Fitting Of Emu-Ct50/Ct100/Ct250; Fitting Of Emu-Ct400/Ct600 - Mitsubishi Electric EcoMonitorPro EMU2-RD3-F Instruction Manual

■ Fitting of EMU-CT50/CT100/CT250

Fit the sensor to the cable of the circuit to be measured.
1) Open the moving core as shown right.
Slowly lift the moving core locking claws on both sides of the moving core to open and remove
them from the stoppers. Do not open the core forcibly. Doing so may break the claws.
2) Insert the cable from beneath taking care not to bring the cable into contact with the core
parting faces. Before inserting the cable, check the symbols K and L to fit the current sensor in
the correct direction. (The direction from the power supply side to the load side is indicated
with .)
3) After checking that the core parting faces are free from dirt, close the
moving core. Push up the moving core until the stoppers are
securely locked. (When the moving core securing claws on both
sides catch on the stoppers, you hear two clicks.)
4) Pass the tying bands into the current sensor locking holes to secure
the sensor with the cable. Lightly tie the band. Take care not to
tighten the bands excessively. (The current sensor has four locking
holes in all on both sides.)
5) Cut off the residual parts of the tying bands with nippers appropriately.
6) Remove the protective cover of the secondary terminal lifting the center of the protective cover,
and connect the specified sensor cable. Check the terminal symbols shown on the
secondary terminal surface, and take care not to connect the cable incorrectly.
Supplementation ----------------------------------------------------------------------------------------------------------------------------------------------------------------
When opening the moving core of the split type current sensor, do not open the moving core locking claws excessively. Doing so
may damage the moving core locking claws.
The applicable electric wire size is shown below.
IV wire
Applicable wire
size (reference)
CV wire

■ Fitting of EMU-CT400/CT600

Fit the sensor to the cable of the circuit to be measured in accordance with the
following procedures.
1) Remove the band ○
in the arrow (upward) direction, and remove the core
1
cover.
2) Remove the terminal cover, and set the secondary short-circuiting switch to
"Short."
3) Loosen the screw ○
, open the core band, and remove the core. Take care
2
that dust does not adhere to the core.
4) Loosen the screws ○
, and fit the main body onto the cable. Then, tighten
3
the screws ○
to secure the cable using the cable direct fitting. Tighten the
3
screws to such an extent that the direct fitting is not bent.
5) Set "K" on the removed core and "K" on the main body on the same side,
return the core as it was, and tighten the core band with the screw ○
6) Fit the core cover, and secure it with the band ○
7) After connecting the secondary terminal and the multi-circuit power
measuring unit, set the secondary short-circuiting switch to "Open," and fit
the terminal cover.
Supplementation ----------------------------------------------------------------------------------------------------------------------
Before passing the cable, ensure that the current sensor is fitted in the correct direction. Current flows from K to L.
K: Power supply side
L: Load side
EMU-CT50 EMU-CT100
2 2
60 mm or less 60 mm or less
2 2
38 mm or less 38 mm or less
.
1
These applicable electric wire sizes have been
determined based on the values shown on the
EMU-CT250
catalogs of general vinyl-coated wires. The wire to
2
150 mm or less be used may have a different sheath thickness.
2
Check whether the wire to be used can be passed
150 mm or less
through the sensor referring to the drawing of
external dimensions of the product.
Core band
Cable direct fitting
.
2
Primary conductor
(10/32)
Protective cover
保護カバー
可動コア
Moving core
固定づめ
locking claw
Moving core 可動コア
一次導体 Primary
conductor
(ケーブル)
(cable)
可動コア分割面
ストッパ Stopper
固定用穴
Locking hole
(3×2)
(3×2)
Direction of
電流の方向
current
Locking hole
結束バンド
○ 1
Core cover
○ 2
Core
Terminal cover
○ 3
Secondary terminal
Secondary
Short-circuiting switch
Primary current
Moving core
可動コア
locking claw
固定づめ
Moving core parting face
固定用穴
Locking hole
(3×2) (3×2)
一次導体
Primary
(ケーブル)
conductor
結束バンド Locking hole