Unidrive M300/HS30 Quick Start Guide 15
Issue Number: 7
4.3 Ground leakage
The ground leakage current depends upon whether the internal EMC filter is installed or not. The
drive is supplied with the filter installed. Instructions for removing the internal filter are given in
section 4.5.2 Removing the internal EMC filter on page 22.
With internal filter installed:
Size 1:
8.1 mA* AC at 110 V, 50 Hz
9.5 mA* AC at 230 V, 50 Hz
Size 2:
13 mA* AC at 110 V, 50 Hz (1 phase)
6.3 mA* AC at 230 V, 50 Hz (3 phase)
17.5 mA* AC at 230 V, 50 Hz (1 phase)
9.2 mA* AC at 415 V, 50 Hz (3 phase)
Size 3:
17.1 mA* AC at 230 V 50 Hz (1 phase)
5.9 mA* AC at 230 V 50 Hz (3 phase)
5.7 mA* AC at 415 V 50 Hz (3 phase)
Size 4:
21.3 mA* AC at 230 V 50 Hz (1 phase)
9.7 mA* AC at 230 V 50 Hz (3 phase)
13.3 mA* AC at 415 V 50 Hz (3 phase)
*Proportional to the supply voltage and frequency.
With internal filter removed:
Size 1: <1 mA
Size 2: 110 V: < 1.2 mA
230 V: < 1 mA
415 V: < 2.3 mA
Size 3: 230 V: < 1.6 mA
415 V: < 1 mA
Size 4: < 1 mA
The above leakage currents are just the leakage currents of the drive and do not take into
account any leakage currents of the motor or motor cable.
When the internal filter is installed the leakage current is high. In this case a permanent
fixed ground connection must be provided, or other suitable measures taken to prevent a
safety hazard occurring if the connection is lost.
When the leakage current exceeds 3.5 mA, a permanent fixed ground connection must be
provided using two independent conductors each with a cross-section equal to or
exceeding that of the supply conductors. The drive is provided with two ground
connections to facilitate this. Both ground connections are necessary to meet EN 61800-
5-1: 2007.
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