Siemens SIMOTICS XP 1MD4, Инструкция по эксплуатации и монтажу, Страница: 28 / 128

PTC thermistors as sole protection guarantee explosion protection in conjunction with function
tested tripping devices with type of protection marking II (2) G. No voltage > 2.5 V may be
applied for any continuity test required on the temperature sensor.
For pole-changing motors, use a direct temperature monitoring sensor as stated on the rating
plate, e.g. thermistor according to DIN 44081/44082, for each speed level in addition to the
separate, mutually interlocked motor protection relays.
4.4 Interlock circuit for anti-condensation heating
If the anti-condensation heating is operated while the machine is running, this can increase
the temperatures inside the machine.
● Install an interlock circuit that switches off the anti-condensation heating once the main
machine is switched on.
● Only operate anti-condensation heating when the machine is switched off.
4.5 Noise emissions
WARNING
Noise emissions
During operation, the machine's noise emission levels can exceed those permitted at the
workplace, which can cause hearing damage.
Take steps to reduce noise, such as introducing covers and protective insulation or adopting
hearing protection measures, so that the machine can be operated safely within your system.
4.6 Voltage and frequency fluctuations during line operation
Unless stated otherwise on the rating plate, the permissible voltage fluctuation is ± 10% and
the permissible frequency fluctuation is ± 2%.
The following always applies: Under practical operating conditions, a machine may sometimes
have to be operated outside the tolerance limits. Exceptions of this sort should be limited with
regard to the values that arise, how often and for how long they occur. Where possible and
within a reasonable time take corrective actions such as reducing the power. Such actions can
avoid thermal ageing leading to a reduction in the service life of the machine.
NOTICE
Overheating of the winding
Exceeding the permissible tolerances for voltage and frequency can lead to an impermissibly
high temperature rise in the windings and thus cause long-term damage to the machine.
Preparations for use
4.6 Voltage and frequency fluctuations during line operation
SIMOTICS XP 1MD4/1MD5
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Operating Instructions 05/2015