Lightning protection

SAdS15z

Maximum operating voltageUp to 17.5 kV
Protection typeAgainst direct & indirect lightning
Installation3 products per pole
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Preview sads15z 1
Preview sads15z 2
Preview sads15z 3

LLPD SAdS15z is intended for protection of overhead lines with the highest voltage for equipment up to 17.5 kV and high short-circuit currents against direct lighting strikes, back flashovers and induced overvoltages, as well as their deleterious consequences.

Operational Principle

The Operational Principle is based on the EasyQuench Technology.

The variable length of electrodes and different attachment solutions makes the SAdS15z adaptable to any type crossarm installation.

Overall Dimensions

Medium sads15z 4

Performance specification and characteristics

SAdS15z and the line
Highest voltage for equipment up to 17.5 kV
Maximum prospective fault current*, kA 5
Rated frequency, Hz 50 (±12)
Power frequency withstand voltage (for minimal 140 mm air gap), kV
70
SAdS15z and lightning
High current impulse (4/10 μs), kA 65
Lightning discharge capability** (200 μs), C 2.4
Maximum fault quenching lightning current (8/50 μs), kA 20
Minimum withstand amount of operations 10
Additional power losses on the line, % 0
Weight, kg 2.6
Average life time expectancy, years 20 to 30
UV resistance***, h 1000
Time to install/pole, min. 10 to 20
Maintenance 1 visual verification per year
Additional Equipment cross-arm fitting and conductor clamp + jumper

* Maximum calculated short-circuit current in LLPD’s location;

** According to IEC 60099-8;

** According to ISO 4892-2, method A, IEC 62217.

Installation

1 piece per phase for each circuit on one pole for ensuring comprehensive protection of an overhead line against DLS, BFO and IOV.

LLPD SAdS15z must be installed with an air gap between upper and lower electrodes. In order to select the proper value of the gap, please refer
to the table.

Insulator’s CFO (kV)

SAd15z: Air gap, mm

SAdS15z: power frequency withstand voltage, kV

<140

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160

80-100

65

55

180

100-120

70

60

200

120-140

75

65

220

140-160

80

70

240

160-180

85

75