General information

Ex motors in vertical type of construction with shaft extension pointing down must have a protective cover (position 14 of Article No.: G).

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 1MM1, 1MH1, 1MQ1 and 1MN1 motors in the explosion-proof design, the cable entry plate is supplied undrilled as standard.

This enables you to adapt the number and size of the boreholes to the rated conditions. The cable entry can be rotated by 180°.

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.

When metal armored cables are routed into the auxiliary terminal boxes, the metal shield must only be grounded once: either in the auxiliary terminal box or in the control room of the operator.

In the case of SIMOTICS FD motors 1MM1, 1MH1, 1MQ1 and 1MN1, monitoring of the bearing temperature is only mandatory for Zone 22 (order code A72).

Type of protection Ex nA for use in Zone 2

• Design for Zone 2 for mains-fed operation (order code M72)
• Design for Zone 2 for converter-fed operation (order code M73)

1MM1, 1MH1, 1MQ1 and 1MN1 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 is below the limit temperature of the respective temperature class. The ventilation system complies with IEC/EN 60079-0/-15/-31. The motors are equipped with an external grounding terminal. The terminal box is designed for Ex e type of protection.

Ambient temperature -0 °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 IIC T3

Type of protection Ex tc for use in Zone 22

Ex tc in accordance with IEC/EN 60079-31 for Zone 22 with non-conductive dust (IP55)

• Design for Zone 22 for mains-fed operation (order code M35)
• Design for Zone 22 for converter-fed operation (order code M39)

1MM1, 1MH1, 1MQ1 and 1MN1 motors are modified for thispurpose for use in zones subject to dust and explosion hazards.The surface temperature is ? 125 °C at rated duty.An external grounding terminal and a metal external fan arefitted to the motors.

Certification:

• Zone 22: EC Declaration of Conformity, IEC Ex Certificate of Conformity

Identification on the rating plate (extra rating plate for SIMOTICS FD motors):

• Zone 22: Ex II 3D Ex tc IIIB T125 °C

Ambient temperature -0 °C to +60 °C, whereby derating applies from 40 °C upwards. Other temperatures are available on request.

This version can be ordered with the note "Operation in Zone 2 or Zone 22".

Converter-fed (1MM1, 1MH1, 1MQ1, 1MN1) or mains-fed operation (1LH1)

With converter-fed operation, the torque reduction factors for drives for fans, pumps and compressors must be configured according to the table in the section "Derating". The torque reduction factors for constant torque drives will be configured, on request, on specification of the speed control range and the required torque.

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.

Explosion-proof motors 1MM1, 1MH1, 1MQ1 and 1MN1

The motors of the 1MM1, 1MH1, 1MQ1 and 1MN1 series are available in Ex nA (Zone 2) or Ex tc (Zone 22) types of protection. The motors have PTC thermistors for alarm and tripping in accordance with thermal class 155(F). Ambient temperatures in the range from -20 to +60 °C are possible, whereby additional derating applies from +40 °C upwards. Please inquire in such cases.

For 1MM1 motors, order code K35 (metal external fan) must be specified in the order. The 1MM1...-3BB..-1… motors are an exceptional case, however, because they are equipped with a unidirectional external fan. When ordering these motors, order code K37 must be specified for clockwise rotation or order code K38 for anticlockwise rotation.
An EC Declaration of Conformity is enclosed with every motor. In the case of motors for converter-fed operation, the following information must be supplied in the order or inquiry in plain text:

• For a constant torque drive (order code B61: T = const.) ordrives for fans, pumps and compressors (order code B60: M ~ n²)
• Maximum load torque
• Speed control range
• Utilized thermal class that the motor should or must comply with

Note:
Motors of the 1L.1 series (non-Ex motors) are utilized in accordance with thermal class 180 (H)/155 (F) (or 155 (H)/130 (B) – order code C10). Derating of motors of the 1M.1 series (Ex motors) results in a corresponding reduction in thermal utilization. These specifications regarding operation are labelled on an extra rating plate on the motor. The rating data on the rating plateis specified for the load torque at maximum speed.

Type of protection Ex nA for use in Zone 2

The motors are modified for operation in Zone 2 and designed for compliance with temperature class T3 (maximum surface temperature of 200 °C inside the motor).

• Design for Zone 2 for mains-fed operation – order code M72:
  Standard utilization in accordance with thermal class 130 (B). Utilization in accordance with thermal class 155 (F) with service factor (order code C14) possible on request.
• Design for Zone 2 for converter-fed operation – order code M73:
  Standard utilization in accordance with thermal class 155 (F) in drives for fans, pumps and compressors (order code B60: M ~ n²) ^*). For utilization in accordance with thermal class 130 (B) the output must be reduced by 14 % from the rated output of a comparable 1L.1 (non-Ex) motor. In constant torque drives (order code B61: T = const) the thermal utilization depends on the value of the load torque and the speed control range (> 130 (B) and/or 155 (F)). The maximum possible constant torque is dependent on the speed control range and the cooling method of the motor > thermal torque limit characteristic.
  IEC/EN 60079-15 specifies that the motor and converter must be tested as a unit. As an alternative, however, it is also admissible for the thermal response to be determined by a calculation. The thermal response of the motors for operation on Siemens converters is known, so a system test is not generally required for drives for fans, pumps and compressors. Please inquire as to whether a system test is necessary or not in thecase of a constant torque drive > constant torque drives on request only.

