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| 型號(hào)： | FM3020-7PD9AHFU |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件頁數(shù)： | 6/24頁 |
| 文件大小： | 536K |
| 代理商： | FM3020-7PD9AHFU |
Rugged Environment
DC-DC Converters <100 W
M-Family
Edition 2/96 - Melcher AG
7 - 15
MELCHER
The Power Partners.
7.1
Supplementary Data
Important Advice
Testing by applying AC voltages will result in high and
dangerous leakage currents through the Y-capacitors
(see fig. 1). Melcher will not honour any guarantee/war-
ranty claims resulting from high voltage field tests. Ref-
erence is also made to chapter: Safety and Installation
Instructions.
Isolation
Input to output electric strength tests, in accordance with
the safety standards IEC 950, EN 60950, VDE 0805 and
EN 41003 are performed as factory tests and should not be
repeated in the field.
Fig. 12
Definition of leakage currents and measurement proce-
dure by means of the measuring device MD
Table 15: Leakage currents
Characteristic
Class I (LM)
Class II (LMZ)
Unit
a) permissible according to IEC 950
a)
b)
a)
b)
b) value at 264 V, 50 Hz
max
Earth leakage current
3.5
1.4
–
mA
Enclosure leakage current
–
0.25
0.03
Output leakage current
0.25
0.005
0.25
0.15
MD for enclosure
leakage current
MD for output
leakage current
MD for earth
leakage current
MD for output
leakage current
connection to case
LMZ 1000…LMZ 3000
LM 1000…LM 3000
+
–
+
–
1500
150 nF
V
MD
Leakage Currents in AC-DC operation
Leakage currents will flow due to internal leakage capa-
citances and RFI suppression Y-capacitors. The current
values are proportional to the mains voltage and nearly pro-
portional to the mains frequency and are specified at an in-
put condition of 264 V/50 Hz where phase, neutral and pro-
tective earth are correctly connected as required for class I
equipment. Under test conditions the leakage currents flow
through a measurement circuit, consisting of a 1500
re-
sistance with a 150 nF capacitor connected in parallel. The
voltage drop across this element is measured and the cur-
rent value calculated from the measured voltage divided by
1500
.
If inputs of M-units are connected in parallel, their individual
leakage currents are added.
Table 14: Electric strength test voltage, insulation resistance, clearance and creepage distances
Characteristic
Input/Output
Input/Case
Output/Case Output/Output Unit
a) values according to IEC 950,
Class I
Class II
b) Product's performance
a)
b)
a)
b)
a)
b)
a)
b)
a)
b)
Electric strength
DC: 1 s
4243 1 56001
2122
2800
4243
5600
707
1414
–
300
V
test voltage
AC: 50 Hz, 1 min
3000 1 4000 1
1500
2000
3000
4000
500
1000
–
200
Insulation resistance
at 500 V DC
–
≥300
–
≥300
–
≥300
–
≥100
–
M
Clearance and
AM/BM
4.0
5.0
2.0
4.0
5.0
1.0
2.0
–
0.9
mm
Creepage distances
C...LM and C/D/LMZ
4.0
8.0
2.0
4.0
5.0
1.0
2.0
–
0.9
1 Only subassemblies performance in accordance with IEC 950
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