H.V. HRC Current-Limiting Fuses type W for Motor Protection

H.V. & L.V. Fuse Link & Base

H.V. HRC Current-Limiting Fuses type W for Motor Protection

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S for Transformer Protection
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W for motor protection
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O for Transformer Protection
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Applications

  • H.V HRC current-limiting fuses type W for motor protection is mainly used in AC 50Hz, rated voltage 3.6-10kV, rated current up to400A(3.6kV), 224A(7.2kA) circuit for protecting motor and power equipment from overload and short-circuit.
  • It can also be used with load switch; vacuum contact it conforms to IEC282-1, IEC644, BS and GB15166.2.

Design Features

  • W type H.V HRC current-limiting fuses have two installations: bus-bar installation and insert installation. It is small in volume, reliable in connection. The power striker parallels to the fuse element made from pure silver. They are sealed in the fuse tube filled with chemically treated high-purity quartz sand. The fuse tube is made from heat resistant, high duty ceramic or epoxy glass. When fault circuit happens. The fuse link melts, the high-resistant metal wire paralleling to fuse links melts immediately at the appearance of the arc, and the striker jumps out to push the chained equipment contact, signaling the melting or automatically cutting the circuit. W type H.V HRC current-limiting fuses have many merits as high current-limiting ability, high breaking capacity, quick and punctual in action, reliable in performance.

Mode And Implication

    Cross-reference:
    Mode And Implication
    Department Model:
    Mode And Implication
Basic Data
Models Ratedvoltage (KV) Rated current of the fuse links(A) Rated breakingcurrent (KA) Dimensions (mm) Figure 1 Weight (Kg)
Foreign Department Fig. ΦD L
WDF.O XRNM1 3.6 50, 63, 80, 100,125 50 Figure 1~2 51 254 1.4
WFF.O XRNM1 3.6 100, 125, 160, 200 50 76 254 2.8
WKF.O XRNM1 3.6 250, 315, 355, 400 50 76 254 2.8
WFN.O XRNM1 7.2 25, 31.5, 40, 50, 63, 80, 100, 125, 160 40 76 403 4.15
WKN.O XRNM1 7.2 200, 224 40 76 403 4.15
  XRNM1 10 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 224 40 76 600 5.26
Note:
  • Under stipulated condition, min.breaking current of fuses could be as high as 2.5~3.0 times than rated current.
  • 7.2KV fuse link of 224A or above have a dual-tube body
  • 3.6KV fuse link of 400A or above have a dual-tube body
  • Dimensions

    Dimensions Dimensions Dimensions Dimensions
    Dimensions Dimensions Dimensions Dimensions
    Dimensions Dimensions Dimensions Dimensions
    Figure 1 fuses for busbar installation
    Current-Limiting Fuses type W for Motor Protection
    Dimensions Dimensions Dimensions Dimensions
    Dimensions Dimensions Dimensions Dimensions
    Dimensions Dimensions Dimensions Dimensions
    Figure 2 fuses for insert installation
    Current-Limiting Fuses type W for Motor Protection

    Dimension of moto protection fuse type W for busbar installation(mm)

    Model Dimensions
    A B C G E F
    WFF.O 390 312 340 140 246 209
    WKF.O 390 312 340 140 246 209
    WFN.O 500 461 150 160 266 358
    WKN.O 500 461 150 160 266 358
    XRNM1 690 659 350 160 266 555

    Selection for W type motor current-limit fuse box

    When started with full voltage, Rated current ≈ twice of loaded motor current; When started under other circumstances, rated current ≈ times of loaded motor current. For directly started motor, fuses of proper rated current should be selected according to the following formula;
      Iy=N.In.Φ
    • Iy for Starting current
    • N for Ratio of starting current and loaded current, usually N ≈ 6
    • In for Loaded motor current
    • Φ for Comprehensive cofficient, see following table.
    Φ Comprehensive cofficient
    Start times 2 4 8 16
    Φ 1.7 1.9 2.1 2.3
    Refer to time-current characteristice diagram for selection of proper H.V. fuse link, Rated current of fuse link should be 1.3 times thanloaded motor current.

    Characteristics Curve

    Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1
    Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1
    Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1 Time-current characteristics of 10KV fuse links type XRNM1
    Time-current characteristics of 10KV fuse links type XRNM1
    Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1
    Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1
    Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1 Cut-off current characteristics of 10KV fuse links type XRNM1
    Cut-off current characteristics of 10KV fuse links type XRNM1
    Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links
    Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links
    Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links Time-current characteristics of 3.6KV fuse links
    Time-current characteristics of 3.6KV fuse links
    Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links
    Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links
    Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links Cut-off current characteristic of 3.6KV fuse links
    Cut-off current characteristic of 3.6KV fuse links
    I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links
    I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links
    I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links I2.t characteristics of 3.6KV fuse links
    I2.t characteristics of 3.6KV fuse links
    Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links
    Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links
    Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links Time-current characteristics of 7.2KV fuse links
    Time-current characteristics of 7.2KV fuse links
    Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links
    Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links
    Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links Cut-off current characteristic of 7.2KV fuse links
    Cut-off current characteristic of 7.2KV fuse links
    I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links
    I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links
    I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links I2.t characteristics of 7.2KV fuse links
    I2.t characteristics of 7.2KV fuse links

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