Isolating Transformer - Pilz PMCtendo DD5 Operating Manual

6 Wiring
6.3 Wiring guidelines
6.3.1.3

Isolating transformer

6- ][Verdr_Schutztrenntransformatoren Isolating transformer
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
For a general rule of thumb for determining leakage current, please see
the section entitled "Leakage current".
Fault current measurement on the FI
Fault current Protection
10 - 30 mA Protection against "indirect contact" (personal fire protec-
tion) for stationary and mobile electrical work equipment, as
well as "direct contact".
50 - 300 mA Protection against "indirect contact" (personal fire protec-
tion) for stationary electrical work equipment
INFORMATION
Recommendation: For protection against direct contact (with
motor cable runs < 5 m), we recommend that each servo ampli-
fier is protected individually using a 30 mA universal current sen-
sitive residual current device.
Selective FI residual cu rrent devices will stop the protective device being
triggered inadvertently.
The servo amplifier can also be operated via an isolating transformer
when:
Protection against indirect contact is absolutely essential, despite a

higher leakage current
An alternative method of contact protection is sought.

For details of how to connect the isolating transformer, please see the
section under "Wiring".
INFORMATION
We recommend that the cables between the transformer and the
servo amplifier be kept as short as possible.
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