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      參數(shù)資料
      型號: LK5320-7D2B2
      廠商: POWER-ONE INC
      元件分類: 電源模塊
      英文描述: 2-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE
      封裝: HEAT SINK, METAL, CASE K02
      文件頁數(shù): 14/28頁
      文件大?。?/td> 1215K
      代理商: LK5320-7D2B2
      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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