PM50/PM80 INSTALLATION MANUAL
10231-10.doc
Polyamp AB, Sweden
www.polyamp.com
Page
6 (7)
Figure 2. Output to case isolation voltage test
5.2
DC isolation test input to output and
input to case
1.
Disconnect all cables from the converter.
2.
Connect the output terminals of the converter to
case.
3.
Connect the input terminals together.
4.
Connect your isolation tester between input and
case. See
ג
. Raise the voltage of the isolation
tester from 0 to 2000Vd.c. Check that the
leakage current does not exceed 5µA. The
voltage should not be applied for more than a
few seconds or the Y-capacitors might be
damaged.
5.
Turn off the isolation tester and discharge the
test voltage with a 10 M
Ω
resistor between
input and case.
Figure 3. Input to output and input to case
isolation voltage test
5.3
AC isolation test input to output and
input to case
You can also test 2500Va.c. for one (1) minute
between input to output and case on units with
input codes 110, 220, C and D.
Beware of the rather high capacitive earth
currents (about 50mA) that will occur during
this test.
If your isolation test equipment cannot supply this
current, you can perform a DC isolation test with
4000Vd.c (2500V x
√
2 x 1.1
≈
4000Vd.c where 1.1
= safety factor). Follow the instructions in
5.2
DC
isolation test input to output and input to case
above but test with 4000Vd.c. instead of 2000Vd.c.
The leakage current should not exceed 5µA.
AC isolation test:
1.
Disconnect all cables from the converter.
2.
Connect the output terminals of the converter to
case. See
ג
.
3.
Connect the input terminals together.
4.
Connect your isolation tester between input and
case. See
ג
. Raise the voltage of the isolation
tester from 0 to 2500Va.c. The voltage should
not be applied for more than one (1) minute or
the Y-capacitors might be damaged.
5.
Turn off the isolation tester and discharge the
test voltage with a 10 M
Ω
resistor between
input and case.
5.4
DC isolation test output1 to output2
1.
Disconnect all cables from the converter.
2.
Connect the input terminals of the converter to
case.
3.
Connect the output ”U2” terminals to case.
4.
Connect the output ”U1” terminals together.
5.
Connect your isolation tester between output
”U1” and case. See
ד
. Raise the voltage of the
isolation tester from 0 to 500Vd.c. Check that
the leakage current does not exceed 5µA. The
voltage should not be applied for more than a
few seconds or the Y-capacitors might be
damaged.
6.
Turn off the isolation tester and discharge the
test voltage with a 10 M
Ω
resistor between
output ”U1” and case.
Figure 4. Output ”U1” to output ”U2” isolation
test
6
Trouble shooting
6.1
There is no output voltage
1.
Check that the input fuse is not broken.
