參數(shù)資料
型號: LS5660-7R
英文描述: 100 Watt AC-DC Converters with PFC
中文描述: 100瓦交直流轉(zhuǎn)換器的功率因數(shù)校正
文件頁數(shù): 20/27頁
文件大?。?/td> 599K
代理商: LS5660-7R
Cassette Style
100 Watt AC-DC Converters
S Series PFC
Edition 01/01.2001
20/27
Table 13: Isolation
Characteristic
Input to
case
Input to
output
Output to Output to
case
Unit
output
Electric
strength
test voltage
Required according to
IEC/EN 60950
1.5
3.0
1
kV
rms
2.1
4.2
1
kV DC
Actual factory test 1 s
2.8
5.6
1
1.4
0.14
AC test voltage equivalent
to actual factory test
2.0
4.0
1
1.0
0.1
kV
rms
Insulation resistance at 500 V DC
>
300
>
300
>
300
>
100
2
M
1
In accordance with IEC/EN 60950 only subassemblies are tested in factory with this voltage.
2
Tested at 100 V DC.
For creepage distances and clearances refer to: Technical Information: Safety.
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
1
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 S-
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
Standards and Approvals
All AC-DC converters correspond to class I equipment.
They are UL recognized according to UL 1950, UL recog-
nized for Canada to CAN/CSA C22.2 No. 950-95 and LGA
approved to IEC/EN 60950 standards.
The units have been evaluated for:
Building in
Basic insulation between input and case, based on 250 V
AC and 400 V DC
Double or reinforced insulation between input and output,
based on 250 V AC and 400 V DC
Basic insulation between output and case based on
200 V AC and DC
Operational insulation between output and output
Connecting the input to a primary or secondary circuit
which is subject to a maximum transient rating of 2500 V
(overvoltage category III based on a 110 V primary cir-
cuit, overvoltage category II based on a 230 V primary
circuit).
The use in a pollution degree 2 environment
The UL 1950 recognition limits the minimum input voltage
to U
i
= U
i min
+ 5 V AC = 90 V AC if the case temperature
exceeds 90
°
C.
The AC-DC converters are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA, EN and with ISO 9001 standards.
Isolation
The electric strength test is performed as factory test in ac-
cordance with IEC/EN 60950 and UL 1950 and should not
be repeated in the field. Power-One will not honour any
guarantee claims resulting from electric strength field tests.
Important:
Testing by applying AC voltages will result in
high and dangerous leakage currents flowing through
the Y-capacitors (see fig.: Block diagram).
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