K2CM-1L Omron, K2CM-1L Datasheet - Page 15

• Manufacturer Part Number: K2CM-1L
• Description: RELAY MOTOR PROTECTIVE 8-26A
• Manufacturer: Omron
• Series: K2CMr

Specifications of K2CM-1L

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: K2CM1L

■ Maintenance and Inspection
The K2CM Motor Protective Relay offers very stable characteristics.
To maintain these characteristics for a long time, the following
inspections are recommended.
Daily Inspection
The purpose of daily inspection is to discover causes of failure before
using the Motor Protective Relay. This inspection depends somewhat
on the perception of the operator as it includes visual checking, etc.
Periodic Inspection
This inspection is performed by turning OFF the power at regular
intervals to check the aging caused by long-time operation. It is rec-
ommended that periodic inspection is performed once a year.
Motor Protective Relay
External Rectifier
Check for adhesion of dust and foreign objects, damage to wirings by
burning, and loosening of mounting screws.
Connections
Motor Protective Relay Adhesion of foreign objects and dust to the
External rectifier
Construction
Operating characteristics
Insulation resistance
Operation check with test
button
Classification
Classification
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Loosening, damage, and dust collection at
screw terminals, damage to wiring insulation
sheaths, excessive force applied on wirings,
adhesion of foreign objects to terminal
screws
operation panel, shift of set value, indication
status of operation indicators and trip indica-
tor, presence/absence of front cover, loos-
ening of screws combining rectifier and
control circuits, deformation of case, abnor-
mal temperature on housing surface
Loosing of terminals, unusual odor, discolor-
ation of surface
Adhesion of dust and foreign objects to
terminals, cracks in insulators around
terminal block, burn damage to wirings,
damage to setting knobs, selector
switches, test button, and reset button,
damage to insulators of solderless ter-
minals, rust and discoloration of screw
terminals
Refer to Testing Method.
Between terminals and mounting panel
Checking of operating time, operation
indicators, and trip indicator
In the interest of product improvement, specifications are subject to change without notice.
Inspection items
Inspection item
Q
Q
Q
What is the VA consumption of the CT section?
The consumption is 0.4 VA/phase max. for any CT section.
What action is required if an inverter circuit is used?
As shown in the following figure, insert the K2CM and turn
OFF the reverse-phase switch before using the K2CM.
• Always insert the K2CM on the secondary side (load side)
• Error may occur in the operating values depending on the
• Using a K2MR is recommended to protect the inverter
What action is required if single phase is used?
The following describes the operating procedure for using a
single phase with the K2CM.
• Connection Method
• If a single phase is used, set the open-phase and reverse-
• Do not apply control power supply voltage between the V-
of the inverter.
inverter specifications and settings. Set the values after
performing tests and confirming operation.
motor.
Pass wires through any two of the three holes on the
K2CM.
phase switch to OFF. Make the overload settings so that
they match the motor current.
W terminals if a model with voltage reverse-phase
detection is used.
Element
Overcurrent
Open-phase
Reverse-phase
Inverter
Mounting
location
Q & A
K2CM
NG
NG
NG
Inverter power
K2CM
supply
Motor
M
Motor
M
OK
OK
NG
Inverter load
K2CM
15