User manual OMRON K2CU DATASHEET

[. . . ] of the logical value, on condition that the voltage fluctuation is 85% to 110% of the control supply voltage. (at ±5% of rated frequency) 10 M min. (at 500 VDC) between electric circuits and mounting panel 2, 000 VAC, 50/60 Hz for 1 min between electric circuits and mounting panel 20 times of max. set value of operating current for 2 s Destruction: 16. 7 Hz, 1-mm double amplitude for 10 min each in X, Y, and Z directions Destruction: 100 m/s2 (approx. [. . . ] Phase Single phase 200 V Normal condition 5A Abnormal condition 0A 1 kW 200 V 5A 0A 7. 5 A 1 kW 1 kW 1 kW 5A 7. 5 A 8. 7 A 5A Three phase Delta network 200 V 8. 7 A 200 V 200 V 8. 7 A 8. 7 A (5 A x 3) (5 A x 3x 3 ) 2 (5 A x 3 x 2. 5 A 2. 5 A 1 ) 3 Star network 200 V 2. 9 A 200 V 200 V 2. 9 A 2. 9 A (5 A x 1 ) 3 1 kW 1 kW 1 kW 2. 5 A 2. 5 A (5 A x 1 x 3 2. 5 A 1 kW 1 kW 3) 2 (5 A x 1 x 3 5A 5A 3) 2 V network 200 V 5A 200 V 200 V 8. 7 A 5A 2. 5 A (5A x 1/2) (5A x 1) (5 A x 3 = 8. 7 A) Note: Values in this table are correct when a 200 VAC, 1 kW heater is used on a single-phase or three-phase current. 5 K2CU Operation Check K2CU-F A- GS The operation of the heater burnout detector can be easily checked as follows: In a Single-phase Circuit Set the operating current to be 0. 6 to 0. 55 times the heater current. Close the SW2 with switch SW1 turned on. Confirm that the alarm indicator remains off. Turn off SW1 and confirm that the alarm indicator comes on, and that the output relay operates. K2CU In a Three-phase, Star Network Set the operating current to be 0. 9 times the heater current. Close the SW2 with switch SW1 turned on. Confirm that the alarm indicator remains off. Turn off SW1 and confirm that the alarm indicator comes on, and that the output relay operates. SW2 SSR SW2 SSR G+ G­ G+ S1 G­ S2 S1 K2CU-F S2 SW1 K2CU-F SW1 Heater Heater In a Three-phase, Delta Network Set the operating current to be 0. 6 times the heater current. Close the SW3 with switches SW1 and SW2 turned on. Confirm that the alarm indicator remains off. Turn off SW2 and confirm that the alarm indicator comes on, and that the output relay operates. Turn on SW1 set the operating current to be 0. 9 times the heater current, and confirm that the alarm indicator goes off and the output relay releases. Turn off SW1 and confirm that the alarm indicator comes on, and that the output relay operates. SW3 SSR G+ G­ S1 S2 K2CU-F SW1 SW2 Heater 6 K2CU In a Three-phase, V Network 1 Set the operating current to be 0. 3 to 0. 35 times the heater current. Close the SW2 with switch SW1 turned on. Confirm that the alarm indicator remains off. Turn off SW1 and confirm that the alarm indicator comes on, and that the output relay operates. K2CU In a Three-phase, V Network 2 Set the operating current to be 0. 6 times the heater current (of the phase connected between terminals 1 and 2, or the one passed through the window of the window-type Current Transformer of the heater burnout detector). Close the SW2 with switch SW1 turned on. Confirm that the alarm indicator remains off. Turn off SW1 and confirm that the alarm indicator comes on, and that the output relay operates. SW2 SSR SW2 SSR G+ G­ G+ S1 G­ S2 S1 K2CU-F S2 SW1 SW1 Heater K2CU-F Heater K2CU-F, K2CU-P The operation of the heater burnout detector can be easily checked as follows: In a Single-phase Circuit Set the operating current to be 0. 55 to 0. 6 times the heater current. Close the contactor with switch SW1 turned on. Confirm that the alarm indicator remains off. Switch K2CU-P Switch b1 S1 S2 R Slidac SW1 CM1 a1 K2CU-F R Slidac 2 3 K2CU-P 7 8 1 6 5 4 Note: Determine the value of R according to the specifications of the K2CU to be used. The dotted line indicates the connection at a supply voltage of 100 or 110 VAC. Dimensions Note: All units are in millimeters unless otherwise indicated. [. . . ] of heater per phase = n 0 0. 87 0. 6 0. 92 0. 75 0. 95 0. 82 0. 96 0. 86 0. 97 Current in other phases Current in burned-out phase I 0. 58 1 0. 77 1 0. 84 1 0. 88 1 0. 91 1 Current in other phases No. This table shows the respective change rates in current when any one of several heaters connected in parallel has burned out. The current value under the normal condition is 1. The values in this table are logical values. [. . . ]