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The High Voltage DC Live Line Indicator (LLI) is a battery operated electronic unit that has been specifically designed to test DC systems - with particular relevance to Mass Transit Railway (Metro) & Tram based models.
Although usually applied to overhead catenaries they can also be used on 'third rail' installations. Proving that the system is de-energised - and can thus be safely earthed - is important to both maintenance staff and system security. The DC LLI gives both visual (high intensity flashing red LED’s) and audible (70dB) alarm should a conductor under test indicate as live.
Metrohm LLI3000 Specifications
Voltage Ranges
3000 V DC.
Std Thresholds
1000 V DC (can be adjusted for particular requirements).
Resistor Chain
6 MΩ.
Operating Time
5 mins Nominal.
Visual Indication
LED.
Status - Alarm
Red Flash @ 2 Hz.
Status - Safe
Green Flash @ 2 Hz.
Audible Indication
Buzzer, 3.1 kHz Tone Modulated @ 2 Hz
70 dBA @ 1.5m.
Measuring Current
0.50 mA Nominal @ Rated Voltage.
Response Time
1 Second Maximum.
Battery Life
250 Operations Minimum.
Metrohm LLI3000 warranty
One-year.
For more information on Metrohm DC LLI3000V talk to Cuthbertson Laird Group
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