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HH15(QSA)-Knife-Melt-Isolation-Switch-with-Fuse-(1).jpg
HH15(QSA)-Knife-Melt-Isolation-Switch-with-Fuse-(2).jpg
HH15(QSA)-Knife-Melt-Isolation-Switch-with-Fuse-(3).jpg
HH15(QSA)-Knife-Melt-Isolation-Switch-with-Fuse-(4).jpg

HH15(QSA) Knife Melt Isolation Switch with Fuse

The HH15(QSA) Knife Melt Isolation Switch with Fuse delivers robust circuit protection and isolation for industrial power systems, supporting 63A-1250A loads at AC380-660V. This isolation switch integrates fuse protection (NT00-NT3/RS0 series) with high short-circuit withstand (up to 100kA at 380V), ensuring reliable fault interruption. Featuring 3P/4P/3+N configurations and 15000-cycle mechanical endurance, the HH15 switch operates with low torque (7.5-40Nm) and complies with AC-23B utilization standards. Its compact design combines isolation and melting protection in one unit, ideal for motor control centers and distribution panels requiring safe maintenance and overload safety.

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    product details

    Type Designation

    HH15(QSA)-Fuse-Isolation-Switch-5
    1 Isolator-fuse combination
    2 Design serial number
    3 Conventional heating current (A)
    4 Number of poles: 2-pole, 3-pole, 4-pole
    5 Indicates the number of auxiliary contacts: 0 - No auxiliary contacts; 1 - With 1 pair of auxiliary contacts; 2 - With 2 pairs of auxiliary contacts.
    6 "QP" indicates a structure without a fuse and with parallel contacts
    "QA" indicates a structure without a fuse and with series contacts.
    "QSA or no letter" indicates a structure with a fuse and series contacts.
    7 Type Code Explanation, Single-Throw, S: Double-Throw

    Technical Parameters

    Specification (s) 63 125 160 250 400 630 800 1000 1250
    Main pole number 3,4,3+N 3
    Rated insulation voltage (V) Ue=400 time,Uj=660;Ue=660 time,Uj=1000.
    Rated working voltage (V) AC=380,660
    Rated enclosed heating current (A) 63 125 160 250 400 630 800 1000 1250
    Rated operating current (A) 400VAC-23B 63 125 160 250 400 630 800 1000 1250
    660VAV-23B 63 100 160 250 315 425 500 630 800
    Rated limited short-circuit current 380VY/H (kA) 100 50
    Rated limited short-circuit current 660V(kA) 50
    Mechanical life (times) 15000 15000 12000 12000 12000 3000 500 500 500
    Electrical life (times) 1000 1000 300 300 300 200 100 100 100
    Fuse rated current (A) 400V/1660V time 63/63 125/100 160/160 250/250 400/315 630/425 800/500 1000/630 1250/800
    Model of fuse tube with knife-type contacts RDT16-00(NT00) RDT16- 1(NT1) RDT16- 2(NT2) RDT16-3(NT3) RS0
    Operating torque (Nm) 7.5 16 30 40
    Rated heating current of auxiliary contact ITH380V/AC-11 (A) 5

     product Display

    HH15(QSA)-Fuse-Isolation-Switch-(1)
    HH15(QSA)-Fuse-Isolation-Switch-(2)
    HH15(QSA)-Fuse-Isolation-Switch-(3)
    HH15(QSA)-Fuse-Isolation-Switch-(4)

    Outline and Installation Dimensions

    Outline and installation dimensions of HH15(QSA) series isolating switch-fuse combinations

    HH15-3
    Model specifications A B C D E F G H  I L L1 L2 L3
    HH15-63 12 6 100 M5 2 39.5 72 38.5  9 199-250 250-301 301-385 180-199
    HH15-125 15 7.5 116 M6 3 38.5 70 40.5  10 199-250 250-301 301-385 180-199
    HH15-5
    Model specifications A B C D E F G H I L L1 L2 O
    HH15-160 20 10 146 M8 4 44 107 65 46 226-284 284-342 342-400 120
    HH15-250 25 12.5 160 M10 4 40 107 65 43.5 226-284 284-342 342-400 160
    HH15-400 25 12.5 160 M10 6 38 107 65 43.5 226-284 284-342 342-400 160
    HH15-7
    Model specifications A B C D E F G H I L L1 L2 L3
    HH15-630 40 20 270 M12 6 33 B7 87 60 300-355 295-330 300-400 400-500
    HH15-9
    Model specifications A B1 C D E F G H I L L1 L2 L3
    HH15-800/1000 50 18 340 M12 1 33 87 87 60 300-355 295-330 330-400 400-500
    HH15(QSA)-800/3 Single Hole 50 18 340 M12 1 33 87 87 38 300-355 295-330 330-400 400-500
    HH15-11
    Model specifications A B C D E F  G H I L L1 L2 M N   O
    HH15-1250 70 17 370 M10 8 50 120 120 80 395-430 495-530 560-595 400 330 153