12 Installation Guide
www.johnsoncontrols.com Issue Number: 2
Figure 4-2 Control connections
4.2 Ground leakage
The ground leakage current depends upon the internal EMC filter being installed. The drive is
supplied with the filter installed. Instructions for removal of the internal EMC filter are given in
section 4.3.2
With internal EMC filter installed:
3 phase 200V drive: 7.8mA ac maximum at 220V, 50Hz (proportional to supply voltage and
frequency)
3 phase 400V drive: 10.4mA ac maximum at 400V, 50Hz (proportional to supply voltage and
frequency)
With internal EMC filter removed <1mA
Fuses/MCB
The AC supply to the drive must be installed with suitable protection against overload
and short circuits. Failure to observe this requirement will cause risk of fire.
The drive must be grounded by a conductor sufficient to carry the prospective fault
current in the event of a fault. See also the warning in section 4.2 Ground leakage
relating to ground leakage current.
The above leakage currents are just the leakage currents of the drive with the internal
EMC filter connected and do not take into account any leakage currents of the motor or
motor cable.
There is an internal voltage surge suppression device connected to ground. Under
normal circumstances, this carries negligible current.
When the internal EMC filter is installed, the leakage current is high.
In this case, a permanent fixed ground connection must be provided.
(no connection)
T3 Fault output (F)
T4 Fault return (FR)
T5 PWM control return (CR)
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