Omron K6CM User Manual page 94

4 Installation and Wiring
Wiring Diagram of the Insulation Resistance Type (K6CM-ISM)
 Three-phase Three Wire S-phase Grounded Delta Connection (With Inverter)
R
3 phase
S
voltage
T
fuse
Single phase
power supply
Computer,
PLC etc.
LAN
With the above wiring, set 0 for the Applicable circuit and 1 for the Using inverter of the K6CM-ISM
Inverter special measurement setting changes according to inverter frequency (finv).
Example) When the commercial frequency f = 50 H
Method (1)
46 Hz
Method (1) (finv ≤ f - 4 Hz, f + 4 Hz ≤ finv)
• Inverter special measurement:
Method (2) (f - 0.2 Hz ≤ finv ≤ f + 0.2 Hz)
• Inverter special measurement:
• Switch the Inverter special measurement to 1 (ON) when the measured value falls
below 0.5 MΩ. Measurement with higher accuracy will become possible.
Note In the case of f - 4 Hz < finv < f - 0.2 Hz, f + 0.2 Hz < finv <f + 4 Hz
It can not be measured correctly. Do not use the K6CM device.
*1. For details on how to change the setting, refer to "Section 6 Insulation Resistance Type (K6CM-ISM) in 6-2-2
Other Setting Values on page 6-4,Section 7 Motor Monitoring and Operation with the K6CM Devices and the
Motor condition monitoring Tool, Section 8 Monitoring and Setting with the EtherNet/IP.
4 - 20
Earth
Red and White
1 7
Red
2 8
Black
9
DO NOT USE
Black and White
DO NOT USE 10
DO NOT USE
DO NOT USE
K6CM-ISM
13
Transistor Output
14
15
Transistor Output
16
17
EtherNet/IP
Transistor Output
LAN
18
Can not be
Method (2)
measured.
49.8 Hz
Inverter
L1 L2 L3
*1
IRT0
IRT1
K6CM-ISZ
FG
IRT2
(ZCT(IRT))
IRT3
*1: According to IEC 60364 TT method
PLC etc.
PLC etc.
PLC etc.
Can not be
measured.
50.2 Hz 54 Hz
Set to 0 (OFF) and start measurement.
Set to 0 (OFF) and start measurement.
K6CM Motor Condition Monitoring Device User's Manual (N219)
Zero phase current transformer
(Part of K6CM-ISZ)
Monitor target
(motor etc.)
*1
Method (1)
[Hz]
finv
.