Omron K2CM Series Manual

Motor Protective Relay
K2CM
Solid-state Relay Enables Choice of Three
Operating Functions (Overcurrent, Open-
phase, and Reverse-phase)
• Protects 3-phase induction motors and their loads from damage.
• Selection and combination of operating functions from overcur-
rent, open-phase, and reverse-phase.
• Circuit and output relay operation can be checked by just operat-
ing the test button.
• The set time value can be checked easily because operation time
is indicated from the start of operation.
• Space-saving, integrated construction.
Note: If the K2CM is used with an inverter, the operating conditions will
depend on the load wiring length, inverter carrier frequency, basic
frequency, and load conditions. Error will occur in the operating
values of the overload elements. It is recommended to test operation
before using the K2CM.
Model Number Structure
■ Model Number Legend
K2CM-@@@-@@
1 2 3 4 5 6
1. Model
K2CM: Motor relay
2. Mounting style
None: Surface-mounting, integrated type
3. Operating time characteristics
None: Inverse type
Q: Instantaneous type
4. Supply voltage of control circuit
1: 100/110/120 VAC
2: 200/220/240 VAC
4: 400/440 VAC
Ordering Information
■ List of Models
Voltage Reverse-phase Detection Models
Time specification
Resetting
Current setting range
method
Operating voltage
Manual 200/220/240 VAC
Automatic 200/220/240 VAC
Inverse type
8 to 26 A 20 to 65 A
K2CM-2LV K2CM-2MV
K2CM-2LAV K2CM-2MAV
5. Current setting range
LS: 2 to 8 A
L: 8 to 26 A
M: 20 to 65 A
H: 50 to 160 A
6. Operating time
None: ×1 (2 to 10 s)/ ×4 (8 to 40 s) Switchable
7. Resetting method
None: Manual reset
A: Automatic reset
8. Reverse-phase detection type
None: Current reverse-phase detection
V: Voltage reverse-phase detection
50 to 160 A 8 to 26 A
K2CM-2HV K2CM-Q2LV
K2CM-2HAV K2CM-Q2LAV
CSM_K2CM_DS_E_6_3
Instantaneous type
20 to 65 A 50 to 160 A
K2CM-Q2MV K2CM-Q2HV
K2CM-Q2MAV K2CM-Q2HAV
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