Lenze EY System cables and system connectors - Manual (Page 25)

Product description
System cables
Dimensioning of the motor cables
2
l
25 EDSYPFLD EN 8.0
Dimensioning basics
The cable cross−sections have been assigned to the permissible current loading of the
motor cables under the following conditions:
ƒ Standards and operating conditions
– Compliance with IEC/EN 60204−1 for fixed cable installation
– Compliance with IEC 60354−2−52, table A.52−5 when using the cable in a trailing
cable
– Laying system C
– Ambient temperature 45 °C
ƒ Combination with servo motors
– Continuous operation with standstill current I
0
ƒ Combination with three−phase asynchronous motors
– Continuous operation with rated current I
r
– Interconnection of the motor
The system cables are assigned to the star or delta connection methods. If the
connection method is not known, always the system cable assigned to the delta
connection must be selected.
The symbols behind the reduced motor product key have the following meaning:
Symbol Meaning Inscription on the
motor Voltages / frequency designation of the mains
on which the motor can be actuated
* Star connection
* / - 400/230 V
400 V / 50 Hz
480 V / 60 Hz
- Delta connection 230 V / 50 Hz
277 V / 60 Hz
400 V / 87 Hz (only possible with a frequency
inverter)
-/400 Delta connection/400 V - 400 V 400 V / 50 Hz
480 V / 60 Hz
)
Note!
If the operating conditions deviate from the dimensioning basics, the user is
responsible for using a motor cable that meets the requirements to the
current circumstances.
Deviations can for instance be:
ƒ Laws, standards, national and regional regulations
ƒ Type of application
ƒ Motor utilisation
ƒ Ambient and operating conditions
ƒ Laying system and bundling of cables
ƒ Cable type