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Grounding device ZNL is intended for special disconnection of air power lines by means of throw on the conductors of power line flexible non-insulated conductor and creation short circuit between conductors of power line and grounding conductor connected with the ground.
The main parameters of grounding device:
| Name of parameter |
Value of parameter
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| Nominal voltage of electrical installation, kV |
From 0,4 to 10 inclusive
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| Maximum admitting current of short circuit, kA, during 0,5 sec. |
10
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| Section of short-circuiting and grounding conductor, mm2 |
25
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| Length of grounding conductor, m |
15
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| Length of short-circuiting conductor, m |
1,7
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| Diameter of insulating fall-line, mm |
5
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| Length of insulating fall-line, m, not less |
20
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| Length of grounding pin, m, not less |
1,0
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| Diameter of grounding pin, mm, not less |
20
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Grounding device consists of:
• Throwing device in the form of grenade;
• Insulating fall-line;
• Accessory flexible copper conductor without sheath;
• Fixing armature-gripper for reliable connection of power line's wires together in loom and holding it during passage of short-circuiting current;
• Flexible copper escapement in polymer sheath connected with ground rod;
• Armatures for fixing free end of insulating fall-line;
• Temporary grounding pin.
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