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  3. High-performance metal-oxide varistor for d.c. systems

    直流系統避雷器用高性能氧化鋅電阻片

    表2 直流系統避雷器用高性能氧化鋅電阻片外形尺寸及特性
    Table 2 Dimensions and electrical characteristics of MOV for d.c. systems

    型號
    Type
    外經
    Outer
    Diameter
    mm
    內徑Inner
    Diameter
    mm
    高度Height
    mm
    直流1mA參考電壓
    Reference
    Voltage at 1mA D.C
    kV
    10kA 8/20µs殘壓
    8/20µs residual voltage for lightning
    Impulse at 10kA
    ≤kV(p)Max
    平均壓比Average voltage
    Ratio
    V10kA/V1mA
    4/10µs大電流2次
    4/10µs high current impulse withstand ×2 cycles
    kA(p)
    2ms方波通流容量18次
    2ms rectangular
    current impulse withstand×18 cycles
    A(p)
    用途
    Usage
    D42
    42
     
    24±0.5
    5.0±0.5
    9.3
    1.80
    100
    400
    地鐵、鐵路、
    輕軌、電 站等
    Metro / Railway / Light rail/ Station,etc
    D53
    53
     
    24±0.5
    4.7±0.5
    8.5
    1.70
    100
    700
    D60
    60
     
    24±0.5
    4.7±0.5
    8.4
    1.69
    100
    800
    D71
    71
    26
    22±0.5
    4.5±0.5
    8.3
    1.67
    100
    1000
    D71
    71
     
    22±0.5
    4.5±0.5
    8.3
    1.67
    100
    1200
    D76
    76
     
    22±0.5
    4.5±0.5
    8.2
    1.65
    100
    1500
    D108
    108
     
    18±0.5
    3.5±0.5
    6.1
    1.64
    100
    2000
    D115
    115
     
    18±0.5
    3.5±0.5
    6.0
    1.62
    100
    2500



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