Fonrich Product Class | Lesson One: PV DC Arc Fault Detector

Author： David     Date： March 01, 2024      Source： Fonrich

Introduction

Since its inception, Fonrich New Energy has developed product lines in photovoltaic safety products, arc technology, intelligent systems, and more.

To help everyone gain a deeper understanding of Fonrich’s products, I will provide detailed introductions to these product lines in a series of installments. As one of Fonrich New Energy’s flagship products, the DC Arc Fault Detector is featured in the first lesson.

Questions?

What is a DC Arc Fault Detector?

The Fonrich DC Arc Fault Detector is a safety device designed to detect and identify DC arc faults in photovoltaic systems. It can quickly and accurately detect real arcs occurring in DC circuits, thereby preventing potential fire hazards and electrical accidents.

Special Focus

How does the DC Arc Fault Detector detect arcs?

The DC Arc Fault Detector determines whether a real arc is present by collecting and analyzing electrical parameters in the circuit. When an abnormal signal is detected, the detector triggers an alarm to the inverter to cut off the power, preventing further damage.

Industry Recommendation

Why use Fonrich’s DC Arc Fault Detector?

High-precision detection: Fonrich’s detector employs advanced sensing technology and algorithms to accurately identify arc faults.

Rich application experience: With mature integration and testing processes, it is currently the most widely used arc detection device by inverter manufacturers.。

Strong technical capabilities: In 2017, Fonrich became the first in China and the fifth globally to obtain the UL1699B certification.

What is the purpose of the Fonrich’s Arc Fault Detector?

The FR-DCMG-AS4A DC Arc Monitoring Sensor can be applied in various DC transmission and distribution scenarios, such as photovoltaic combiner boxes, DC cabinets, telecom equipment rooms, communication base stations, and energy storage inverters. It continuously monitors for arc faults in DC circuits. Upon detecting an arc fault, the device immediately triggers an alarm signal to the inverter or other executing mechanism to cut off the fault loop, effectively preventing safety hazards such as fires caused by arcs.

Product Features

What are the features of Fonrich’s DC Arc Fault Detector?

Modular design: Each module can support up to 4 channels, with a maximum support of 24 channels.

Independent arc detection for each channel: Arc alarm thresholds can be set.

Integrated current measurement function.

Standard protocol Modbus interface: Indicates the channel with a fault arc.

Support for long string circuits: Maximum support of 1600m.

Compatibility with SunSpec RSD’s PLC: Reduces the likelihood of false alarms.

Rail-mounted installation: Easy to integrate, safe, and reliable.

Additional Knowledge: The DC Arc Fault Detector is utilized in Fonrich’s safety series products, such as the string-type arc fire protection box. When an arc fault is detected in a particular string of the photovoltaic array, the arc protection box immediately activates, disconnecting the string current to prevent fire incidents.