Mitsubishi Electric MELSEC iQ-R Series User Manual page 109

Section 6 SETTING AND PROCEDURE FOR OPERATION
■ How to attach EMU-CT50/CT100/CT250
Follow the procedure below to attach to the cable of the target circuit.
(1) Open the movable core, as shown in the figure on the right.
Lift slowly the hooks located on both sides of the movable core,
and detach them from the stopper. Do not force to open it. You
may break the hook.
(2) Do not let the cable touch on the core-spilt surface. Thus, carefully
pass the cable from underneath. Before passing the cable, check
the direction symbols of K and L, in order
to attach the sensor in the correct
orientation. (Direction from power source
side (K) to load side (L) is indicated with
the arrow.)
(3) Make sure no dust or foreign object is
attached on the split-core surface, and after that, close the movable core. Lift the movable core until the
stoppers are firmly locked. (When the hooks on both side of movable core are locked to the stoppers,
you will hear click sound twice.)
(4) Put a binding cable through a hole for fixing the current sensor, and
then tie it with the cable. Do not tie it too tightly. (Holes for fixing the
current sensor are located on both side of the current sensor.)
(5) Cut off the extra portion of binding cable, using a nipper, etc, to avoid
interference of the cable.
(6) Lift a protective cover of the secondary terminal, by holding the center
portion of the protective cover, and remove it. And then, connect the
given sensor cable. Check the terminal symbols printed on the
secondary terminal surface, so that connection is performed correctly.
● When opening the movable core on current sensor, do not widen the hook for fixing the movable core
too much. It may break the hook.
● Refer to the table below for appropriate size of electric wires.
Usable wires
size (reference)
Note 1: The recommendation is 100mm
* Size of electric wires conforms to description in the catalog of general PVC insulated wires. Thickness
of external PVC insulation is different according to the wire. Check with the external dimension
diagram of this product and make sure the wire can go through the given space.
● Use insulation wire rather than basic insulation for the primary side cable of current sensor.
● Do not ground the secondary side of the current sensor.
EMU-CT50
IV cable 60 mm or less
2
CV cable 38 mm or less
2
2 .
Protective cover
Movable core
Fixing hook
Movable core
Stopper
Caution
EMU-CT100
60 mm or less
2
38 mm or less
2
108
RE81WH
Movable core
Fixing hook
Primary
conductor
(Cable)
Movable core split
surface
EMU-CT250
150 mm or less
2
150 mm or less (Note 1)
2