KMC CONTACTORS
Contactors series

The KMC series contactors are used for the automatic control of three-phase capacitor banks with a rated power of 5 kVAR to 75 kVAR (230V to 690V / 50 Hz).

    Standards:
    • IEC 61921
    • IEC 61439-1/2
    Certifications

    Description

    The KMC series contactors are used for the automatic control of three-phase capacitor banks with a rated power of 5 kVAR to 75 kVAR (230V to 690V / 50 Hz).

    They are equipped with pre-charge resistors connected via early-closing contacts, which are an integral part of the KMC contactors.

    This particular type of contacts is designed to connect resistors for a very short time, up to 5ms, during the closing of the contactor, limiting the inrush current of the capacitors. These resistors are then bypassed once the closing operation is completed, and the current capacity is transferred to the main contacts. This type of circuit allows for minor wear on all system components, including fuses and capacitors, ensuring a longer lifespan and improved reliability. Suitable for capacitors with and without anti-harmonic reactors.

    Technical sheet

    Designation Type KMC12 KMC25 KMC50 KMC75
    Capacitor power at rated voltage 50/60Hz 230V
    400-440V
    500-550V
    660-690V     		/kvar
    /kvar
    /kvar
    /kvar     		6.7
    12.5
    15
    18     		14
    25
    30
    35     		29
    50
    60
    70     		38
    75
    80
    105
    Rated operational current Ie/AC-6b at 400V A 18 36 72 108
    Rated operational current Ith at 400V A 25 50 100 150
    Isolation voltage Ui V 690 1000
    Operating ambient temperature °C de -25 à +55
    Impulse withstand voltage Uimp kV 8
    Coil power consumption at cold state When switching on
    f.p.
    Triggered
    f.p.     		VA
    VA
    VA
    VA     		62
    0,75
    7
    0,3     		65
    0,75
    8
    0,3     		155
    0,6
    12
    0,29     		204
    0,54
    16
    0,26
    Coil Voltage tolerances
    Tightening torque
    Clamping screw type    		 Nm 0,85 – 1,1 UN
    0,8
    M3,5/PZ2
    Degree of protection IP 20
    Maximum fuse rating Main circuit gL/gG
    Auxiliary circuit     		A
    A     		35
    16     		63
    16     		125
    16     		160
    16
    Frequency of switching operations c/h 240 120 100 100
    Electrical endurance min 250.000 125.000 100.000
    Conductor dimensions
    (Power circuit)     		Multi-wire cable

    Clamping screw
    Screw head type
    Tightening torque

    		mm2 1.5-6

    M4
    PZ2
    1,2 Nm

    		2.5-10

    M4
    PZ2
    1,6 Nm

    		16-35

    M6
    PZ2
    3 – 4 Nm

    		25-50

    M8

    4 – 4.5 Nm

    Conductor dimensions
    (Control circuit)    		 Multi-wire cable
    Clamping screw
    Screw head type
    Tightening torque     		mm2
    mm2     		1-2,5
    0,75-1,5

    M3,5
    PZ2
    0,8 Nm

    Maximum load of auxiliary contacts – Current at 35°C A 10 16
    Rated AC operational current Ie/AC15 under: 230V
    400V
    500V
    690V     		A
    A
    A
    A     		6
    4
    2
    1     		10
    6
    4
    2

    Product Documentations