2 Safety information
Electromagnetic influences
Lenze · Inverter i510 / i550 - Cabinet · Operation Manual · 0.4 EN · 02/2016 11
2.7 Electromagnetic influences
The i500 inverters can be installed in drive systems of category C2 according to EN 61800-3. These devices can
cause radio interferences in residential areas. In this case, special measures can be necessary.
Possible electromagnetic interference of drive and control system
Sporadic malfunctions can cause unsafe operation conditions.
Commissioning of the inverter and the related drive system (i.e. starting of the operation as directed) is
only allowed when there is compliance with the EMC Directive (2004/108/EC).
The inverter must be installed in a housing (e.g. control cabinet) to meet the limit values for radio inter-
ferences valid at the site of installation.
2.8 Residual hazards
Consider the following residual hazards in the risk assessment of the application.
Unexpected drive motion
Possible personal injury or property damage.
If there is a short circuit of two power transistors in the inverter, a residual movement of up to 180°/number of
pole pairs can occur at the connected motor! (For 4-pole motor: residual movement max. 180°/2 = 90°).
Dangerous residual voltage – long discharge time!
An electrical shock can cause death or severe personal injury.
After the inverter or the drive system has been disconnected from the supply voltage, all live compo-
nents and power terminals must not be touched immediately because capacitors in the inverter can still
be charged.
Observe the waiting time on the inverter label.
High leakage current
i500 inverters may cause a DC current in the PE conductor.
Possible personal injury due to inappropriate or insufficient protective measures.
If a residual current device (RCD) is used for protection against direct or indirect contact for an inverter
with three-phase supply, only a residual current device (RCD) of type B is permissible on the supply side
of the inverter.
If the inverter has a single-phase supply, a residual current device (RCD) of type A is also permissible.
Apart from using a residual current device (RCD), other protective measures can be taken as well, e.g.
electrical isolation by double or reinforced insulation or isolation from the supply system by means of a
transformer.
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