The Arc Protection device is used in conjunction with optical sensors to provide arc fault protection for medium or low voltage air insulated switchgear, panels.

Application

• Arc Protection device is connected with light sensing optical sensors installed in busbar, circuit breaker, cable compartments
• Arc Protection device provides a straightforward retrofit solution to

existing switchgear installations to improve safety and protection performance.

Features

• Rapid fault detection with operating times typically between 2 to 7 milliseconds

• Zone-based selective tripping for enhanced system coordination

• Supports configuration of up to four independent protection zones

• Compatible with both new switchgear installations and retrofit applications

• Optionally integrated current inputs to allow current check criteria

• User-friendly configuration via PC-based software tool using USB-C interface:

 – Software available at no additional cost

 – Supports both online and offline configuration modes

• Fast response time helps reduce risk of injury and limits equipment damage

• Cost-effective solution for implementing or upgrading arc flash protection

• Integrated data logging capabilities:

 – Storage for up to 100 event records

 – Up to 5 fault records with time-stamped data

• Real-time monitoring of sensor status, input/output signals, and current measurements

• Simplified device installation process:

 – Compact enclosure design

 – DIN rail mounting support

 – Plug-in, detachable wiring terminals

Housing

The devices are housed in a polycarbonate case suitable for

mounting on a standard 35 x 15 mm DIN rail. Device dimensions (WxHxD) are 192mm x 164.2mm x 80mm

4 AFD sensor inputs, 4 High Speed Binary Outputs,  Pluggable connectors except CT Terminal, 4 current transformer inputs optionally, one binary input abd 1 binary output for device healthy signal,11 LEDs

x 4 AFD sensor inputs

O 4 AFD sensor inputs + 4 CT inputs

Conformal coating

x Standard version – No conformal coating on PCBA

O Conformal coating on PCBA

User interface

• 4 LEDs for zone trip outputs
• 4 LEDs for arc sensor operation and supervision
• 2 programmable LEDs
• 1 LED for device healthy
• Front USB interface

Front fascia

X Standard version

O Standard version with 4 CT inputs

Communication

Front port: USB, type C

Power Supply with Auxiliary voltage

 – DC: 24 V to 240 V
 – AC: 60 V to 240 V

Measuring Input

O 1/5 A, 50/60 Hz

Functionality

The Arc Protection device is equipped with the following functions:

•Detection of arcing faults using point-type or line-type optical sensors
•Continuous self-supervision of the device and all connected optical sensors
•Four high-speed binary outputs for rapid signaling and tripping operations
•Minimum of 11 LED indicators for clear visual representation of operational status and alarms
•Optional current transformer (CT) inputs for phase and ground fault current verification (e.g., 50AFD/50GAFD functionality)
•Tripping logic configurable for arc detection alone or dual-criteria operation (arc detection combined with overcurrent check)
•Integrated circuit breaker failure protection functionality (e.g., 50BF)
• Wide-range auxiliary power supply compatibility:
 – DC: 24 V to 240 V
 – AC: 60 V to 240 V
 – Single variant supports full voltage range