Omron KE1-CTD8E, User Manual

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0BPreparation
2-12
Preparation Preparation
2.3 Installation of dedicated CT 2.3 Installation of dedicated CT
The dedicated CT is divided into the two types: split type and panel fixed (through) type. The dedicated CT is divided into the two types: split type and panel fixed (through) type.
[Common]
[Common]
x
Measurement with single-phase 2-wire requires one dedicated CT, measurement with
single-phase 3-wire or 3-phase 3-wire requires two dedicated CTs, and measurement with
3-phase 4-wire requires three dedicated CTs.
x
Measurement with single-phase 2-wire requires one dedicated CT, measurement with
single-phase 3-wire or 3-phase 3-wire requires two dedicated CTs, and measurement with
3-phase 4-wire requires three dedicated CTs.
x
Use of dedicated CTs in a circuit requires all the CTs to have the same standard.
x
Use of dedicated CTs in a circuit requires all the CTs to have the same standard.
x
The standard of the dedicated CTs to be used should match the settings of the dedicated
CT of Model KM1.
x
The standard of the dedicated CTs to be used should match the settings of the dedicated
CT of Model KM1.
x A dedicated CT has its polarity. Carry out wiring correctly between (K) and (L). x A dedicated CT has its polarity. Carry out wiring correctly between (K) and (L).
For terminal positions, refer to Page 2-14 and later. For terminal positions, refer to Page 2-14 and later.
x
Before making connections, confirm the directions of power supply side (K) and load side
(L). Wrong direction prevents correct measurements.
x
Before making connections, confirm the directions of power supply side (K) and load side
(L). Wrong direction prevents correct measurements.
x
Securely close the terminal cover on the secondary side of dedicated CT.
x
Securely close the terminal cover on the secondary side of dedicated CT.
x
Do not ground the dedicated CT. Doing so causes a failure.
x
Do not ground the dedicated CT. Doing so causes a failure.
x
Electric shocks may occur.
x
Electric shocks may occur.
For the primary side wire to be clamped in CT, be sure to use a covered electric wire of 600
V or more in basic insulation. For the primary side wire to be clamped in CT, be sure to use a covered electric wire of 600
V or more in basic insulation.
When using a conductive object, such as bus bar, for clamping, ensure the basic insulation
at least by, e.g., covering with an insulator.
When using a conductive object, such as bus bar, for clamping, ensure the basic insulation
at least by, e.g., covering with an insulator.
x
Avoid direct clamping in a line of 600 VAC or more.
x
Avoid direct clamping in a line of 600 VAC or more.
[Split type] [Split type]
x
Open the hook for the split/fixed type and clamp each phase. After clamping, securely
perform fitting until a clicking sound is heard.
x
Open the hook for the split/fixed type and clamp each phase. After clamping, securely
perform fitting until a clicking sound is heard.
[Panel fixing (through) type] [Panel fixing (through) type]
x
Securely fix the dedicated CT to the panel, etc.
x
Securely fix the dedicated CT to the panel, etc.
Split type Panel fixing (through) type Split type Panel fixing (through) type
電源側
(K)
負荷側
(L)
KM20
-CTF
････
･･
CT二次側
端子カバー
分割/
固定用フック
LOT N
o.
････
･･
L
K
結束バンド等
の固定用
電
(
)
源側
K)
負荷側
(Ｌ
Load side
(L)
Load side
(L)
Hook for
split/fixing type Loading
side (K)
Loading
side (K)
For fixing a banding
band, etc.
Terminal cover on the secondary
side of dedicated CT