95x Series Operating Manual - May 17, 2022
Page
64
of
155
When performing a lead compensation, the leakage limits are not enforced, otherwise the test step is executed
normally.
EXAMPLES
Example 1 -
A DUT is to have its Line/Neutral power connections tested to its
chassis for “no breakdown” at 2000Vdc using a 1
second ramp and a 30 second dwell. It is known that the DUT leakage is less than 5mA at this voltage level (if this
is not known, then start by using 5mA as the limit and adjust it as needed).
This is accomplished in a single step as follows
–
Seq 1 Step 1 DCez
Only breakdown detection is needed, so use the DCez type
LEVEL: 2000.0V
As required
RAMP: 1.00sec
As required
DWELL: 30.0sec
As required
Lim: 0n-5.000mA
As required
ON FAIL: ABORT SEQ
Example 2
–
A solar panel is to be tested for “no breakdown”
at 2500Vdc using a 1 second ramp and a 5 second dwell time. The
panel is estimated to have between 1 and 4uF of capacitance. The test limit for breakdown has been decided to be
1mA and it has been decided to not test for arcing in the panel because of its capacitance.
This is accomplished in a single step as follows
–
Seq 1 Step 1 DCW
Different breakdown and leakage limits, so use DCW
LEVEL: 2500.0V
As required
BREAKDOWN: 20.00mApk
Must be greater than the charging current
RAMP: 1.00sec
As required
DWELL: 5.00sec
As required
Delay: 1.00sec
Allow for dielectric storage in the panel
Lim: 0n-1.000mA
As required
ARC DETECT:OFF
As required
DISCHARGE: FAST
ON FAIL: ABORT SEQ
Example 3
–
The solar panel used in example 2 above is also required to be tested for insulation resistance at 500Vdc, the
specification requires the panel to have >100Mohm resistance. A ramp time of 1 second and a dwell time of 5
seconds have been chosen.
The DCIR test is performed first since if the DCIR were performed after the breakdown test then there would be
much longer settling time required because the panel is settling from 2500V to 500V, i.e., a 2000V change rather
than a 500V change prior to the very sensitive DCIR measurement.
This is accomplished in two steps as follows
–
Seq 1 Step 1 DCIR
This could also be a DCW test with the same results
LEVEL: 500.0V
As required
BREAKDOWN: 5.000mApk
Must be greater than the charging current
RAMP: 1.00sec
As required
DWELL: 5.00sec
As required