Residual Hazards; Motor Protection - Lenze Inverter i550 Cabinet Montage- Und Einschaltanleitung

Safety instructions

Residual hazards

Residual hazards
Even if notes given are taken into consideration and protective measures are implemented, the occurrence
of residual risks cannot be fully prevented.
The user must take the residual hazards mentioned into consideration in the risk assessment for his/her
machine/system.
If the above is disregarded, this can lead to severe injuries to persons and damage to property!
Product
Observe the warning labels on the product!
Icon Description
Electrostatic sensitive devices:
Before working on the product, the staff must ensure to be free of electrostatic charge!
Dangerous electrical voltage
Before working on the product, check if no voltage is applied to the power terminals!
After mains disconnection, the power terminals carry the hazardous electrical voltage given on the product!
High leakage current:
Carry out fixed installation and PE connection in compliance with EN 61800−5−1 or EN 60204−1!
Hot surface:
Use personal protective equipment or wait until devices have cooled down!

Motor protection

With some settings of the inverter, the connected motor can be overheated.
• E. g. by longer operation of self-ventilated motors at low speed.
• E. g. by longer operation of the DC-injection brake.
Protection of the machine/system
Drives can reach dangerous overspeeds.
• E. g. by setting high output frequencies in connection with motors and machines not suitable for this pur-
pose.
• The inverters do not provide protection against such operating conditions. For this purpose, use addi-
tional components.
Switch contactors in the motor cable only if the controller is inhibited.
• Switching while the inverter is enabled is only permissible if no monitoring functions are activated.
Motor
If there is a short circuit of two power transistors, a residual movement of up to 180°/number of pole pairs
can occur at the motor! (For 4-pole motor: residual movement max. 180°/2 = 90°).
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