection

For 1MA and 1MJ motors, as well as 1LA/1LG motors in the explosion-proof version (except for 1LA/1LG motors in the version for Zone 22, VIK), certified metric cable glands/sealing plugs are included in the scope of supply.

The certificates for the motors for hazardous areas are stored with the documentation in the selection tool DT Configurator.

Certified motor protection switches/tripping units must always be used for motor protection, see Catalog IC 10.

In the case of SIMOTICS N-compact motors 1LA8 and 1PQ8, monitoring of the bearing temperature is only mandatory for Zone 22 (order code A72).

Zone 1 with type of protection Ex e II increased safety "e"

All 1MA motors in type of protection Ex e II are certified exclusively for mains-fed operation for temperature classes T1 to T3 at an ambient temperature from –20 to +40 °C and have an EC type test certificate according to Directive 94/9/EC (ATEX 95). Higher temperature classes are available on request.
The rated voltage range according to the EC type test certificate is ± 5 %.

Explosion protection is achieved when the certified motor versions interact with a similarly certified motor protection switch. The motor protection switch is selected in accordance with the values certified for the motor for the starting current ratio I_LR/I_rated and the t_E times, so that in the case of a locked rotor fault, the motor is isolated from the supply within the t_E time. The t_E times assigned to the separate temperature classes and the starting current ratio are marked on the rating plate.

Explosion protection can be achieved exclusively by the PTC thermistors embedded in the winding provided that the motor has been specially approved and certified for this. This type of protection is not technically possible for every motor, so it is essential to inquire before ordering.

With the exception of 2-pole motors with frame size 225 M and above, all motors are standard, i.e. at T1/T2 or T3 the motors can be operated with the appropriate rated output. For special versions (different frequency, output, coolant temperature, site altitude, etc.) a new certificate is necessary (please inquire). The temperature class must be specified in the order, otherwise the universal version T1/T2 and T3 will be certified (doubling the certification costs).

• 2-pole 1MA motors of frame size 132 to 160 are equipped as standard with a double rating plate (T1/T2 and T3). If the motors are designed to order codes A11/A12 or voltage code "9", the T3 output will be stamped on the rating plate as standard. Alternatively, the "T1/T2 output" can be stamped on the rating plate –
  Order code C30.

Identification on the rating plate:

Ex II 2G Ex e II T1 – T3

Zone 1 with type of protection Ex de IIC explosion-proof enclosure "d"

All 1MJ motors are designed in the basic version for mains-fed operation. They have the highest explosion group IIC, temperature classes T1 to T4 at ambient temperatures from –20 to +60 °C and have an EC type test certificate according to Directive 94/9/EC (ATEX 95).

These motors are designed such that an explosion within the housing cannot result in an explosion in the environment. The energy that is generated internally by an explosion is dissipated in the so-called "flameproof joints" so far that the energy is no longer sufficient for ignition outside the housing. The housing temperature is below the ignition temperature of the gases to which temperature class T4 applies.

The 1MJ6 motors (frame sizes 71 to 200) generally have a located bearing on the non-drive-end (NDE) of the motor.

The following variations are possible on request:

• Coolant temperature > 40 °C or site altitude > 1000 m (for 1MJ6, the reduction factors listed in Catalog D 81.1 · 2008 Part 0 "Introduction" under "General technical data", "Coolant temperature and site altitude" are applicable).
• Frequency and rated duty
• Pole-changing motors
• Insulated bearing at the non-drive-end (NDE)
• Utilization according to temperature class 155 (F) in mains-fed operation

Identification on the rating plate:

Ex II 2G Ex de IIC T1 – T4

or

Ex II 2G Ex d IIC T1 – T4

• The 1MJ6/1MJ7 motors for use in type of protection Ex d/de (Zone 1)/Ex tD (Zone 21), as well as Zone 22 with electrically conductive dust –
  Order code M76 ¹⁾.

Zone 1/21: Ex II 2G Ex de IIC T4 or Ex II 2G Ex d II C T4
Ex II 2D Ex tD A21 IP65 T 135 °C

For converter-fed operation, see “Converter-fed operation” below.

