Arc-Flash Detection
PGA-LS30 Series
Fiber-Optic Sensor
Description
The PGA-LS30 series Fiber-Optic Sensor is an arc-detection sensor that uses fiber to detect arcs anywhere along its length.
This sensor is meant to be installed with the fiber along the back wall of switchboards to form the detection range across
many compartments with just one sensor. The sensor is positioned to allow direct line of sight to all powered connections
where an arc could develop. The sensor is capable of detecting the light from an arc flash from all angles. The detection
radius is dependent on the arc power. The sensor is calibrated at the factory for 60 cm (24 in) of fiber in each monitored
compartment. When using a fiber-optic sensor in compartments with less than 60 cm (24 in) of fiber, the sensitivity may
have to be adjusted so that the sensor will detect arcs of 3 kA or more. This fiber-optic sensor and the arc-flash relay
provide superior protection against the damaging effects of arc flashes and improve the lifespan of electrical equipment
as well as the protection of personnel. This sensor is intended to be installed as part of an active arc flash mitigation
system that uses Littelfuse arc-flash relays.
Features & Benefits
FEATURES
BENEFITS
Allows fiber to be placed only where light needs to be measured;
copper wiring can easily be extended or installed in existing cable
channel or tight corners
Transmitter and receiver design with copper wiring
to relay
Can be installed easily and reliably in different sizes and shapes
of switchboards or panels
Rugged and flexible 5 cm bending radius
Length: 18 m active, 20 m total
Protect many areas with one sensor
Applications
• For use with Littelfuse arc-flash relays
Specifications
Type
Detection Zone
Output
Fiber-optic sensor
360° along fiber
0–35 mA
Electrical Cable
Factory Cable Length
Shielded 3-wire 20 AWG (0.5 mm2) electrical cable
18 m (59 ft) active; 20 m (66 ft) total (2 m (7 ft) shielded)
2 x 10 m (33 ft) electrical cable
Max. Elec. Cable Length
Sensor Check
Dimensions
50 m (164 ft)
Built-in LED for visual feedback
Transmitter and Receiver: 32 x 56 x 19 mm (1.3 x 2.2 x 0.7 in)
IP 30
Enclosure
Littelfuse.com/PGA-LS30
©2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/09/2023
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