MDP 101-1
05.06.2020 Page 33
3.3.7 MDP 101-1 Mains Supply Options
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
b) Variable machine mains supply connection:
Mains connection with industry connector according to EN 60309
and a minimum wire cross section of the protective conductor of 2.5 mm²
(AWG 13) as part of a multi-conductor supply cable. Use an adequate pull
relief.
If a leakage current sensor is used in the mains supply of the servo drive
system, a leakage current sensor RCD type B must be used.
If a RCD type A or AC is used, there is a risk, that the DC ground current of
the servo drive will inhibit the leakage current sensor.
Grounded mains The power supply module can be connected directly to mains with
grounded star point or grounded phase conductor in the defined
voltage range without galvanic isolation.
Ungrounded mains If the power supply module is connected to ungrounded mains (IT-
system), there is a risk of damaging the drive by unacceptable over
voltages.
The servo drive can be protected against over voltage by
• Using a galvanically isolated transformer with a
grounded star point on the secondary side. This
guaranties the highest level of protection.
• Installing a surge protection unit in the input of the
switchgear cabinet
The servo drive is tested according to EN 61800-3 with following
levels:
• The periodic over voltage at the mains input L1, L2,
L3 between the phases and against ground must not
exceed 1000 V (peak value).
To Next Page
Loading...
Need help?
General