¹⁾ The explosion-proof motor is not admissible in an explosive atmosphere of gas and dust (hybrid). A standard is not currently available that describes the product requirements for a hybrid mixture.

Type of protection Ex nA for use in Zone 2

• Design for Zone 2 for mains-fed operation (order code M72)
• For design for Zone 2 for converter-fed operation, see “Converter-fed operation in general for Zone 2/21/22”.

1LA/1LG motors are modified for this purpose in the "Non-sparking" design and are suitable for use in hazardous areas of Zone 2 for temperature classes T1 to T3. The maximum surface temperature that can occur during operation must lie below the limit temperature of the respective temperature class. The ventilation system must be in accordance with IEC/EN 60079-0. The motors are equipped with an external grounding terminal. The connection box is similar to the Ex e design.

Please inquire in the case of:

• Utilization according to temperature class 155 (F)
• For pole-changing versions

For motors in the "Non-sparking" version, a conformity statement is available from a recognized testing authority.

Ambient temperature –20 °C to +60 °C, whereby derating applies from 40 °C upwards. Other temperatures are available on request.

The rating plate or the extra rating plate contains the text:

Ex II 3G Ex nA II T3

Number of the "Conformity statement"

Type of protection Ex tD for use in Zone 21 and 22

The distinction between Zone 21 and 22 is as follows:

• Zone 21 according to IEC/EN 61241 ¹⁾
  • Design for Zone 21 ²⁾, as well as Zone 22 for conductive dust (IP65) for mains-fed operation (order code M34)
• Zone 22 according to IEC/EN 61241
  • Design for Zone 22 for non-conductive dust (IP55) for mains-fed operation (order code M35)
• For design for Zone 21/22 for converter-fed operation, see “Converter-fed operation specially for motors in type of protection "Ex tD" (Zone 21/22)”.

The 1LA/1LG motors are modified for this purpose for use in zones subject to dust explosion hazards. The surface temperature is ≤ 125 °C at rated duty.

An external grounding terminal and a metal external fan are fitted to the motors. In the design for Zone 21, the connection box is similar to the Ex e design.

Pole-changing versions are not possible for Zone 21 – they are possible for Zone 22 on request.

Certification:

• Zone 21: EC type test certificate (ATEX), issued by the DMT testing authority (Deutsche Montan-Technologie) and EC declaration of conformity
• Zone 22: EC declaration of conformity

Identification on the rating plate (additional rating plate for SIMOTICS N-compact motors):

• Zone 21: Ex II 2D Ex tD A21 IP65 T125 °C
• Zone 22: Ex II 3D Ex tD A22 IP55 T125 °C

Ambient temperature –20 °C to +60 °C, whereby derating applies from 40 °C upwards. Other temperatures are available on request.

¹⁾ Zone 21 only up to frame size 315 L.

²⁾ Zone 21 includes conductive and non-conductive dust.

Type of protection Ex nA/Ex tD for use in Zone 2/22

The motors must be ordered with:

• Design for Zone 2 and 22 for non-conductive dust (IP55) for mains-fed operation –
  Order code M74
  
  Zone 2/22: Ex II 3D Ex nA II T3 °C
  Ex II 3D Ex tD A22 IP55 T125 °C

Converter-fed operation

General information

All the data listed in the catalog is applicable for a 50 Hz line supply. With converter-fed operation, the torque reduction factors for constant torque and drives for fans, pumps and compressors must be configured using SIZER for Siemens Drives. Higher noise levels must be expected at frequencies other than 50 Hz for motors operating with converters due to the harmonic content of the supply.

The motors are converter compatible for peak voltage durations of t_s > 0.1 μs at U ≤ 500 V in motorized mode (for the 1LA8 motor series, up to 500 V generally).

For converter-fed operation, Ex motors must always be monitored using PTC thermistors. Certified tripping units are required for this purpose, see Catalog IC 10.

For converter-fed operation with frame size 225 and above, it is recommended that an "Insulated bearing cartridge" –
Order code L27 is used.

