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© Copyright Muuntosähkö Oy
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Trafox
Superintend IMD
SYSTEM DESCRIPTION
IM-04DCCT is a device with which the insulation resistance and capacitance of floating
electricity networks can be measured and monitored in DC charging station applications.
A high voltage coupling device HVC-10 is mandatory and it must be used between the
IM-04DCCT and the network to be monitored.
INSTALLATION
PHYSICAL CONNECTION
The devices are connected to the electrical network, which may contain
dangerous voltage. The device may be installed by a trained electrical
engineering professional only. The device contains no user-serviceable parts
and must not be opened. Using the device in violation of these instructions
may compromise safety.
The IM-04DCCT unit is the main unit of the system and is installed in the switchboard.
Two IM-04DCCT devices may not be installed galvanically in the same network, for
example on the same DC network. The connection is performed as presented in Figure 1.
The installation and wiring should be performed in accordance with standards IEC 60364
as well as EN 50110. The operating voltage connection of IM-04DCCT must always be
equipped with a coupler or a line protection switch so that the electricity supply can be
disconnected for the duration of maintenance work, for example. The location of the
disconnectors must be clearly marked in the switchboard. The coupler or line protection
switch should also control a relay or contactor, which separates the measuring wires
from the network to be measured. The IM-04DCCT device is equipped with an internal 1
A fuse. In spite of this, the wires of the operating voltage supply should still be protected
with an external fuse. A suitable size is, for example, 6 A. In a DC operating voltage
supply, an external Schurter 0001.2503 (T800mA) fuse should be used.
DEVICE MOUNTING
The IM-04DCCT and HVC-10 devices are intended for installation in a DIN TS35 rail in
accordance with standard IEC 60715. They are installed by inserting the upper edge of
the DIN TS35 rail in the groove intended for the DIN TS35 rail on the back of the device
and by pushing the bottom edge of the device backward until the retaining latch clicks
into place.
The IM-04DCCT unit comes with the connections shown in the following table. The
shaded parts are optional and are installed as needed, while installing the other parts is
mandatory.
