Trafox SUPERINTEND IM-04DCCT, Инструкция по установке и эксплуатации

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USE
GENERAL
The Superintend IMD system for DC charging station based on the IM-04DCCT unit
includes the following components:
• The IM-04DCCT unit is the central unit of the system. It performs the
measurements independently and controls the alarm relays. The IM-04DCCT unit
is installed in the switchboard.
• The HVC-10 unit is a high voltage coupling device. It is needed between the IM-
04DCCT and the network to be monitored. The HVC-10 unit is installed in the
switchboard.
IM-04DCCT UNIT
The IM-04DCCT unit is the central unit of the system. The IM-04DCCT contains the user
interface of the entire system. The error notifications are displayed on the screen of the
IM-04DCCT, and the fault information can be forwarded to another user-defined system
through the alarm and pre-alarm relays. All alarm parameters are set through the user
interface of the IM-04DCCT system.
Measurement values can be monitored and settings can be changed using the Modbus
RTU protocol via the IM-04DCCT
unit’s RS -485 connection. For this purpose, the device
must be connected to a RS-485 bus and the Modbus address must have been configured
in the Setup menu.
The IM-04DCCT unit independently measures the insulation resistance and capacitance
of the IT network to be monitored, in relation to protective earth. The measurement is
performed by feeding two summed low frequency alternating voltages between the
network and the PE conductor. These generate a low current that travels through the
insulation resistance and capacitance to be measured. The insulation resistance and
capacitance are calculated by FFT analysing the current and then measuring the
amplitude and phase.