Type of protection "Explosion-proof enclosure" Ex de IIC T4/Ex d II C T4

The motors must be ordered with:

• Motor protection with PTC thermistors for converter-fed operation with 4 embedded temperature sensors for tripping –
  Order code A15

or

• Motor protection with PTC thermistors for converter-fed operation with 8 embedded temperature sensors for alarm and tripping –
  Order code A16
  
  Zone 1: EX II 2G Ex de IIC T4 or Ex II 2G Ex d II C T4

or

• Design (IP65) for Zone 1 and 21, as well as Zone 22 for conductive dust, for converter-fed operation; with derating –
  Order code M77 (includes order code A15 ¹⁾)
  
  Zone 1/21: Ex II 2G Ex de IIC T4 or Ex II 2G Ex d II C T4
  Ex II 2D Ex tD A21 IP65 T 135 °C

For 1MJ6 and 1MJ7 motor series, there is an additional PTC thermistor in the connection box.

Thermal utilization is according to temperature class 155 (F) in the version with order codes A15, A16 and M77.

The EC type test certificate and factory certificate 2.1 also cover converter-fed operation.

¹⁾ The explosion-proof motor is not admissible in an explosive atmosphere of gas and dust (hybrid). A standard is not currently available that describes the product requirements for a hybrid mixture.

Converter-fed operation in general for Zone 2/21/22

1LA and 1LG motors for Zones 2, 21 and 22 for converter-fed operation have 3 PTC thermistors in the motor winding for tripping as standard. 1LG4/1LG6 motors also have an additional PTC thermistor in the connection box.

Optionally available: PTC thermistors for alarm for converter-fed operation in Zones 2, 21, 22 – Order code A10.

For all motors, "MICROMASTER DUTY S9" is stamped on the rating plate complete with the relevant operating data. (Exception: motor series 1LA8 and 1PQ8).

These rated operating points apply for both constant torque drives and pump/fan/compressor drives. For a constant torque drive, the resulting thermal motor torques in the positioning range must be taken into account.

The operating data for mains-fed operation is specified on the rating plate – on an additional rating plate, according to the selected product, 4 rated operating points are possible in the following variants:

For f_max, see “Mechanical limit speeds n_max at maximum supply frequency f_max“.

Example: Rating plate for mains-fed operation Ex tD, Zone 21

1LA9 186-4WA60-Z

M34

Example: Rating plate for converter-fed operation Ex tD, Zone 21
1LA9 186-4WA90-Z
M38 +L1A+Y68
Plain text Y68: SINAMICS G120

Alternatively, rated operating points for SIMOVERT MASTERDRIVES, SINAMICS G110, SINAMICS G120, SINAMICS S120 or ET 200S FC on the rating plate can be ordered as follows:

Y68 with plain text (C text): SIMOVERT MASTERDRIVES
Y68 with plain text (C text): SINAMICS G110
Y68 with plain text (C text): SINAMICS G120 (for 1LA motors up to FS 225)
Y68 with plain text (C text): ET 200S FC
Y68 with plain text (C text): SINAMICS S120

The converter type and the associated operating data are on the rating plate.

The reasons for stamping the converter type on the motor rating plate are the different control levels for the converter with a converter output frequency of 45 Hz and above and the associated derating of the motor.

For compliance with the admissible temperature class 130 (B), derating is necessary in the case of converter-fed operation in Zones 2, 21 and 22. The derating must be determined from the load data using the configuration tool SIZER for Siemens Drives (see the appendix).

Factory certificates 2.1 for the named converters are stored under "Documentation" in the DT Configurator tool for low-voltage motors.

Only "one" voltage must be assigned to voltage codes/order codes:

¹⁾ Not technically possible for 1LG, FS 315 L.

For all motors, an additional rating plate complete with the operating data for the converter is fitted.

Converter-fed operation specially for motors in type of protection "Ex nA" (Zone 2)

The motors must be ordered with:

• Design for Zone 2 for converter-fed operation, with derating Ex nA II T3 according to IEC/EN 60079-15 –
  Order code M73.

In the version for order code M73, PTC thermistors are included according to temperature class 130 (B).

IEC/EN 60079-15 specifies that the motor and converter must be tested as a unit (individual test). Individual testing has been performed for motors of type of protection "n" operating with the MICROMASTER, SIMOVERT MASTERDRIVES, SINAMICS G110, SINAMICS S120 and SIMATIC ET 200S FC converters (partially for "Non-standard motors of frame size 315 and above"). For details, see factory certificate 2.1. Individual testing can be performed for non-Siemens converters on request; the customer may be required to supply the non-Siemens converter.

