Protective Measures - HEIDENHAIN TNC 410 M Technical Manual

4.3.7 Protective Measures

General
Compact Inverters
UE 1xx
UE 2xx
UE 2xxB
Regenerative
inverter systems
Motors
4 – 16
Keep a minimum distance of 20 cm from the control and its leads to
interfering equipment.
A minimum distance of 10 cm from the control and its leads to cables that
carry interference signals. For cables in metallic ducting, adequate
decoupling can be achieved by using a grounded separation shield.
Shielding according to EN 50 178.
Use potential compensating lines with a minimum cross section of 10 mm
Use only genuine HEIDENHAIN cables, connectors and couplings.
Use HEIDENHAIN covers for the ribbon cables between the inverter units
in modular inverter systems.
Integration of toroidal cores in the motor leads (X80 to X84).
Integration of one toroidal core in the voltage supply lead (X31).
Only UE 21x: Integration of toroidal cores in the braking resistor leads.
These measures serve to suppress conducted interference (power line
disturbance according to EN 55011 / 55022 Class A). The toroidal cores are
included in the items supplied with the compact inverters.
A suitable HEIDENHAIN commutating reactor must be used.
A line filter from HEIDENHAIN must be used.
We recommend that you use a HEIDENHAIN three-phase capacitor to
ensure additional interference suppression if you are using a line filter.
Note
High-frequency disturbances in the power line may occur with other
commutating reactors or line filters.
If the described EMC protective measures are taken, the HEIDENHAIN
motors can be operated with cable lengths up to 15 m. If greater cable
lengths are required, it might be necessary to take additional measures for
interference suppression.
The shield of the line for the holding brake is to be kept as close as possible
(< 30 mm) to ground. The best solution is to fasten the shield with a metal
clamp directly onto the sheet-metal housing of the electrical cabinet.
HEIDENHAIN Technical Manual for Inverter Systems and Motors
2
.