Voltage Breakdown Analysis of Devices with Network Ports
By studying the phenomenon of voltage breakdown of devices with network ports,it is found that the device is affected by the inherent impedance of the network transformer,so that the functional insulation impedance of the network port end is similar to the enhanced insulation impedance of the power supply end.After the voltage resistance is applied in the safety test,it is easy to generate arc at the dense solder joints of the Bob-Smith circuit,triggering the electric arc detection and alarm of the voltage instrument,resulting in misjudgment of the test results.It is recommended that the effective safety protection insulation be tested separately,or the capacitive insulation be tested for DC voltage resistance,or the equipotential connection be used for non-safety protection insulation to avoid misjudgment.
electric strength testnetwork transformerbob-Smithimpedance and voltage distributionsafety protection insulationARCING TEST
NETL
NSTL
万方数据