Please inquire in the case of a non-Siemens converter (additional charge). The test will cost more in the case of non-Siemens converters (especially on commissioning). Commissioning personnel must be provided by the customer for setting up and operating the non-Siemens converter during the test, if required.

Ex II 3G Ex nA II T3

Converter-fed operation specially for motors in type of protection “Ex tD“ (Zone 21/22)

The motors must be ordered with:

• Design for Zone 21 ¹⁾, as well as Zone 22 for conductive dust (IP65) for converter-fed operation, derating –
  Order code M38
• Design for Zone 22 for non-conductive dust (IP55) for converter- fed operation, derating –
  Order code M39; no derating for SIMOTICS N-compact motors

Zone 21: Ex II 2D Ex tD A21 IP65 T125 °C

Zone 22: Ex II 3D Ex tD A22 IP55 T125 °C

according to IEC/EN 61241

In order codes M38/M39, PTC thermistors are included in accordance with temperature class 130 (B).

The drive system comprising motors protected against dust explosions operating on MICROMASTER, SIMOVERT MASTERDRIVE, SINAMICS G110, SINAMICS S120 and SIMATIC ET 200S FC converters has been tested. For details, see factory certificate 2.1. Please inquire about operation with non-Siemens converters.

¹⁾ Zone 21 includes conductive and non-conductive dust.

Converter-fed operation specially for motors in type of protection “Ex n/Ex tD“ (Zone 2/22)

The motors must be ordered with:

• Design for Zone 2 and 22 for non-conductive dust (IP55) for converter-fed operation, derating – Order code M75

The order code M75 includes PTC thermistors according to temperature class 130 (B).

Factory certificate 2.1 analogous to that for Zones 2, 21 and 22. For non-Siemens converters, please inquire.

Zone 2: Ex II 3D Ex nA II T3 °C

Zone 22: Ex II 3D Ex tD A22 IP55 T125 °C

1LA8, 1PQ8 motors for converter-fed operation

When 1LA8 and 1PQ8 motors are ordered, the speed setting range and the load torque must be specified in plain text as well as whether the application is for a "Constant torque drive" or a "Fan/pump/compressor drive".

In some cases, a system test must be performed to ensure that the admissible limit temperature is not exceeded.

• A system test is not generally required for motors for applications with square-law load torque (T~n²).
• A system test is usually required for motors for applications with constant load torque. In individual cases in which the motor type has already been measured once using the same speed setting range, a new system test is not necessary.

Please inquire in such cases.

For all motors, an additional rating plate complete with the operating data for the converter is fitted.

Mechanical limit speeds n_max at maximum supply frequency f_max

SIMOTICS XP 1MJ Explosion-Proof Motors in Zone 1 with type of protection "de" (motor series 1MJ)

¹⁾ Request required for continuous operation in the f_max (n_max) range.

SIMOTICS XP 1MA Explosion-Proof Motors in Zone 1 with type of protection "e" (motor series 1MA)

1MA motors cannot be operated with a converter.

SIMOTICS XP 1LA/1LG Explosion-Proof Motors in Zones 2, 21 and 22 with type of protection "n" or "tD" (motor series 1LA and 1LG)

¹⁾ Request required for continuous operation in the f_max (n_max) range.

²⁾ For 1LA9 motors frame sizes 180 M/L and 200 L, n_max = 4500 rpm and f_max = 75 Hz.

VIK version

• VIK standard version – Order code K30
  "VIK" identification on rating plate.
• VIK Ex n version – Order codes K30 + C27
  "VIK" and "E nA II T3" identification on the rating plate according to Directive 94/9/EC (ATEX)
  "Ex nA II T3" identification will only be included on the rating plate on request as recommended by VIK.
  Note: Order code C27 can only be ordered in combination with order code K30.

Both versions include technology for Zone 2 to type of protection Ex nA II T3. Motors up to frame size 355 can be supplied in accordance with the technical requirements of the VIK (Verband der Industriellen Energie- und Kraftwirtschaft e.V.).

