Lenze EMB934x - Manual (Page 103)

Electrical installation
Important notes
Device protection
5
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103 EDBMB9340 DE/EN/FR 12.0
5.1.3 Device protection
(
Stop!
The regenerative power supply module contains components which can be
destroyed in case of contact by electrostatic discharge!
Prior to working on the controller, the personnel must be free of electrostatic
charges by touching an earthed metal surface.
ƒ Frequent mains switching can overload the internal starting current limitation. In
case of cyclic mains switching the regenerative power supply module may only be
switched on once every three minutes.
ƒ Connect a mains filter before using the regenerative power supply module.
ƒ The supply and feedback module is protected by external fuses.
ƒ In case of condensation, do not connect the regenerative power supply module to
the mains voltage before the visible moisture has evaporated.
ƒ Cover unused control inputs and outputs with plugs.
5.1.4 Supply forms / electrical supply conditions
Please observe the restrictions of each mains type!
Mains Operation of the controllers Notes
With earthed neutral
(TT/TN systems) No restrictions Observe controller ratings
With isolated neutral
(IT systems) Not permitted Regenerative power supply module
will be destroyed
With grounded phase
(
Stop!
ƒ The supply system must be able to absorb the recovered energy. Otherwise,
overvoltages may be generated in the supply system which destroy all loads
connected.
ƒ Maximum system impedance acc. to EN 61000−3−3: R = 0.24
W, L = 480 mH