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    參數(shù)資料
    型號(hào): LK4601-7D3T
    廠商: POWER-ONE INC
    元件分類: 電源模塊
    英文描述: 1-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE
    封裝: HEAT SINK, METAL, CASE K02
    文件頁(yè)數(shù): 14/28頁(yè)
    文件大小: 1215K
    代理商: LK4601-7D3T
    Rugged Environment
    AC-DC Converters >100 Watt
    K Series
    Edition 4/4.99
    21/28
    MELCHER
    The Power Partners.
    Leakage Currents in AC-DC operation
    Leakage currents flow due to internal leakage capacitance
    and RFI suppression Y-capacitors. The current values are
    proportional to the mains voltage and nearly proportional to
    the mains frequency and are specified at an input voltage of
    254 V (50 Hz) where phase, neutral and protective earth
    are correctly connected as required for class I equipment.
    V
    MI
    500
    1500
    10 k
    220 nF
    22 nF
    10061
    Under test conditions the leakage current flows through a
    measuring instrument (MI) as described in fig.:
    Measuring
    instrument for earth leakage current tests, which takes into
    account impedance and sensitivity of a person touching
    unearthed accessible parts. The current value is calculated
    by dividing the measured voltage by 500
    . If inputs of K-
    units are connected in parallel, their individual leakage cur-
    rents are added.
    Fig. 28
    Measuring instrument (MI) for earth leaking current tests
    according to IEC/EN 60950.
    Vo+
    Vo–
    N
    P
    10062
    N
    P
    MI for
    earth
    leakage
    current
    Fig. 29
    Test set-up
    Table 14: Leakage currents
    Characteristic
    Class I
    Unit
    LK 4000, LK 5000
    Maximum earth
    Permissible according to IEC/EN 60950
    3.5
    mA
    leakage current
    Specified value at 254 V, 50 Hz
    0.82
    Safety of operator accessible output circuit
    If the output circuit of an AC-DC converter is operator ac-
    cessible, it shall be an SELV circuit according to the IEC/EN
    60950 related safety standards.
    The following table shows a possible installation configura-
    tion, compliance with which causes the output circuit of an
    K series AC-DC converter to be an SELV circuit according
    to IEC/EN 60950 up to a configured output voltage (sum of
    nominal voltages if in series or +/– configuration) of 36 V.
    However, it is the sole responsibility of the installer to as-
    sure the compliance with the relevant and applicable safety
    regulations. More information is given in:
    Technical Infor-
    mation: Safety.
    Table 15: Safety concept leading to an SELV output circuit
    Conditions
    AC-DC converter
    Installation
    Result
    Nominal voltage
    Grade of insulation
    Measures to achieve the resulting
    Safety status of the AC-DC
    between input and output
    safety status of the output circuit
    converter output circuit
    provided by the AC-DC converter
    Mains
    Double or reinforced
    Earthed case 1 and installation
    SELV circuit
    ≤250 V AC
    according to the applicable standards
    1 The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950.
    AC-DC
    con-
    verter
    Mains
    SELV
    Earth connection
    +
    ~
    10021
    Fuse
    Fig. 30
    Schematic safety concept. Use fuses and earth connec-
    tion as per: Installation Instructions and table: Safety con-
    cept leading to an SELV output circuit
    .
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