LLPD dM35z up to 40.5kV
- Protection against:
Induced overvoltage,
Back Flashover
- Highest voltage for equipment, kV40.5
- Maximum prospective fault current, kA5.0
- Lightning discharge capability, C2.8
- Installation1, 2 or 3 pcs per pole
This device is designed to protect power supply networks from the consequences of either direct lightning strikes or induced overvoltages. Indented to be installed along the protected line, it works perfectly on distribution lines with the highest voltage of equipment up to 40.5 kV.
Line lightning protection device dM35z has successfully passed different tests in a number of laboratories, including a full series of test at CESI (Milano) in 2019, which confirms its ultimate reliability. It also enables the expected life time to be up to decades.
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 | 40.5 |
Maximum prospective fault current, kA | 5 |
External air gap, mm | 115-180 |
50% flashover voltage (180 mm air gap), kV | <200 |
Power frequency withstand voltage**, kV (wet/dry) | 65/80 |
Lightning parameters
Lightning discharge capability (200 μs)***, C | 2.8 |
High current impulse (4/10 μs), kA | 65 |
Maximum quenching lightning current, kA | 20 (8/50 µs) |
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 | 6.2 |
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