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Interference Immunity; Influence On The Line Power Supply Through A Strongly Irregular Torque; Interference Voltages When Operating The Converter; Electromagnetic Fields When Operating Electrical Power Engineering Installations - Siemens 1LA8 Operating & Installation Instructions Manual

Low-voltage motor simotics tn series n-compact.
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Interference immunity

By selecting suitable signal cables and evaluation units, companies operating complete plants
and systems must ensure that the interference immunity of the machine is not diminished.

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.

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
● You must put appropriate EMC measures in place.
Electromagnetic fields when operating electrical power engineering
Interference to electronic devices caused by electrical power equipment
Electrical power equipment generate electric fields during operation. Potentially lethal
malfunctions can occur in medical implants, e.g. pacemakers, in the vicinity of electrical power
equipment. Data may be lost on magnetic or electronic data carriers.
● It is forbidden for people with pacemakers to enter the vicinity of the machine.
● Protect the personnel working in the plant by taking appropriate measures, such as
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017
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.
erecting identifying markings, safety barriers and warning signs and giving safety talks.
Observe the nationally applicable health and safety regulations.
Do not carry any magnetic or electronic data media.
Safety information
2.8 Interference immunity


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