The following identification is included on an extra rating plate on the motor:

II 3G Ex nA IIC T3 Gc, IEC/EN 60079

Type of protection Ex tc for use in Zone 22 for non-conductive dust

The motors are modified for operation in Zone 22 and designed such that an external motor surface temperature of 125 °C is not exceeded. For the 1MM1, 1MH1, 1MQ1 and 1MN1 motor series, monitoring of the bearing temperature is required for operation in Zone 22. These motors are therefore equipped with bearing temperature sensors as standard.

• Design for Zone 22 for mains-fed operation –
  order code M35:
  Standard utilization in accordance with thermal class 130 (B).Utilization in accordance with thermal class 155 (F) with service factor (order code C14) possible on request.
• Design for Zone 22 for converter-fed operation –
  order code M39:
  Standard utilization approximately in accordance with thermal class 155 (F) in drives for fans, pumps and compressors (order code B60: M ~ n²) ^*). For utilization in accordance with thermal class 130 (B) the output must be reduced by 14 % from the rated output of a comparable 1L.1 (non-Ex) motor. In constant torque drives (order code B61: T = const) the thermal utilization depends on the value of the load torque andthe speed control range (> 130 (B) and/or 155 (F)). The maximum possible constant torque is dependent on the speed control range and the cooling method of the motor > thermal torque limit characteristic. When configuring these motors, therefore, it is important to note that the maximum admissible torque, as a function of speed, is not exceeded. Please inquire as to whether a system test is necessary or not in the case of a constant torque drive > constant torque drives on request only.

The following identification is included on an extra rating plate on the motor:

II 3D Ex tc IIIB T125°C Dc, IEC/EN 60079

Operation on non-Siemens converter

It is normally necessary to inquire regarding operation of the motors on a non-Siemens converter, regardless of the type of protection and torque characteristic of the driven machine. A test must be performed to ensure that the temperature limits are complied with. This should take place at the customer's premises (not possible in the factory).

Derating

In comparison to non-Ex motors, the rated output of Ex motors is reduced. Derating is performed in accordance with defined factors. The reference output here is the rated output of the non-Ex motor.

Rating plate labeling for Ex motors of the SIMOTICS FD series

Rating plate

In contrast to the non-Ex motor, the rating plate specifies that the voltage tolerance is compliant with IEC/EN 60034-1, Zone A.

Valid for:
Order code M72: Zone 2 for mains-fed motors
Order code M73: Zone 2 for converter-fed motors
Order code M35: Zone 22 for mains-fed motors
Order code M39: Zone 22 for converter-fed motors

If, in addition to order code M72 or M73, order code D36 (conformity statement) and/or D37 (IEC Ex certificate) is also specified in the order, the corresponding certificate numbers will be stamped on the rating plate (only applicable to order codes M72 and M73).

Extra rating plate

On the extra rating plate, the torque characteristic, speed or frequency control range and the torque are specified as a minimum.

Valid for:
Order code M73: Zone 2 for converter-fed motors
Order code M39: Zone 22 for converter-fed motors
Order code M60: M ~ n²

Ex plate

Zone 2:

Note:
The letter(s) between "Ex nA" and "II T3 Gc" vary according to the additional components of the motor (e.g. temperature sensor, anti-condensation heating, etc.).

Valid for:
Order code M72: Zone 2 for mains-fed motors
Order code M73: Zone 2 for converter-fed motors

Valid for:
Order code M35: Zone 22 for mains-fed motors
Order code M39: Zone 22 for converter-fed motors

VIK version

• VIK standard version – Order code K30
  "VIK" identification on rating plate.
• VIK Ex n version – Order codes K30 + C27
  Kennzeichnung „VIK" und „Ex nA IIC T3“ auf dem Leistungsschild nach Richtlinie 94/9/EG (ATEX)
  "VIK" and "Ex nA IIC T3" identification on the rating plate according to Directive 94/9/EC (ATEX)" Ex nA IIC T3" identification will only be included on the rating plate on request as recommended by VIK.
  Note:
  Order coder C27 can only be ordered in combination with order code K30.

Both versions include technology for Zone 2 to type of protection Ex nA IIC 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.", the Association of the Industrial Energy and Power Industry).

Coolant temperature

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

For all 1MM1, 1MH1, 1MQ1 and 1MN1 motors in explosion protection types Ex nA or Ex tc (Zone 2/22), the operating ambient temperature range can be optionally increased to – 40 °C. Extensive technical measures are necessary in this case (e.g.: metal external fan).
Order code D19

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.

For motors of the 1MQ1 series with forced ventilation, only radially mounted separately driven fans are available (position 16 of Article No. = 2, 3, 4).

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 for motors of the 1MM1 series, 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).

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 dimension l. For an explanation of the additional dimensions and weights, see "Dimensions and weights of explosion-proof rotary pulse encoders" on the website of the encoder manufacturer.

HOG 10 and HOG 11 rotary pulse encoders

The HOG 10 and HOG 11 rotary pulse encoders have an extremely rugged design and are therefore ideally suited to difficult operating conditions.

The following order codes are available for explosion-proof rotary pulse encoders (ATEX):

• H73: HOG 10 D 1024 I
• H83: HOG 10 DN 2048
• H88: HOG 11 DN 1024 I (16 mm) special corrosion protection

Encoder mounting for use below –20 °C and above +40 °C is available on request.

Please consult the manufacturer's website for further information and technical specifications of the encoders.

Manufacturers of rotary pulse encoders

Types: HOG 10, HOG11:
Baumer Hubner 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