LLPD d69z up to 72.5kV
- Protection against:
Induced overvoltage,
Back Flashover
- Highest voltage for equipment, kV72.5
- Maximum prospective fault current, kA5.0
- Lightning discharge capability, C2.8
- Installation1, 2 or 3 pcs per pole
This device is there to protect important networks from direct lightning strikes and back flashovers. Indented to be installed along the protected line, it works perfectly on distribution (sub-transmission) lines with the highest voltage of equipment up to 72.5 kV.
LLPD d69z ensures lightning protection of insulators from flashovers as well as overhead lines from power outages caused by insulation flashover and subsequent fault current flow.
Electrical line parameters
Lightning parameters
General Parameters
* According to IEC 60038, ** According to IEC 60071-1, *** According to IEC 60099-8, **** According to ISO 4892-2, method A, IEC 62217
Highest voltage for equipment*, kV | 72.5 |
Maximum prospective fault current, kA | 5 |
External air gap, mm | 80+80+120 |
50% flashover voltage (75+75+115 mm air gap), kV | <400 |
Power frequency withstand voltage**, kV (wet/dry) | 140/140 |
Lightning parameters
Lightning discharge capability (200 μs)***, C | 2.8 |
High current impulse (4/10 μs), kA | 65 |
Maximum quenching lightning current, kA | 20 (8/50µs) |
Minimum withstand amount of operations | 10 |
General Parameters
Additional power losses on the line, % | 0 |
Average expected lifespan, years | 30 |
UV resistance****, h | 1000 |
Weight, kg | 9.3 |
Maintenance | 1 visual verification/ year |
* According to IEC 60038, ** According to IEC 60071-1, *** According to IEC 60099-8, **** According to ISO 4892-2, method A, IEC 62217
The i20z’s works due to the EasyQuench technology.
This innovative operating principle ensures a high ability to discharge excessive energy of an overvoltage in the surrounding atmosphere.
The induced overvoltage will create an electrical power arc between the terminal electrode of an LLPD and the conductor clamp on a line. At first, the arc will be divided by a series of discharge chambers into a series of small arcs, which afterward are quickly quenched when the oscillating current of the grid crosses zero.
This innovative operating principle ensures a high ability to discharge excessive energy of an overvoltage in the surrounding atmosphere.
The induced overvoltage will create an electrical power arc between the terminal electrode of an LLPD and the conductor clamp on a line. At first, the arc will be divided by a series of discharge chambers into a series of small arcs, which afterward are quickly quenched when the oscillating current of the grid crosses zero.
Examples of installation methods