Explosion protected drive solutions by NORD

Drive Systems for explosion hazard areas
of Zones 1, 2, 21 or 22

For many decades, NORD DRIVESYSTEMS has supplied drive units for use in potentially explosive environments. Since 2003 this range has also included specially designed gear units which comply with EU Ex directives (ATEX).

High Flexibility

  • Motors optionally designed for inverter operation
  • Direct mounting of the motor to the gear unit is possible in many cases
  • Depending on the zone, optional external fan, backstop, brake
  • If desired, a combined dust/gas explosion protection is available (not suited if explosive gases and particles are present simultaneously)
  • Systems for ambient temperatures up to +60 °C
  • Worldwide shipping with documentation in more than 25 languages

European Union "ATEX"

For many decades, the EU has been using the ATEX technical standards to ensure the safe operation of machinery and equipment.
With its Ex specifications for mechanical devices regarding the former Directive 94/9/EG the EU acted as a pioneer at that time.

Scope of Application
EU member states + others such as Norway and Switzerland

Basis
Technical standards based on IEC standards (IEC - International Electrotechnical Commission)

Based on ...
Directive 2014/34/EU relates to mechanical and electrical devices for use in explosion hazard areas. (In addition to this directive, which directly relates to explosion protection, the Ecodesign, EMC and RoHS directives must also be complied with). Directive 2014/34/EU relates to mechanical and electrical devices for use in explosion hazard areas. (In addition to this directive, which directly relates to explosion protection, the Ecodesign, EMC and RoHS directives must also be complied with).

Ex standards

  • for motors: DIN EN 60079-0, DIN EN 60079-7, DIN EN 60079-31
  • for inverters + starters: DIN EN 60079-0:2012, DIN EN 60079-31:2019, DIN EN ISO 80079-36, DIN EN ISO 80079-37
  • or gear units: DIN EN ISO 80079-36:2016, DIN EN ISO 80079-37:2016

Documents
The suitability of the device for explosion protection is documented by:

  • Type Test Certificate and Declaration of Conformity for Category 2 motors
  • Declaration of Conformity for Category 3 motors
  • Declaration of Conformity for gear units
  • Official bodies involved:
    • Physikalisch-Technischen Bundesanstalt PTB
    • DEKRA EXAM

Audits: The production and quality control of NORD DRIVESYSTEMS is audited at regular intervals by a Notified Body according to the regulations of EU 2014/34.

Energy efficient motors
Energy efficiency requirements for motors:

According to Regulation 640/2009 motors for explosion protection (gas and dust) constitute an exception and are therefore not subject to requirements with regard to this. However, customers are increasingly specifying the use of IE2 and IE3 motors.

Australia and New Zealand IECEx

IECEx approval can be helpful for the approval of explosion protected electrical equipment according to national standards.

Scope of Application
Australia and New Zealand

Basis
Technical standards based on IEC standards (International Electrotechnical Commission)

Based on ...

  • IECEx 01 IEC Scheme for the Certification to Standards for Electrical Equipment for "Explosive Atmospheres (IECEx Scheme) - Basic Rules" and
  • IECEx 02 IEC Scheme for the Certification to Standards for Electrical Equipment for "Explosive Atmospheres (IECEx Scheme) - Rules of Procedure"

Ex standards

  • for motors
    • IEC 60079-0 Explosive atmospheres - Part 0: Equipment - General requirements
    • IEC 60079-31 Explosive atmospheres - Part 31: Equipment dust ignition protection by enclosure "t"
  • for gear units
    • ISO 80079-36 Non-electrical equipment for explosive - Part 36: atmospheres - Basic method and requirements
    • ISO 80079-37 Non-electrical equipment for explosive - Part 37: atmospheres - Non electrical type of protection constructional safety "c", control of ignition source "b", liquid immersion "k"

Documents

  • Official bodies involved: DEKRA EXAM and PTB

Audits: IECEx audits by Ex- testing laboratories and (Ex-certification bodies) are mandatory.Performed by the PTB as the notified body.

Energy efficient motors
Energy efficiency requirements for motors:

From the point of view of the IECEx there are neither requirements nor restrictions with regard to energy efficiency classes. NORD supplies motors with efficiency classes IE1 and IE2 with IECx approval.

