K2CM-Q4MA Omron, K2CM-Q4MA Datasheet
![no-image](/images/manufacturer_photos/0/4/494/omron_sml.jpg)
K2CM-Q4MA
Specifications of K2CM-Q4MA
Related parts for K2CM-Q4MA
K2CM-Q4MA Summary of contents
Page 1
... 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 ...
Page 2
... High: 35 ±10%; Low: 60% min. (at overcurrent operating value) where Imbalance factor = Reverse phase portion Normal phase portion K2CM Instantaneous type 160 A K2CM-Q1L K2CM-Q1M K2CM-Q1H K2CM-Q2L K2CM-Q2M K2CM-Q2H K2CM-Q4L K2CM-Q4M K2CM-Q4H K2CM-Q4LA K2CM-Q4MA K2CM-Q4HA Secondary power consumption × 100 (%) 2 ...
Page 3
... Destruction Hz, 2-mm double amplitude ( and Z directions for 2 hours each) 2 Malfunction: 98 m/s (approx and Z directions 2 Destruction: 294 m/s (approx and Z directions Set time value Approx. ±30% of the maximum setting value Electrical: 10,000 operations Operating: − °C (with no icing) − °C Storage: 35% to 85% 2,000 m max. K2CM 3 ...
Page 4
... N·m.) • Use of insulated solderless terminals is recommended for connection to the Relay terminals (M3.5). Note principle, the K2CM must be surface mounted with the terminal block facing downward. 2. Use M5 screws with spring washers and flat washers for mounting. Tighten the screws to a torque of 1.77 N·m max. (The appropriate tightening torque is 1.08 to 1.57 N· ...
Page 5
... N·m.) • Use of insulated solderless terminals is recommended for connection to the Relay terminals (M3.5). Note principle, the K2CM must be surface mounted with the terminal block facing downward. 2. Use M5 screws with spring washers and flat washers for mounting. Tighten the screws to a torque of 1.77 N·m max. (The appropriate tightening torque is 1.08 to 1.57 N· ...
Page 6
... Output Circuits ■ Internal Circuit and Operation Description Inverse and Instantaneous Types shown on the right, the K2CM detects abnormalities in motor M by checking its line current. The S 2 motor’s current signal is detected by the current transformer and is processed separately for each phase and input to the respec- tive circuits ...
Page 7
... Output of the maximum value detecting circuit is divided and used as reference values for comparison with the output of the rectifier/ smoothing circuits for the respective phases phase has a value lower than the reference value, the K2CM judges open-phase and outputs an open-phase signal. The following imbalance factors can be selected by setting the open- phase switch. “ ...
Page 8
... For exam- ple, the current setting range of the K2CM-@@ when the wires are passed only once. This range when the 2 8 wires are passed twice ...
Page 9
... Since the indicator status is not stored in memory when the opera- tion power supply is turned OFF, be sure to check which indicators were illuminated when the motor circuit was tripped. The functions of the K2CM can be used in the following seven combi- nations. For each function, turn ON the corresponding setting switch. Function ...
Page 10
... This graph shows the behavior when the current changes from 100% of the current-setting value to the percentage 0.5 shown on the horizontal axis. 0.4 0.3 0.2 0.1 0 100 200 300 400 500 Motor current (percentage of current-setting value) K2CM 600 700 600 700 10 ...
Page 11
... Three, 20-dia. holes Operating Procedures ■ Operation, Setting, and Indication Based on the current value of the motor to be used, perform the setting of each item of the K2CM Motor Protective Relay. List of Current Settings (when using a 200-VAC motor) Type* Number of passes Setting Time scale value ...
Page 12
... Turn ON SW1 and SW2 again and wait 2 seconds mini- mum. 3. Using the voltage regulator, abruptly increase the current to 140% of the set current value. Confirm that the K2CM performs instantaneous operation. 4. Turn OFF SW1 and SW2. 1. Open (disconnect) any one of the input phases for the cur- rent transformer ...
Page 13
... Turn OFF SW1 and SW2. Reverse-phase 1. Change the phase sequence to reverse-phase by switch- ing the U and W input terminals of the K2CM as shown by the dotted lines. 2. Turn ON SW1 and SW2 and confirm that the K2CM oper- ates. 3. Add a three-phase voltage regulator to the U, V, and W ter- minal inputs ...
Page 14
... When a power failure occurs in the control power supply, the K2CM is not reset even when the reset switch is pressed. This is not an error. The K2CM can be reset only when control power is applied to it. • Be sure to remount the front cover after detaching it for operating or setting the switches on the front panel. • ...
Page 15
... Q What is the VA consumption of the CT section? The consumption is 0.4 VA/phase max. for any CT section. Q 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. Inverter K2CM Motor • Always insert the K2CM on the secondary side (load side) of the inverter ...
Page 16
... Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. WARRANTY OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS ...