Safety information
2.10 Influence on the line power supply through a strongly irregular torque
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
17
2.10 Influence on the line power supply through a strongly irregular
torque
A strongly irregular torque, for example with the drive of a reciprocating motor, forces a non-
sinusoidal motor current. The emerging harmonics can have an impermissible influence on
the line power supply via the connection lines.
2.11 Interference voltages when operating the converter
Interference voltages when operating the converter
When a converter is in operation, the emitted interference varies in strength depending on
the converter (manufacturer, type, interference suppression measures undertaken). On
machines with integrated sensors (e.g. PTC thermistors), interference voltages caused by
the converter may occur on the sensor lead. This can cause faults which can result in
eventual or immediate death, serious injury or material damage.
● Comply with the EMC information provided by the manufacturer of the converter. This is
how you prevent the limit values stipulated by IEC/EN 61000-6-3 for the drive system
(consisting of the machine and converter) from being exceeded.
● You must put appropriate EMC measures in place.
2.12 Special designs and construction versions
Before carry out any work on the machine, determine the machine version.
If there are any deviations or uncertainty, contact the manufacturer, specifying the type
designation and serial number (see the rating plate), or contact the Service Center
(Page 159).
2.13 Special conditions for use
A complete list of all special conditions for safely using explosion-protected machines with X
marking is provided in the
certificates (Page 163).
Zone 2, 21, 22
BVS 14 ATEX E 081 X, BVS 14 ATEX E 082 X
It is only permissible that the motor is fed from a voltage-source DC link converter with pulse
width modulation, maintaining the parameters listed in Section 15.3. Before commissioning,
it must be carefully ensured that when fed from a converter, no inadmissibly high
overvoltages occur at the motor terminals. The clearances and creepage distances in the
terminal box do not permit overvoltages as a result of converter operation with a periodic
peak value of more than 1500 V for rated voltages ≤ 1000 V.
The motor insulation system may mean that it is necessary to further limit periodically
occurring overvoltages.
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