FLA-3
Line Fault Detector
The Model FLA3 Line Fault Detector from P&R Technologies/EMG detects fault currents, temporary faults, and transient currents in overhead power lines. FLA3 detectors are installed directly on the distribution power line and indicate current faults with six red LED’s at nighttime or a bright orange flag in daytime. Rugged, sealed enclosure. Remote control operations and settings.
FLA-3 Remote Control
FLA3 Fault Indicators
1. Ring of six LEDs indicates line fault
2. Orange flag also indicates line fault (see fully revealed flag in top photo)
3. Single LED indicates remote control readiness and error states
Opening FLA-3 Clamp
FLA-3 Installation Sequence
Applications
The FLA3 mounts directly to any live conductor from 8-28 mm and can be installed by hot stick. A spring loaded clamp firmly attaches the FLA3 to the conductor. The FLA3 is powered by 20A or greater line current. All the electronics, power supply, radio module (which enables communication with a remote control), and battery are housed in a rugged sealed enclosure. Trip current, minimum impulse duration, reset time, and reset mode can be adjusted via remote control without disabling or dismounting the FLA3. The FLA3 can also be tested from the ground with the remote control.
Settings & Specifications
The FLA3 features rugged, hermetically sealed construction and can be easily configured for most installations and applications:
- Reset Time Delay: 30–720 min (12 hrs) in 30 min steps.
- "Reset via recovering current" can be activated or disabled.
- Operating current short circuit: 40–1500A in 20A steps, or automatic adaptation of the trip threshold as a percentage of the service current (150%–500%).
- Minimum impulse duration: 40–300ms in 20ms steps.
- Temperature Range: -20 C to +70 C.
- Dimensions: 70mm diameter, 170mm high
- Protection: Class IP67 (hermetically sealed)
- Backup Power Supply: Lithium battery
Operation
After installation on a live line, the FLA3 continuously measures and evaluates the current. If current exceeds the preset operating value, a short circuit will be indicated. Alternatively, “automatic mode” can be chosen via remote control. In this mode, the trip threshold can be set with the remote control from 1.5X to 5X as high as the service current. The remote control can also be used to:
- Set minimum impulse duration, so that short current peaks (e.g., caused by switching currents shorter than 60 ms) will not be indicated as a fault. Duration can be set between 40ms and 300ms in 20ms steps.
- Adjust reset time in 30 min steps between 30 min and 720 min. During this time, six LED’s blink once per second. At the same time, the FLA3 mechanically displays a visible orange area. An identifying number from 1 to 9 is printed in white on each FLA3. Only one FLA3 with the same number can be use within 100m of the remote control.
Ordering Information
FLA3 Part No. PR40-20-10
Remote Control Part No. PR40-90-30
Adapter Bayonet 15 Part No. PR40-90-08
Adapter Ring Part No. PR40-90-09
