Omron K6CM User Manual page 85

Connect the ZCT (IRT) to the Power Line of the Three-phase Power
Supply
Clamp to power line of three-phase power supply to diagnose ZCT (IRT).
When using an inverter, clamp it to the secondary side of the inverter.
ZCR (IRT) can be divided by removing screws at both ends.
When disassembling the ZCT (IRT), disconnect the signal line connected to the L terminal as shown in
the diagram below.
After assembling the ZCT (IRT), connect the signal line to the L terminal again. (Tightening torque is
0.75 ± 0.15 N•m.)
Be careful not to mistake the direction of L (load side) and K (power supply side) in the through hole.
Screw
Precautions for Correct Use
Do not ground the K and L terminals in ZCT (IRT). It is already connected to FG in the internal
circuit.
Ground the FG terminal of ZCT (IRT). If you do not ground it, the measurement accuracy will be
worse.
ZCT (IRT) Wiring Diagram
K6CM Motor Condition Monitoring Device User's Manual (N219)
Power line
Disconnect the
L
signal line once.
K
FG
Earth (*1)
R S T (3 phase 3 wire S-phase ground)
White
Red
Black
CAT
k
ZCT (IRT)
l
Load side (L)
4 Installation and Wiring
Power line
L
Tightening torque is
K
0.75 ± 0.15 N·m.
FG
Earth (*1)
*1 According to IEC 60364 TT method.
Red and White
Red
K6CM-ISM
Black
Black and White
4
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