KMC contactors

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

    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

    DesignationTypeKMC12KMC25KMC50KMC75
    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 400VA183672108
    Rated operational current Ith at 400VA2550100150
    Isolation voltage UiV6901000
    Operating ambient temperature°Cfrom -25 to +55
    Impulse withstand voltage UimpkV8
    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 protectionIP 20
    Maximum fuse rating Main circuit gL/gG
    Auxiliary circuit
    		A
    A
    		35
    16
    		63
    16
    		125
    16
    		160
    16
    Frequency of switching operationsc/h240120100100
    Electrical endurancemin250.000125.000100.000
    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
    Multi-wire cable with screen

    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°CA1016
    Rated AC operational current Ie/AC15 under: 230V
    400V
    500V
    690V    		 A
    A
    A
    A
    		6
    4
    2
    1
    		10
    6
    4
    2

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