Not possible for 1LA5, 1LA6, 1LA7, 1LG4, 1MJ6 and 1MJ7 motors, because the VIK "standard version" must be designed to efficiency class IE2, "Ex n" and "Ex d/de" should have efficiency class IE2 according to the VIK recommendations published in March 2011. Not possible for 1LA9 motors (frame sizes 180 and 200), 1LG motors are supplied.

Note:

8-pole motors or motors < 0.75 kW in series 1LA6, 1LA7, 1LG4, 1MJ6 and 1MJ7 are still possible, because these motors are not in the output range of IE stamp.

1LG6 motors in frame size 315 are supplied with special connection boxes with a removable cable gland plate.

Note the output and dimensions in the case of 1LA8 motors. With 1LA8 motors, the connection boxes cannot be rotated by 4 x 90°. Motors in a vertical type of construction with the shaft extension pointing down must have a protective cover (type of construction code 4). Utilization according to temperature class 130 (B) is mandatory. Frame sizes 400 and 450 are not included in VIK.

Please inquire about converter-fed operation in all cases.

Motors in VIK version with mounted technology (brake, rotary pulse encoder, separately driven fan and anti-condensation heater) are not compatible with Zone 2. Designs for Zone 21/22 are not possible.

Ex certification for China

For projects in China in particular, explosion-proof motors are required that have been approved by a named Chinese testing authority.

Ex certification for China – Order code D32

The following motor series have Chinese Ex certification:

• Zone 1 type of protection "d" or Ex de IIC T4/Ex d IIC T4:
  1MJ6, 1MJ7 – only admissible for converter-fed operation in combination with the order codes A15, A16 or M77.
• Zone 2 type of protection "n" or Ex nA II T3:
  1LA6, 1LA7, 1LA9, 1LG when ordered in:
  • Design for Zone 2 for mains-fed operation
    Ex nA II T3 according to IEC/EN 60079-15 –
    Order code M72
  • Design for Zone 2 for converter-fed operation,
    with derating
    Ex nA II T3 according to IEC/EN 60079-15 –
    Order code M73.

In addition, the VIK version for motor series 1LA, 1LG can also be ordered with Ex certification for China.

When these motors are ordered in the version:

• "Ex certification for China" – Order code D32

the "NEPSI ¹⁾ certificate number" and the "NEPSI" logo are stamped on the rating plate.

For motor series 1LA8, the "CQST ²⁾ certificate number" and the logo "CQST" are then stamped on the rating plate.

¹⁾ NEPSI = National Supervision and Inspection Center for Explosion Protection and Safety of Instrumentation.

²⁾ CQST = China National Quality Supervision and Test Centre for Explosion Protected Electrical Products.

Ex certification for Russia

For commissioning explosion-proof motors in Russia, approval is required from a named Russian testing authority.

Ex certification for Russia – Order code D35

All explosion-proof motor versions in Part 4 of this catalog with type designation 1MA, 1MJ, 1LA5/6/7/9, and 1LG have Russian Ex approval.

In addition, the VIK version for motor series 1MA, 1LA and 1LG can also be ordered with Ex certification for Russia.

When these motors are ordered in the version:

• "Ex certification for Russia" – Order code D35

the "RTN ¹⁾ certificate number" and the "GOST R" logo are stamped on the rating plate.

If motors are supplied to Russia that are not installed in a machine (single motors or replacement motors), an authenticated GOST certificate is required for customs clearance. Please contact your local Siemens office for advice.

Every order for explosion-proof motors for the Russian market must be coordinated with your local Siemens Sales contact.

¹⁾ RTN = Rostekhnadzor

Coolant temperature and site altitude

Coolant temperature –40 to +40 °C for explosion-proof motor

For all 1LA5, 1LA6, 1LA7, 1LA9 (with the exception of 1LA9 with increased output), 1LG4, 1LG6, 1MA6 and 1MA7 motors in frame sizes 63 to 315 in the corresponding types of protection Ex e, Ex nA or Ex tD (Zone 21/22), the ambient operating temperature can be optionally extended to –40 °C. Extensive technical measures are necessary in this case (e.g.: metal external fan).
Order code D19

Order code D19 is not possible in combination with order code L03 "Vibration-proof version".

