Detecting a DC arc differs from interrupting its circuit
- Series DC arc
An arc can bridge a discontinuity in the series circuit. It may not create a large overcurrent, so its detection and response need their own assessment.
- DC breaking capacityThis term
A switching or protective device interrupts the specified DC circuit. Confirm the assessed duty rather than using a connector as a load-break device.
- Arc-fault detection
The detector recognizes the conditions within its scope. Verify whether and how the system provides interruption or another required response.
A series arc appears along a current path. A detector recognizes specified signatures, while interruption requires a device assessed for the applicable DC switching or protective duty.
Conceptual partial circuits without switching ratings. Ordinary PV connectors without load-breaking capability are not disconnectors; detection alone does not guarantee interruption.