5
Electrical installation
Special aspects for operation with a frequency inverter
Operating Instructions – EDR..71 – 315, EDRN63 – 315
59
5.6.2
Protecting the motor protection devices against interference
Adhere to the following points to protect motor protection devices by
SEW‑EURODRIVE against interference:
•
You may route separately shielded supply cables together with switched-mode
power cables in one cable.
•
Do not route unshielded supply cables together with switched-mode power lines in
one cable.
5.7
Special aspects for operation with a frequency inverter
When motors are powered from inverters, you must observe the wiring instructions is-
sued by the inverter manufacturer. It is essential to observe chapter
"
91) and the operating instructions of the frequency inverter.
If a drive has an earth leakage current higher than AC or DC 10 mA on a line connec-
tion, one or more of the following requirements must be met for the protective earth
system:
•
The PE must have a minimum cross section over its entire length of 10 mm
2
with
copper or 16 mm
2
with aluminum.
•
Where the PE has a cross section of less than 10 mm
2
with copper or 16 mm
2
with
aluminum, a second PE with at least the same cross section is required to the
point where the PE has a cross section of not less than 10 mm
2
with copper or
16 mm
2
with aluminum.
The drive might need to be equipped with a separate connection for a second PE.
25896334/EN – 06/2019