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Terms and Conditions Agreement 

 
Read and understand this catalog. 
Please read and understand this catalog before purchasing the products.    Please consult your OMRON representative if you 
have any questions or comments.     
 
Warranties. 
(a) Exclusive Warranty

. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship 

for a period of twelve months  from the date of sale by Omron (or such other period expressed in  writing  by  Omron).  Omron 
disclaims all other warranties, express or implied. 
(b)  Limitations.  OMRON  MAKES  NO  WARRANTY  OR  REPRESENTATION,  EXPRESS  OR  IMPLIED,  ABOUT 
NON-INFRINGEMENT,  MERCHANTABILITY  OR FITNESS FOR A  PARTICULAR PURPOSE OF  THE  PRODUCTS. BUYER 
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE 
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. 
Omron  further  disclaims  all  warranties  and  responsibility  of  any  type  for  claims  or  expenses  based  on  infringement  by  the 
Products  or  otherwise  of  any  intellectual  property  right.  (c)  Buyer  Re

medy.  Omron’s  sole  obligation  hereunder  shall  be,  at 

Omron’s  election,  to  (i)  replace  (in  the  form  originally  shipped  with  Buyer  responsible  for  labor  charges  for  removal  or 
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount 
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty, 
repair, indemnity or any other claims or expenses regarding the Products unless Omron

’s analysis confirms that the Products 

were  properly  handled,  stored,  installed  and  maintained  and  not  subject  to  contamination,  abuse,  misuse  or  inappropriate 
modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall 
not  be  liable  for  the  suitability  or  unsuitability  or  the  results  from  the  use  of  Products  in  combination  with  any  electrical  or 
electronic  components,  circuits,  system  assemblies  or  any  other  materials  or  substances  or  environments.  Any  advice, 
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above 
warranty. 
See 

http://www.omron.com/global/

    or contact your Omron representative for published information. 

 
Limitation on Liability; Etc. 
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, 
LOSS  OF  PROFITS  OR  PRODUCTION  OR  COMMERCIAL  LOSS  IN  ANY  WAY  CONNECTED  WITH  THE  PRODUCTS, 
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY. 
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted. 
 
Suitability of Use. 
Omron  Companies  shall  not  be  responsible  for  conformity  with  any  standards,  codes  or  regulations  which  apply  to  the 
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable 
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself 
is  not  sufficient  for  a  complete  determination  of  the  suitability  of  the  Product  in  combination  with  the  end  product,  machine, 
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product 
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.   
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE 
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, 
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE 
OVERALL EQUIPMENT OR SYSTEM. 
 
Programmable Products. 
Omron  Companies  shall  not  be  responsible  for  the  user’s  programming  of  a  programmable  Product,  or  any  consequence 
thereof. 
 
Performance Data. 
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining 
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate 
it to actual application requirements. Actual performance is subject to the Om

ron’s Warranty and Limitations of Liability. 

 
Change in Specifications. 
Product  specifications  and  accessories  may  be  changed  at  any  time  based  on  improvements  and  other  reasons.  It  is  our 
practice to change part numbers when published ratings or features are changed, or when significant construction changes are 
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers 
may be assigned to fix or establish key specifications for your application. 

Please consult with your Omron’s representative at 

any time to confirm actual specifications of purchased Product. 
 
Errors and Omissions. 
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is 

assumed for clerical, typographical or proofreading errors or omissions.

 

 

 

 

2018.7 

In the interest of product improvement, specifications are subject to change without notice. 

OMRON Corporation 

Industrial Automation Company 

 

http://www.ia.omron.com/ 

(c)Copyright OMRON Corporation 2018 All Right Reserved. 

Summary of Contents for K2CM Series

Page 1: ...ng the K2CM Model Number Structure Model Number Legend 1 Model K2CM Motor relay 2 Mounting style None Surface mounting integrated type 3 Operating time characteristics None Inverse type Q Instantaneou...

Page 2: ...AC 2 A 440 VAC 1 A 110 VDC 0 2 A 220 VDC 0 1 A Contact form of output contact Current reverse phase detection models SPST NO SPST NC Voltage reverse phase detection models SPDT Operating current range...

Page 3: ...Current reverse phase detection models 6 000 V between current carrying terminals and mounting panel 4 500 V between current carrying terminals and between control power supply terminals Waveform 1 2...

Page 4: ...Manual Operation High voltage Circuit Note Connect the phase advancing capacitor on the power supply side of the Motor Protective Relay as shown in the above dia grams Ta Tc Tb U V W Output contacts...

Page 5: ...t High capacity Motor Automatic Operation Low voltage Circuit Manual Operation High voltage Circuit S1 C2 b2 a1 c1 S2 Output contacts NO and NC Control power supply R S T BZ R U A 1 S V B 2 T W C 3 a1...

Page 6: ...ens of seconds to settle to the rated current This time varies largely depending on type of motor and the nature of motor load wt There fore it is necessary to obtain the motor s starting time for ope...

Page 7: ...required for the detection of inter nal open phases in delta connected motors Consult your OMRON representative before using this method When a transformer is con nected as a load the harmonics increa...

Page 8: ...n is released after the motor circuit has tripped the circuit remains tripped whereas with automatic resetting models the motor circuit continues operating and the output relay releases Deciding the N...

Page 9: ...is made at the load side far from the current transformer and the motor rotates in the re verse direction the K2CM does not detect the reverse phase Reverse detectable Range The OR phase circuit in th...

Page 10: ...aracteristics for Inverse Type Overload Operating Time Characteristics for Instantaneous Type 2 0 1 0 0 100 200 300 400 500 600 700 This graph shows the behavior when the current changes from 100 of t...

Page 11: ...ive motor full load characteristics of 200 VAC 4 pole totally enclosed Note When using a large capacity or high voltage motor whose capacity is 45 kW or more calculate the rated current alternating cu...

Page 12: ...the input phases for the cur rent transformer 2 Turn ON SW1 and SW2 Gradually increase the current by adjusting the voltage regulator 3 Confirm that the K2CM operates at a current no greater than 85 o...

Page 13: ...3 Using the voltage regulator abruptly increase the current to 140 of the set current value Confirm that the K2CM performs the instantaneous operation 4 Turn OFF SW1 and SW2 Open phase 1 Open disconn...

Page 14: ...ection of a high voltage motor or low voltage high capacity motor use an external rectifier that does not saturate at currents up to 600 of the rated motor current and thus permits a large overcurrent...

Page 15: ...ase with the K2CM Connection Method Pass wires through any two of the three holes on the K2CM If a single phase is used set the open phase and reverse phase switch to OFF Make the overload settings so...

Page 16: ...ther in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted Suitability of Use Omron Companies shall not be responsible for conformity...

Page 17: ...2CM 1LA K2CM 1LS K2CM 1M K2CM 1MA K2CM 2H K2CM 2HA K2CM 2L K2CM 2LA K2CM 2LS K2CM 2M K2CM 2MA K2CM 4H K2CM 4HA K2CM 4L K2CM 4LA K2CM 4M K2CM 4MA K2CM Q1H K2CM Q1HA K2CM Q1L K2CM Q1LA K2CM Q1LS K2CM Q1...

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