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参数资料
| 型号： | LOK1601-2 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 48 W AC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 8/8页 |
| 文件大小： | 334K |
| 代理商： | LOK1601-2 |
OK Series
AC-DC Converters 100 Watt
Benign Environment
Edition 2/6.99
8/8
MELCHER
The Power Partners.
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
accessible parts. The current value is calculated by dividing
the measured voltage by 500
. If inputs and/or outputs of
O-units are connected in parallel, their individual leakage
currents are added.
MI for
output
leakage
current
Vo+
Vo–
N
P
10053
N
P
MI for
earth
leakage
current
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
255 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
Fig. 9
Test set-up.
Fig. 8
Measuring instrument (MI) for earth leakage current tests
according to IEC/EN 60950.
Table 11: Leakage currents
Characteristic
LOK
Unit
Maximum earth
Permissible according to IEC/EN 60950
3.5
mA
leakage current
Specified value at 264 V, 50 Hz
0.5
Maximum output
Permissible according to IEC/EN 60950
0.25
leakage current
Specified value at 264 V, 50 Hz
0.005
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
O-family 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 Informa-
tion: Safety.
Table 12 : Safety concept leading to an SELV output circuit
Conditions
AC-DC converter
Installation
Result
Nominal Supply
Grade of insulation between
Measures to achieve the resulting
Safety statuts of the AC-DC
voltage
input and output, provided
safety statuts of the output circuit
converter output circuit
by the AC-DC converter
Mains
≤250 V AC
Double or reinforced
Earth connection 1 and installation
SELV circuit
according to the applicable standards
1 The earth connection of terminal no. 1 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. 10
Schematic safety concept.
Use fuses and earth connection as per
Installation
Instructions and table Safety concept leading to an SELV
output circuit.
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