Line arresters for alternating current overhead power lines (OPL) with voltages from 35 to 330 kV are designed to protect line insulation from lightning overvoltages. They are manufactured according to TU 27.12.10-048-21639232-2021 and have the following technical characteristics:

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Charge transfer capability: 1.4 and 1.7 C.

Nominal discharge current: 10 kA.

Safe failure current:

• duration of at least 1 s — at least 0.6 kA;
• duration of at least 0.2 s — at least 65 kA.
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External insulation design: for areas with the first degree of atmospheric pollution (I SP).

Climatic design and placement category: according to GOST 15150 — UHL1.

Arrester designation includes the following parameters:

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Network voltage class: 35, 110, 220, or 330 kV.

‍Arrester nominal voltage: 40.5; 75; 150; or 216 kV.

Residual voltage during lightning impulse currents of 8/20 µs duration: for currents of 5, 10, and 20 kA.

Residual voltage during switching currents of 30/60 µs duration: for currents of 250, 500, and 1000 A.

Residual voltage during steep impulse current of 5 kA and 1/10 µs duration.

Spark gap length: from 240 to 1200 mm depending on the model.

Example of designation: LR-P–35/40.5/10/1.4, where:

• LR-P — polymer line arrester.
• 35 — network voltage class, kV.
• 40.5 — arrester nominal voltage, kV.
• 10 — nominal discharge current, kA.
• 1.4 — charge transfer capability, C.