Code: Msp – Cr – Sp/lp – O
Msp – CA – Sp/lp – O/p
Msp – CAU – Sp/lp – S/O/P/p
The single-phased earthing device is utilized on round conductors in HV/MV substations.
The phase clamp can be classic reduced (Cr), automatic (CA) or universal automatic (CAU).
The Cr classic reduced clamp and the CAU universal automatic clamp have an extruded aluminum alloy body, the CA automatic clamp contains a molded body made of aluminum alloy, all the clamps having a tightening screw provided at the end with a bayonet coupling system for the connection with the insulating sticks.
The earthing is made with the manual earthing clamp.
The single-phased earthing device is delivered in sets of 3 pieces in a transport bag / case.
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General characteristics for the single-phased earthing devices for round conductors |
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Earthing cable section Sp (mm2) |
16 |
25 |
35 |
50 |
70 |
95 |
120 |
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Nominal short-circuiting current for t = 1s Isc (kA) |
3,5 |
6 |
8 |
12 |
16 |
20 |
30 |
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Nominal peak currrent for t = 0,02 s Isd (kA) |
8,75 |
15 |
20 |
30 |
40 |
50 |
75 |
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Testing shortcircuiting current for t = 1s (kA) |
4,6 |
6,9 |
9,2 |
13,8 |
18,4 |
23 |
34,5 |
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Testing peak current for t = 0,02 s (kA) |
11,5 |
17,25 |
23 |
34,5 |
46 |
57,5 |
86,25 |
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Maximum length of the earthing cable lp (m) – classic reduced clamp (Cr) |
17,5 |
17,5 |
17,5 |
17,5 |
17,5 |
10 |
10 |
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Maximum length of the earthing cable lp (m) – automatic clamp (CA) |
8 |
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Maximum length of the earthing cable lp (m) – universal automatic clamp (CAU) |
10 |
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Peak factor (SR EN 61230) |
2,5 |
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Type of phase clamp |
Classic reduced |
Automatic |
Universal automatic |
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Diameter of the conductor on which can be applied |
17 ÷ 32 |
17 ÷ 32 |
9 ÷ 32 |
The single-phased earthing device is composed of:
– Phase clamp – 1 piece
– Earthing cable – 1 piece
– Earthing clamp – 1 piece