The mechanical limit speed for the 2-pole motors 1LA5/1LA9 in the Ex tD version is reduced for frame size 180 and above as compared to the values for mechanical limit speeds on (see “Mechanical limit speeds n_max at maximum supply frequency f_max”).

With converter-fed operation and operation on 60 Hz line supplies, particular attention has to be paid to the mechanical limit speeds – 60 Hz data are not stamped on the rating plate.
Alternative: 1LG4/1LG6 motors in Ex tD version.

Special technology

"Special technology" comprises mounted technology that is compatible with explosion-proof motors.

Explosion-proof motors can be implemented in a broader range of applications when explosion-proof rotary pulse encoders or explosion-proof separately driven fans are mounted.

The use of a separately driven fan is recommended to increase motor utilization at low speeds and to limit noise generation at speeds significantly higher than the synchronous speed.

Both of these results are normally only appropriate with converter-fed operation.

For explosion-proof motor versions with explosion-proof rotary pulse encoders or explosion-proof separately driven fans, see the tables below.

The following explosion-proof motor versions are available with explosion-proof rotary pulse encoders:

The following explosion-proof motor versions are available with explosion-proof separately driven fans:

Note: Alternatively, explosion-proof separately driven fans can also be used in mains-fed operation for special applications.

Explosion-proof rotary pulse encoder

The rotary pulse encoder can only be mounted on a standard non-drive end (NDE), i.e. a second shaft extension or protective cover cannot be supplied. In the case of a vertical mounting position, therefore, a suitable cover must be implemented by the customer to prevent small parts from falling into the fan cover (see also standard IEC/EN 60079-0).

Explosion-proof rotary pulse encoders do not have insulated bearings due to their design (please inquire).

The type of protection of the rotary pulse encoder must be observed. The relevant data are stamped on the rating plate of the rotary pulse encoder.

When an explosion-proof rotary pulse encoder is mounted, the length of the motor increases by Δl. For an explanation of the additionaldimensions and weights, see "Dimensions and weights of explosion-proof rotary pulse encoders".

LL 841 900 013 rotary pulse encoder

This encoder has a rugged construction and is therefore also suitable for difficult operating conditions. It is resistant to shock and vibration.

The LL 841 900 013 rotary pulse encoder for use in Zones 2, 21 and 22 can be supplied with the already mounted ADS diagnostic system for early detection of errors in the encoder.
Order code H86

Rotary pulse encoders Ex OG 9 DN 1024 l and Ex HOG 161 DN 1024 l

The HOG 10  DN 1024 I rotary pulse encoder has an extremely rugged design and is therefore ideally suited to difficult operating conditions.

Ex OG 9 DN 1024 l rotary pulse encoders (for frame sizes 90 to 160) and HOG 10 DN 1024 I rotary pulse encoders (for frame sizes 180 to 315) can be supplied already mounted for use with Ex d/de motors in Zone 1.
Order code H87

Technical specifications

Mounting of encoder for use below –20 °C and higher than +40 °C available on request.

Manufacturers of rotary pulse encoders

Type: LL 841 900 013:
Leine und Linde (Germany) GmbH
Bahnhofstraße 36
73430 Aalen, Germany
Tel. +49 (0) 73 61-78093-0
Fax +49 (0) 73 61-78093-11

http://www.leinelinde.com
E-mail: info@leinelinde.se

Types: Ex OG 9 DN 1024 l and Ex HOG 161 DN 1024 l:
Baumer Hübner GmbH
Max-Dohrn-Str. 2+4
10589 Berlin, Germany
Tel. +49 (0) 30-6 90 03-0
Fax +49 (0) 30-6 90 03-1 04

http://www.baumerhuebner.com
E-mail: info@baumerhuebner.com

Dimensions and weights of the explosion-proof rotary pulse encoders

Explosion-proof rotary pulse encoder (on cover), order codes H86 and H87

1MJ6 motors of frame sizes 90 to 160 feature the rugged, flanged rotary pulse encoder Ex OG 9 which offers a high level of mechanical protection for itself.

