nord NORDAC START Series, User Manual

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NORDAC START (SK 135E / SK 175E) – Users Manual for Motor Starters
48 BU 0135 en-4118
2.4.1 Operation in potentially explosive environments - ATEX zone 22 3D
All of the conditions which must be observed for operation of the frequency inverter in an explosion
hazard environment (ATEX) are listed below.
2.4.1.1 Modification of the device for compliance with Category 3D
Only a specially modified device is permissible for operation in ATEX zone 22. This adaptation is only
made at the NORD factory. In order to use the device in ATEX Zone 22, the diagnostic caps are
replaced with aluminium / glass versions, among other things.
( 1 ) Year of manufacture
( 2 ) Marking of the device (ATEX)
IP55:
II 3D Ex tc IIIB T125 °C Dc X
IP66:
II 3D Ex tc IIIC T125 °C Dc X
Categorisation:
• Protection with "housing"
• Procedure "A" Zone "22" Category 3D
• Protection class IP55 / IP66 (according to the
device)

IP66 is required for conductive dust
• Maximum surface temperature 125°C
• Ambient temperature -20°C to +40°C
Information
Potential damage
Devices in series SK 1x5E and the permitted options are only designed for a degree of mechanical stress that
corresponds to a low impact energy of 7J.
Higher loads will lead to damage to or in the device.
The necessary components for making adaptations are contained in the ATEX kits.
Device Kit designation Part Number Quantity Document
SK 1x5E-… (IP55) SK 1xxE-ATEX-IP55 275274207 1 piece TI 275274207
SK 1xxE-ATEX-IP66 275274208 1 piece TI 275274208
SK 1x5E-…-C (IP66) SK 1xxE-ATEX-IP66 275274208 2 pieces TI 275274208
2.4.1.2 Options for ATEX Zone 22, category 3D
In order to ensure that the device is ATEX-compliant, its optional modules must also be approved for
potentially explosive areas. Option modules that are not in the following list may
not be used in an