Isolation Resistance; Withstand Voltage Test (Hipot Test) - TDK-Lambda PFH500 Series Instruction Manual

6.16 Isolation Resistance

The isolation resistance between the PFH Output and the module's case typically will be 100M with 500VDC applied.

6.17 Withstand Voltage Test (Hipot Test)

PFH Series modules are designed to withstand 2.5kVac between input and module case, 3.0kVac (reinforced voltage)
between input and output, and 1.5kVdc between output and case, each for 1-minute dwell. When testing withstand voltage
(or Hipot test), set the leakage current limit of the withstand voltage tester (or Hipot tester) to 20mA.
Be sure to apply only DC Hipot test voltages between output and case. AC test voltages between output and case may
damage PFH modules.
The applied voltage must be gradually ramped from zero-volts to preset testing level, and then gradually decreased back to
zero-volts. The ramp rate must not exceed 300Vrms/sec and the dwell time should be 1 sec in mass production or 60
seconds during the safety qualification test. Connect each terminal of PFH module according to the circuit diagrams as
shown in Figure 6-12a, Figure 6-12b, and Figure 6-12c.
REV 2.8 (March 30, 2020)
PMBus Interface
RS (+)
Vo(+)
Vo(+)
Vo(-)
Vo(-)
Trim
AC(L)
PFH500F
PG
ON/OFF
AC(N)
Aux Power
SGND
Case
Inrush
Control -VBUS + VBUS
Fig 6-12 Isolation Resistance Test Method
Insulation Resistance Tester
TDK-Lambda
PFH500-SERIES
INSTRUCTION MANUAL
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