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參數(shù)資料
| 型號(hào)： | LKP5742-7ERD3T |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 250 W AC-DC PWR FACTOR CORR MODULE |
| 封裝： | HEAT SINK, METAL, CASE K02, MODULE |
| 文件頁數(shù)： | 10/23頁 |
| 文件大小： | 1150K |
| 代理商： | LKP5742-7ERD3T |
KP Series
AC-DC Converters >100 Watt
Rugged Environment
Edition 4/4.99
18/23
MELCHER
The Power Partners.
Table 11: Isolation
Characteristic
Input to
Output to Output to
Unit
case
output
case
output
Electric
Required according to
1.5
3.0
––
kVrms
strength
IEC/EN 60950
2.1
4.2
––
kV DC
test voltage
Actual factory test 1 s
2.8
5.6 1
1.4
0.14
AC test voltage equivalent
2.0
4.0 1
1.0
0.1
kVrms
to actual factory test
Insulation resistance at 500 V DC
>300
>100 2
M
For creepage distances and clearances refer to
Technical Information: Safety.
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
Operational insulation between output and case.
Operational insulation between output and output
The use in a pollution degree 2 environment
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 AC-DC converters are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA, EN and 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. Melcher will not honour any guar-
antee 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).
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. 25
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. 26
Test set-up
Table 12: Leakage currents
Characteristic
Class I
Unit
LKP 5000
Maximum earth
Permissible according to IEC/EN 60950
3.5
mA
leakage current
Specified value at 254 V, 50 Hz
0.82
1 In accordance with IEC/EN
60950 only subassemblies
are tested in factory with this
voltage.
2 Tested at 100 V DC.
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