Insulation Resistance Monitoring Device K7GE-MG
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Insulation Resistance Monitoring Device Reliable, Safe and Accurate Automatic Insulation Resistance Measurements • Measures insulation resistance automatically when a trigger signal is input • Identifies the trend in insulation deterioration from the measurement data collected via communications • Conducts measurements safely with a Megger voltage of 50 VDC • Able to measure up to eight points simultaneously • Constantly monitors the voltage applied to the device targeted for measurement, and automatically stops measurement if the target device power is turned ON after measurement has started Refer to your OMRON website for the most recent information on applicable safety standards. Overview The K7GE-MG is a device that automatically measures the insulation resistance of a load and supports trend monitoring. Periodic inspections by manpower may cause a unexpected machine stoppage due to a decrease in insulation resistance of equipment before the next inspection. The K7GE-MG provides automatic monitoring of the insulation resistance of each load and allows planned maintenance. The K7GE-MG measures the insulation resistance by the same detection principle (Megger method) as a Megohmmeter. To measure the insulation resistance using the K7GE-MG, it is necessary to combine one Main Unit with at least one Probe Unit. The functions of the Main Unit and Probe Unit are shown in the figure on the right. The Main Unit correspond to a Megohmmeter, and the Probe Unit correspond to a measurement probe with internal contacts. The Main Unit turns ON these contacts in sequence and measure multiple loads individually. Up to eight Probe Units can be connected to one Main Unit. Main Unit Probe Unit Probe Unit

Ordering Information Main Unit Probe Unit Power supply voltage Accessories (Order Separately)

Communications Specifications

Front Section Main Unit K7GE-MGMProbe Unit K7GE-MG1 (N)

Main Unit K7GE-MGM K7GE-MG Operation power supply 11 2

Terminal Section Probe Unit K7GE-MG1

Connection Diagram When the Load Is a Single-Phase/3-Phase Induction Motor (Direct Connection to Commercial Power Supply) Install a contactor between the power line and the motor. Do not connect any other device such as a transformer or a filter between the contactor and the motor. Doing so may cause incorrect measurement. Connect the voltage input of the Probe Unit of the K7GE-MG to the secondary output terminal (motor side) of the contactor. Trigger input Make sure that it is not connected to the primary side (power supply side). It cannot be measured correctly and may cause a hazardous...

K7GE-MG When the Load Is a Servo Motor Install a contactor between the Servo Drive output and the motor. The contactor is required only in the power line. Relays the motor power cables other than the power line to the terminal blocks and connect it to the Servo Drive directly. Do not connect any other device such as a transformer or a filter between the contactor and the motor. Doing so may cause incorrect measurement. Connect the voltage input of the Probe Unit of the K7GE-MG to the secondary output terminal (motor side) of the contactor. Make sure that it is not connected to the primary...

Optional Products for DIN Track Mounting DIN Tracks PFP-100N PFP-50N

Operation Level wtPt + At least 3 seconds Initial Setting Level LVL 0 Maximum Number of Channels Communications Setting Level LVL I Less than 1 second PSLl Setting Change Protection Note: Power ON reset is a reset process that runs when the power turns ON. Software Version a Less than 1 second ♦la) Alarm Polarity Trigger Signal Reverse Motor Stop Waiting Time Time to Wait to Stabilize Average Processing Use Running Time Protocol Baud Rate Data Length Stop Bits Parity Send Wait Time Note: Bold text values indicate default settings.

K7GE-MG Logging Tool The K7GE-MG Logging Tool (this tool) makes it easy to perform remote monitoring. The main specifications of the tool are as follows: • Data for up to five sets of the monitoring device can be logged. • A maximum of eight Probe Units can be included in one set. • The measurement values and alarm status data for each set can be logged. Up to 1,000 values of data can be logged. • The setting parameters can be read and written. bBBBB oooo Probe Unit 8 Units max. The system requirements are as follows. Refer to Help in this tool for details on using this tool. You can...

• For wiring from the Probe Unit to the load, use a Class CC, Class J, or Class T fuse with a rated current of 7 A or less. • The protection provided by the device may be impaired if the device is used in a manner that is not specified by the manufacturer. • To use the Product, install it as an embedded device within a control panel. • The table below shows the nominal voltage and measurement circuit connections available for each measurement category in the Main Power Supply System Configurations. Do not use the device under conditions that exceed this category and conditions. Main Power...

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