General Safety Precautions; General Electrical Protective Measures - HEIDENHAIN TNC 410 M Technical Manual

4.1.3 General Safety Precautions

4.1.4 General Electrical Protective Measures

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The inverter systems from HEIDENHAIN comply with the safety regulations
for the electrical equipment of machines in accordance with EN 60204.
Danger
During the operation of electrical equipment certain parts can inevitably
be under power.
Work on HEIDENHAIN inverter systems and motors may only be
performed by trained personnel.
The personnel must be familiar with the "Technical Manual for Inverter
Systems and Motors" and must keep it somewhere well visible and easily
accessible.
The personnel must be familiar with the safety precautions and warnings
in the "Technical Manual for Inverter Systems and Motors."
The faultless and safe operation of HEIDENHAIN inverter systems
requires proper transport as well as professional mounting, installation
and commissioning. Furthermore, careful maintenance and professional
servicing of the HEIDENHAIN components must be ensured.
HEIDENHAIN warns that the motors operated by inverter systems may
cause hazardous movements of the machine axes.
Ensure that the main switch of the control or machine is switched off
when you engage or disengage connecting elements or connection
clamps. Before you start working, ensure that the system is not under
power.
Danger
With HEIDENHAIN inverter systems, the leakage current (current at the
equipment grounding conductor) is sometimes higher than 3.5 mA.
The equipment grounding conductor must therefore have a cross section
of at least 10 mm
Warning
HEIDENHAIN performs a voltage test according to EN 60204 on the
inverters. If you want to perform this test on the entire system, you must
disconnect the power connection of the HEIDENHAIN inverter system in
order to prevent damage.
HEIDENHAIN Technical Manual for Inverter Systems and Motors
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according to IEC 61800-5-1.