KRAUS & NAIMER Contactor Catalogue

Capacitor Switching Contactors for use with reactive or non-reactive capacitor banks Rated Operational Power at 50/60Hz Aux. Type Coil voltage 1) Ambient Temperature Contacts 220-240V 50°C 60°C Built-in Add. 50Hz 380V 415V 660V 380V 415V 660V 400V 440V 690V 400V 440V 690V kVAr kVAr kVAr kVAr kVAr kVAr NO NC pcs. 0-12.5 0-13 0-20 0-12.5 0-13 0-20 1 - 1 2) 9B K3-18NK10A230 A230 0-12.5 0-13 0-20 0-12.5 0-13 0-20 - 1 1 2) 9B K3-18NK01A230 A230 10-20 10.5-22 17-33 10-20 10.5-22 17-33 - - 3 3) 9B K3-24K00A230 A230 10-25 10.5-27 17-41 10-25 10.5-27 17-41 - - 9B K3-32K00A230 A230 20-33.3 23-36 36-55 20-33.3 23-36 36-55 - - 3 3) 9B K3-50K00A230 A230 20-50 23-53 36-82 20-50 23-53 36-82 - - 9B K3-62K00A230 A230 20-75 4) 23-75 4) 36-120 4) 20-60 23-64 36-100 - - 9B K3-74K00A230 A230 33-80 36-82 57-120 33-75 36-77 57-120 - - 6 5) 9B K3-90K00A230 A230 33-100 6) 36-103 6) 57-148 6) 33-90 6) 36-93 6) 57-148 6) - - 9B K3-115K00A230 A230 Specification: Contactors K3-..K are suitable for switching low-inductive and low loss capacitors in capacitor banks (IEC70 and 831, VDE 0560) without and with reactors. Capacitor switching contactors are fitted with early make contacts and damping resistors, to reduce the value of make current <70 x I e . Operating Conditions: Capacitor switching contactors are protected against contact welding for a prospective making current of 200 x I e . Technical Data acc. to IEC 947-4-1, IEC 947-5-1, EN 60947-4-1, EN 60947-5-1, VDE 0660 Type 9B K3-18NK 9B K3-24K 9B K3-32K ZBK3-50K 9B K3-62K 9B K3-74K 9B K3-90K 9B K3-115K Max. frequency of operations z 1/h 120 120 120 120 120 80 80 80 Contact life non reactive capacitor banks S x 103 250 150 150 150 150 120 120 120 reactive capacitor banks S x 103 400 300 300 300 300 200 200 200 Rated operational current I e at 50°C A 0-18 14-28 14-36 30-48 30-72 30-108 50-115 50-144 AC6b at 60°C A 0-18 14-28 14-36 30-48 30-72 30-87 50-108 50-130 Rated operational current I th at 50°C A 32 45 60 100 110 120 155 190 AC1 at 60°C A 32 40 55 90 100 110 145 170 Overload factor at 50°C % 78 60 67 108 53 11 35 32 acc. to EN 61921: 30% min. at 60°C % 78 43 53 88 39 26 34 31 Fuses gL (gG) from / to A 35 / 63 50 / 80 63 / 100 80 / 160 125 / 160 160 / 200 160 / 200 160 / 250 Typical Circuit Diagram Wiring Diagram for Quick Discharge Resistors Make sure that the current of the discharge resistors is not higher than the rated current (AC1) of the auxiliary contacts. Mounting instructions: In the area of capacitor switching contactors, difficulty inflammable and self-extinguishing materials shall be used only, because abnormal temperatures within the area of the resistor spirals cannot be excluded. 1) Other coil voltages, please contact us 2) 1 HN.. snap-on auxiliary 3) 2HB.. for side mounting and 1 HN.. snap-on auxiliary 4) Consider the max. thermal current of the contactor K3-74A: I th 130A 5) 2 HB.. on the left or right side and 4 HN..snap-on auxiliary 6) Consider the min. cross-section of conductor at max. load K3-18NK K3-24K & K3-32K K3-90K & K3-115K K3-50K K3-62K K3-74K 18