Currently, Getriebebau NORD does not offer EX gear units according to IECEx. A combination of an IECEx motor and a gear unit, complying with EU standard, is possible.

EurAsian EAC EX

EAC (abbreviation for EurAsian Conformity) is a label which states that a product complies with the specifi cations of the Eurasian Economic Union regarding to technical specifi cation, labelling and documentation.

EAC Ex indicated conformity with the standard TR CU 012/2011 1) "On safety of equipment intended for use in explosive atmospheres". This contains technical specifi cations which are largely based on the IEC Ex as well as standards which are used in the EU.

Certififed NORD products
The conformity certifi cation is completed in the form of a declaration and certifi cation. NORD products, their production and quality management have been accepted and approved by the certifying body NANIO CCVE. The corresponding certifi cates can be found under www.nord.com Documentation / Certififcates

Scope of Application
Russia, Belarus, Armenia, Kazakhstan and Kyrgyzstan

Basis
TR CU 012/2011 "On safety of equipment intended for use in explosive atmospheres". Technical standards based on IEC (International Electrotechnical Commission) standards. In particular IEC 60079 and IEC 80079.

Products from NORD DRIVESYSTEMS compliant with EAC Ex are tested and produced in a similar manner to products according to Directive 2014/34/EU ATEX.

The technical data of the motors correspond to that of ATEX motors used in Europe - see page C1-2 and C5 as well as E1-2.

Standards for NORD EX motors
Applied standards for NORD EX motors

  • ГОСТ Standard
    • ГОСТ 31610.0-2014
    • ГОСТ P MЭЌ 60079-31-2013
    • ГОСТ P MЭЌ 60079-7-2012
    • ГОСТ 31610.15-2014
  • IEC Standard
    • IEC 60079-0:2011
    • IEC 60079-31:2013
    • IEC 60079-7:2006
    • IEC 60079-15:2010

Canada CEC

With the 2015 version of the Canadian Electrical Code (CEC) the IEC concept based on zones was adopted:

  • Repairs and extensions of existing systems may continue to be carried out in accordance with the requirements of the division system.
    • Article 18-000, (see also NEC 500)

CEC - Canadian Electrical Code
CEC in Canada – with CEC 2015 several articles have been completely revised or deleted entirely!
Article:

  • 18-000: Description of scope of application
  • 18-002: Definition of hazard areas
  • 18-004: Classification of gases and dusts
  • 18-006: Classification of gases – Zone 0, 1 and 2
  • 18-008: Classification of dusts – Zone 20, 21 and 22
  • 18 -Annex J: Classification according to the division system for existing plants

The zone system according to IEC Ex protection is mandatory for all new installations as of 2015!

Hazloc - Explosion protection in North America

Unlike in many other parts of the world, the explosion protection in the US is not based on IEC specifications.

With a similarly high safety level, this results in specific technical solutions as well as a separate categorisation of technical devices with regard to the corresponding explosive environment and the explosive mixture.

Safety standard NEC
The specifications for electrical equipment originate from the NEC The National Electrical Code (NEC) is a safety standard of the United States of America. This formulates the specifications for the design of electrical installations.

HazLoc
Unlike e.g. in Europe, devices are not categorised according to their use, but rather into "Classes" and "Divisions". In the USA the term "Hazloc" is used in a similar manner to "ATEX" in Europe.

Scope of Application
USA (and Canada for existing plants)

Basis
USA: NEC National Electrical Code (Canada: CEC Canadian Electrical Code)

In 1996, the IEC classification system (categorisation according to zones) was also introduced for Class I. This change was made by Article 505 of the NEC, which gives the user the opportunity to choose the system that is technically and economically optimal for their purposes. In 2005 Zones 20, 21 and 22 for areas with flammable dust (Article 506) were introduced.

NEC - National Electrical Code
Article

  • 500: General requirements for Class I, II and III Divisions
  • 501: Requirements for Class I Divisions
  • 502: Requirements for Class II Divisions
  • 503: Requirements for Class III Divisions
  • 504: Requirements for Class I, II and III Divisions with regard to intrinsic safety (IS)
  • 505: General and specific requirements for Zone 0, 1 and 2
  • 506: General and specific requirements for Zone 20, 21 and 22