Helita Pulsar E.S.E Lightning Conductor


Product Name：Helita Pulsar E.S.E Lightning Conductor
Product Model：Pulsar 30,Pulsar 45,Pulsar 60
Updated：2010.03.29
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PULSAR

PULSAR, THE HIGH PULSE VOLTAGE E.S.E. LIGHTNING CONDUCTOR

OPERATING PRINCIPLE

When the lightning approaches the ground, a luminous ascending brush discharge is initiated at the lightning conductor. In the case of a Franklin rod, this ascending brush discharge propagates in the direction of the descending leader after a long transition phase. The Pulsar initiation advance permits to reduce the required time for the formation and continuous propagation of the ascending discharge and brings thus a higher efficiency for the lightning capture than a Franklin rod tip.

AN EFFICIENT INITIATION ADVANCE

Thanks to its initiation advance, the Pulsar emits a high voltage signal at clearly determined and controlled frequency and amplitude. Its effectiveness is guaranteed by the rapid formation and propagation of the upward leader, while reducing the development of space charges around the point.

ENERGY AUTONOMY

The Pulsar is also self-contained. It draws its energy from the ambient electric field existing at the time of the storm (10 to 20 kV/m). The initiation advance starts up as soon as the ambient field exceeds a peak value which corresponds to the minimum lightning stroke risk.

Operation of a PULSAR
1 . The Pulsar tip plays a triple role:
- Collect the energy necessary to power the electrical device contained in the cylinder,
- Emit the brush discharges created by the high-voltage pulses,
- Capture the lightning current to convey it to the ground. The metal disc is the upper part of the external air gap designed to convey the lightning current from the tip to the ground.
The metal cylinder contains the electric device of the Pulsar system that generates the brush discharges.
The pole serves to fix the Pulsar for installation.
The connecting clamp must be fixed to it, together with the down conductor.

1 Tip 75 cm long and 18 mm diameter.
2 Metal disc with variable diameter and thickness for the different Pulsar models.
3 Metal cylinder containing the early streamer emission device.
4 Pulsar pole outside diamètre 30 mm.
5 Connecting clamp to fix the down conductor.

Pulsar references

ΔT
(μs)		 Description Reference L(m) Weight
(kg)
30 Pulsar 30 stainless steel 2 m Lightning conductor HO IMH 3012 2.0 5.0
45 Pulsar 45 stainless steel 2 m Lightning conductor HO IMH 4512 2.03 5.3
60 Pulsar 60 stainless steel 2 m Lightning conductor HO IMH 6012 2.06 5.7

      

The protection radius is calculated according to Annex A in French standard NF C 17-102. For Pulsar 60, limiting the value of ΔT used in the protection radius calculations to 60 μs has been validated by the experiments conducted by the members of Gimelec (Groupement des industries de
l’équipement éléctrique, du contrôle-commande et des services associés, Group of Industries forMaterials for Electrical Equipment and associated Industrial Electronics).

Rp : Radius of protection in a horizontal plane located at a
vertical distance h from the Pulsar tip
h : Height of the Pulsar tip above the surface(s) to be
protected
D : Standardized striking distance
ΔL = 106 .ΔT (initiation advance)
Rp : √ h (2D - h) + ΔL (2D + ΔL) (for h ≥ 5 m)
For h < 5 m, refer to the table below
ΔT = Initiation advance measured during efficiency tests
according to Annex C of French standard NF C 17-102

Pulsar radius of protection

Level of protection I (D = 20 m) II (D = 30 m) II (D = 45 m) II (D = 60 m)
Pulsar Pulsar30 Pulsar45 Pulsar60 Pulsar30 Pulsar45 Pulsar60 Pulsar30 Pulsar45 Pulsar60 Pulsar30 Pulsar45 Pulsar60
h (m) Radius of protection RP (m)
2 19 25 32 22 28 35 25 32 40 28 36 44
3 28 38 48 33 42 52 38 48 59 42 57 65
4 38 51 64 44 57 69 50 65 78 57 72 87
5 48 63 79 55 71 86 63 81 97 71 89 107
6 48 63 79 55 71 87 64 81 97 72 90 108
8 49 64 79 56 72 87 66 83 99 75 92 109
10 49 64 80 57 72 88 66 83 99 75 92 109
15 50 65 80 58 73 89 69 85 101 78 95 111
20 50 65 80 59 74 89 71 86 102 81 97 113
45 50 65 80 60 75 90 75 90 105 89 104 119
60 50 65 80 60 75 90 75 90 105 90 105 120