Overvoltage Protector - HEIDENHAIN TNC 410 M Technical Manual

4.1.9 Overvoltage Protector

April 2007
It may become necessary to insert an overvoltage protector in the supply
voltage path (preferably in front of the line filter) in order to protect the
inverters against overvoltage from the power line and against the resulting
overvoltage damage.
Notes for the connection see page 4 – 30.
HEIDENHAIN recommends using an overvoltage protector which limits the
voltage peaks from the power line to 2500 V.
Modules, such as the FLT-CP-3C-350 from the company Phoenix Contact, are
suitable for this purpose.
Note
If a machine is required to comply with UL requirements, an overvoltage
protector (such as mentioned above) must be inserted.
General Information
4 – 9