Pilz PMCprotego D.72/000/0/0/2/208-480VAC - Manual (Page 38)

4.2 Power element
4 Function Description
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
4-4
Connection via isolating transformer
 400 – 480 V mains supplies without earthed star point (asymmetrically
earthed or unearthed mains supplies), see Fig. (7) – (11)
Requirements for isolating transformers
 An earthed star point must be available on the secondary side. The
star point on the secondary side must be earthed and must be con-
nected to the servo amplifier's protective earth conductor. This will
prevent overvoltages between the external conductors and the servo
amplifier housing.
 The isolating transformers must have the relevant input and output
voltages.
Netzdrossel
Line choke
][Funktion_Netzspannung_Drossel
][Funktion_Netzspannung_Anschluss_protego_D
The following illustration shows the connection types.
INFORMATION
A 3L line choke with u
k
= 2% must be used in the event of a
mains voltage imbalance of > 3%. Install the line choke on the
mounting plate in a way that is EMC-compliant.