A protective cover of non-corrosive sheet steel is available for the explosion-proof rotary pulse encoders of the "Special technology" section, see "Mechanical protection for encoder" under "Mechanical design and degrees of protection".
Order code M68

This increases the motor length as follows:

• For 1LA motors, by up to 146 mm
• For 1MJ6 motors, by up to 175 mm
• For 1LG/1MJ7 motors, by up to 25 mm

Explosion-proof separately driven fan

The use of a separely driven fan is recommended to increase motor utilization at low speeds and to limit noise generation at speeds significantly higher than the synchronous speed. Both of these results can only be achieved with converter-fed operation. Please inquire about traction and vibratory operation.

The separately driven fan can be supplied already mounted for the following zones:

• Mounting of explosion-proof separately driven fan
  Ex de for use in Zone 1 –
  Order code M98
• Mounting of explosion-proof separately driven fan
  Ex nA for use in Zone 2 –
  Order code M95
• Mounting of explosion-proof separately driven fan
  II 2D Ex tD A21 for use in Zone 21 –
  Order code M96
• Mounting of explosion-proof separately driven fan
  II 3D Ex tD A22 for use in Zone 22 –
  Order code M97

The supply voltage for the explosion-proof motors with separately driven fan is specified as follows:
Type 2CW2 has a winding with a wide voltage input range (see "Technical data of separately driven fans for explosionproof basic motors 1LA5/6/7/9 and 1LG4/6 (frame sizes 180 and 200) in design for Zone 22" below).
The 1LA/1MJ explosion-proof motors with separately driven fan have a rated voltage (rated voltage range) with tolerances according to IEC/EN 60034-1, Categories A and B.

A rating plate with the operating data is fitted to each explosionproof motor with separately driven fan.
The type of protection of the explosion-proof motor with separately driven fan corresponds to that of the associated explosion-proof basic motor (note order codes for the appropriate zone).
Please note the direction of rotation of the separately driven fan (axial-flow fan) when connecting it.
Please inquire regarding coolant temperatures outside the range –20 to +40 °C.
The explosion-proof motors with separately driven fan are designed to IP55 degree of protection as standard (higher degrees of protection are available on request).
Motors with a separately driven fan must be equipped with a PTC thermistor as motor protection. For explosion-proof motors, the versions for converter-fed operation (order codes: M73, M38, M39, M75, M77, A15, A16) already have PTC thermistors for tripping. In the event of a fault in the separately driven fan, the PTC thermistor must reliably trip the motor.

For assignments and order numbers, see the tables "Technical data of separately driven fans for explosion-proof motors …" on the following pages. A rating plate listing all the important data is fitted to the separately driven fan. For supply voltages outside the rated voltage range for 1LA motors, order code Y81 and plain text are required. Please note the direction of rotation of the separately driven fan (axial-flow fan) when connecting it. The admissible coolant temperatures are CT_min –20 °C or CT_max +40 °C. Lower coolant temperatures are available on request.

When a separately driven fan is mounted, the length of the motor increases by Δl. For an explanation of the additional dimensions and weights, see "Dimensions and weights of explosion-proof separately driven fans".

Technical data of separately driven fans for explosion-proof motors 1LA5/6/7/9 and 1LG4/6 (frame sizes 180 and 200) in Ex tD design for Zone 22

¹⁾ Separately driven fans with Order No. 1LA. ... are used for 1LG motors of frame size 225 and above.

Technical data of separately driven fans for explosion-proof motors 1LG4/6 (frame sizes 225 to 315) in Ex nA and Ex tD designs for Zone 2 ¹⁾, 21, 22

¹⁾ Motors for Zone 2 have no rated voltage range.

²⁾ The values are only valid for the average value of the rated voltage, so a rated voltage range is not admissible.

Technical data of separately driven fans for explosion-proof motors 1MJ7 (frame sizes 225 to 315) in Ex de design for Zone 1

Dimensions and weights of the explosion-proof separately driven fans

Explosion-proof rotary pulse encoder (on cover), order codes H86 and H87

1LA frame sizes 100 to 225, 1LG frame sizes 180 and 200	1LG frame size 225 and above 1MJ7 frame size 225 and above
Explosion-proof separately driven fan Order code M97	Separately driven fan Order codes M95, M96, M98