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When the unit is used for a circuit of 440 V or more, use a potential transformer without fail. Connect
the secondary side of the potential transformer to the terminals P1 to P3.
Pass the secondary side (5 A) of the current transformer through EMU2-CT5 (-4W).
As the current transformer, a general current transformer for 5 A can be used.
It is recommended to connect protective devices (breakers or fuses) to the auxiliary supply voltage
input (terminals MA and MB) and the voltage input circuit (terminals P1, P2 and P3) for maintenance
to change the wiring or replace a device.
■ Extension of current sensor cable
The current sensor cable EMU2-CB1-DR/EMU2-CT5 (-4W) can be extended in accordance with the following procedures.
◆ Extension with current sensor extension cable EMU2-CB-T**M (standard type)
Brown
White
Blue
White
◆ Extension with current sensor extension cable EMU2-CB-T**MS (separate type)
1) Disconnect the connectors.
Brown
White
Blue
White
2) Connect the extension cables.
Brown
White
Blue
White
■ Fitting of EMU2-CT5 (-4W)
Fit the sensor to the cable of the circuit to be measured in accordance with the following procedures.
1) Slide the lock pin in the arrow direction.
2) Pass the electric wire into the clamp, and
close the clamp.
3) Push the lock pin until it is locked while
keeping the clamp with fingers in the fully
closed state.
The lock pin is a metallic part. Touching a live part may cause electric shock, unit failure or fire.
The cores may be damaged by shock. The damaged cores affect directly the unit performance.
Take care not to give shock to them.
Even minute particles between core mating surfaces affect directly the performance (lower
measurements may be obtained). Check the surfaces carefully.
If undue force is applied to the open clamp, the clamp may be damaged. If the clamp is set in a
wrong direction, normal measurement cannot be performed.
To secure the through electric wire and the sensor, use tying bands 2.6 mm or less in width. To
secure them, pass each tying band to one of the current sensor locking holes. Lightly tie the bands.
Take care not to tighten the bands excessively. (The current sensor has four locking holes in all on both sides.)
EMU2-CB1-DR
EMU2-CB1-DR
EMU2-CB-T**MS
Caution
(9/32)
Supplementation -----------------------------
For EMU-CT50, EMU-CT100, EMU-CT250, EMU-CT400
and EMU-CT600, the cable length can be extended to up
to 50 m (the total wiring length is up to 50.5 m).
For EMU2-CT5 (-4W), the cable length can be extended
to up to 10 m (the total wiring length is up to 10.5 m).
Use EMU2-CB-T**MS when the side 1 is installed at a
distance from the side 3.
Lock pin
ロックピン
Primary conductor (cable)
一次導体（ケーブル）
クランプ
コア
Cores
Breakers or fuses
ブレーカもしくはヒューズ
P1
P2
P3
MA
MB
EMU2-CB-T**M
Clamp
結束バンド
Tying band
固定用穴
Locking hole
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