Safety and commissioning information for Ex areas
14.1 Motor protection functions (overload protection, thermistor protection)
SIMOCODE pro
System Manual, 05/2019, A5E40507475002A/RS-AD/004
305
The devices are suitable for protecting motors in potentially explosive areas in accordance
with the above standards.
Qualified personnel required
All work involved in connecting, commissioning and maintenance must be carried out by
personnel.
Failure to follow proper procedures may result in
personal injury and damage to property
.
14.1.3 Installation and commissioning – motor protection functions
(overload protection, thermistor protection)
14.1.3.1 Operating Instructions
SIMOCODE pro Operating Instructions
Please observe the SIMOCODE pro Operating Instructions (enclosed with the devices).
You can find the Operating Instructions for SIMOCODE pro listed in Chapter General
information about commissioning and service (Page 255) or at Operating Instructions
(https://support.industry.siemens.com/cs/ww/en/ps/16027/man
) in the Industry
Online Support.
14.1.3.2 Setting the rated motor current
Notes/example
Set the 3UF7 to the rated motor current (according to the type plate or design test certificate
of the motor).
Trip class / tripping characteristic
Pay attention to the trip class or the tripping characteristic of the 3UF7.
Choose the trip class so that the motor is thermally protected even with a blocked rotor.
The motor, cables, and contactor must be dimensioned for the selected trip class.
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