SIGMATEK MDD 111-1, Manual

Page: 22 / 84

MDP 102-1
Page 22 29.08.2019
3 Installation
3.1 Important instructions
•
If a leakage current sensor is used in the mains supply of the servo
drives, a leakage current sensor RCD type B has to be used in any
case. If a RCD type A or AC is used, there is a risk, that the DC
ground current of the servo drive inhibits the leakage current sensor.
High-frequency leakage currents occur, which must be taken into con-
sideration when selecting the FI (e.g. Schrack ID-B 4/XX/XX-B). Trig-
ger diagram:
•
Take care, that the servo drive and the motor are grounded properly.
Use uncoated, zinc plated mounting plates (subplates).
•
The servo drive system MDD 100 has a high leakage current higher
than 3.5 mA. Therefore particular attention has to be taken on the
grounding of the servo drive system:
a) Stationary machine mains supply connection:
–
Parallel connection of the protective conductor
on X2/Pin4 and at the module carrier with the same
gage wire size, or
–
Ground the MDD 100 with a minimum wire size of
10 mm² (AWG 8) at the module carrier, or
–
Automatically switch-off of the mains supply
at cable break of the protective conductor