Lenze SDSGA - Manual (Page 20)

Electrical installation 5
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20 BA 13.0008 − EN 2.1
5 Electrical installation
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Danger!
ƒ Electrical connection must only be carried out by qualified personnel!
ƒ Connections must only be made when the equipment is de−energised!
Danger through unintended starts or electric shocks.
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Stop!
It must be ensured that the supply voltage corresponds to the voltage
indicated on the nameplate.
Voltage supply
ƒ Inverter−optimised motors
– must be supplied by inverters.
– connect the encoders mounted to the motor with the corresponding connections
of the inverter.
ƒ Holding brake (as option)
ƒ Follow the Operating Instructions for the inverter used to connect it.
Cable cross−sections
ƒ Select appropriate connection cables to avoid impermissible heating (DIN
57100/VDE 0100 T523).
ƒ When extremely long cables are used, we recommend to use the next cable cross
section up to reduce the power losses. Observe the minimum cross sections to DIN
VDE 0298−4.
ƒ Establish the electrical connection as shown in the circuit diagram attached to each
motor. The circuit diagrams for the standard designs can be found in chapter 5.2.2.
Motor protection
ƒ The motor cable cannot be protected by temperature monitorings or PTC thermistors
in the motor winding:
– Take measures to DIN 57100 / VDE 0530.
ƒ The inverter changes current and voltage such that the output current can be
considerably higher than the input current. The motor cable cannot be protected via
the mains input fuses of the inverter:
– Take measures to DIN 57100 / VDE 0530.
ƒ Ensure careful earthing of the motor housing!
– If the motor is inverter driven, high−frequency voltages may be capacitively
transferred to the motor housing.