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LOK20
Fault indicator for medium voltage overhead lines.
Also available in presentation mode…
Fault Indicator for Medium Voltage Overhead Line:
- intended for fast fault finding
- flashlight indication, visible at least 300 m
- reliable operation, independent of geometrical configuration of conductors
- self-testing
- infra-red remote control
- solar panel for continuous battery charging
- simple installation
- minimum maintenance
General description
Fault indicator LOK 20 was designed for fast faults locating on medium voltage overhead lines. It detects faults by monitoring magnetic field strength and phase changes.
LOK 20 should be placed on poles of important network sections. When line fault occurs, only indicators installed between feeding substation and the fault will activate its flashlight signal.
Flashlight signal is visible in bright daylight at least from 300 m. Every fault is registered also on LCD display - fault counter, located on the front panel. The battery is charged by solar panel, placed on the pole above the device.
Technical data
| Range of application: |
- medium voltage overhead line - wooden, concrete or metal poles - independent of geometrical configuration of conductors mounted on pole |
|---|---|
| Fault types: |
- earth fault - short circuit |
| Fault current threshold at earth fault: | settable 8, 15, 30 A |
| Fault duration: | 80 ms .... 2s |
| Faults separation: |
- two faults, separated for less than 0.6 s are counted as one fault - two faults, separated for more than 0.6 s are counted as two faults |
| Distance to conductors: | settable with a jumper: 4, 5, 6, 7, 8, 10, 12, 14 m |
| Fault Indication: |
- flashlight, duration 2 hours or until the indicator is reset by IR remote control - on LCD display - fault counter |
|
Self-testing: |
- activated by a pushbutton (TEST) located inside indicator - by IR remote control, distance up to 15 m - test result is signalized by flashlight and on LCD display |
|
Battery: |
- maintenance-free lead acid battery 6 V, 3.5 Ah - continuously charged by solar panel - lifetime: 5 years |
|
Operating enviroment: |
- line frequency: 50 Hz - temperature range:- 25 °C... +65°C |
|
Mechanical realization: |
- aluminium housing, degree of protection: IP55, dimensions: 260 x 160 x 90 mm - support panel with screws - solar panel: 310 x 310 x 40 mm - solar panel support with screws |
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