Siemens SIRIUS 3RW55 Equipment Manual page 18

Safety information
2.6 ATEX / IECEx
Line protection
Avoid impermissibly high cable surface temperatures by correctly dimensioning conductor cross
sections. Select a sufficiently large conductor cross section.
Emergency start and emergency run not permissible
If the motor is operated in Class I and Class II Hazardous Locations, the functions "emergency
start" (Page 189) and "emergency run" (Page 191) are not permissible.
Cyclic test of the motor protection functions
Note that performing the self-test (user-test) without 3RW5 HMI High Feature results in loss of
the certified motor overload protection according to ATEX / IECEx and there will be no explosion
protection.
Only perform the self-test (user-test) (Page 264) locally with the 3RW5 HMI High Feature to
ensure that the correct 3RW55 or 3RW55 Failsafe soft starter is tested. Only in this way can the
certified motor overload protection according to ATEX/IECEx be guaranteed.
On 3RW55 or 3RW55 Failsafe soft starters in ATEX / IECEx applications, perform the self-test
(user-test) (Page 264) during commissioning and periodically at intervals of no more than
36 months.
Certification of the 3RW55 and 3RW55 Failsafe soft starters
Note
Firmware versions and product versions of the 3RW55 soft starter with ATEX / IECEx
certification
For 3RW55 soft starters, certified motor overload protection according to ATEX / IECEx is only
provided from firmware version V2.0 and product version E02 (does not apply to 3RW55 Failsafe
soft starters).
Note that it is not possible to downgrade to a previous firmware version because, in that case,
certified motor overload protection according to ATEX / IECEx cannot be guaranteed.
The motor overload protection of the 3RW55 and 3RW55 Failsafe soft starters is ATEX / IECEx-
certified to SIL 1.
The 3RW55 and 3RW55 Failsafe soft starters are approved under Equipment Groups I and II,
Category (2) or (M2) in zones "G" and "D". Zones "G" and "D" are areas in which explosive gas,
vapor, mist or air mixtures and combustible dust are present:
IECEx BVS 19.0014 X [Ex]
BVS 18 ATEX F003 X
II (2)G [Ex eb Gb] [Ex db Gb] [Ex pxb Gb]
II (2)D [Ex tb Db] [Ex pxb Db]
I (M2) [Ex db Mb]
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SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006