ILSE’s Stormaster ESE

The ILSE® Stormaster ESE range of terminals provides a safe and efficient system for the protection of your facility from direct lightning strikes. The ILSE Stormaster ESE terminal captures the lightning energy at a preferred point.

The non-radioactive terminal conveys the energy to ground via downconductor(s). When the energy enters the dedicated lightning earth, it is safely dissipated without risk to personnel and equipment.

How does the ILSE Stormaster ESE Terminal work?

The Stormaster Early Streamer Emission air terminal uses the naturally occurring electrical field to complete the timely release of an upward streamer. This process provides for a safe and efficient method of controlling dangerous lightning energy at a preferred point.

As a thunder storm gathers overhead the ambient electrical field surrounding the Stormaster ESE begins to rise in voltage. Upon the approach of a downleader towards the protected area there is a rapid increase in the electric field which initiates the triggering of an upward streamer from the Stormaster ESE terminal. The concept of earlier allows for a larger or enhanced area of protection to be provided by the Stormaster ESE in comparison to a conventional rod.

With the release of the upward streamer from the finial tip earlier than other competing structural points, the Stormaster ESE terminal becomes a preferred point for the capture of the lightning discharge within the protected area.

 The Stormaster ESE Range

 Certified Performance

As one of the leading companies in the field of lightning protection,ILSE has invested heavily in field and laboratory testing as part of its on-going commitment to research and development.

Throughout the product development of the Stormaster ESE the proto-type models were subjected to intense testing under high voltage conditions. Following further refinements the Stormaster terminals were subjected to final testing by an independently accredited test laboratory which completed testing in full compliance with the French National Standard NF C 17-102. The final testing of Stormaster ESE terminals showed effective performance as defined in the French National Standard.

The objective of the testing under NF C 17-102 is to obtain a statistical result between a single reference rod and the ESE terminal whereby a time difference is obtained between the two and by definition, a triggering time advance ΔT is calculated. Safety margins are applied to the measured values in order to provide a conservative measured result.

Advantages of the Stormaster ESE Terminal

A typical Stormaster ESE installation consists of a single Stormaster ESE terminal with an enhanced area of protection and one or more downconductors connected to a dedicated low impedance lightning earth.

  • ILSE’s Stormaster ESE system is simple to install and requires no special maintenance.
  • ILSE’s Stormaster ESE system is a cost effective solution for providing your lightning protection whilst providing superior safety.
  • The Stormaster ESE range of terminals have been fully tested in accordance with NF C 17-102 in a high voltage laboratory.

Protection Performance

The protection radius (Rp) of a Stormaster ESE terminal is calculated using the following formula as defined by the French National Standard NF C 17-102 (July 1995).

Rp = √h(2D-h) + ΔT(2D + ΔT) for h≥5m where:

The following key parameters determine the calculation of Rp.

  • ΔT as established during the test.
    Stormaster-ESE-15 = ΔT (μs) 15
    Stormaster-ESE-30 = ΔT (μs) 30
    Stormaster-ESE-50 = ΔT (μs) 50
    Stormaster-ESE-60 = ΔT (μs) 60
  • h = actual height of Stormaster terminal above the area to be protected (m).
  • D (in m) depends on the selected level of protection, protection levels are specified in annex B of the standard NF C 17-102.
    D = 20m for protection level 1 (High Protection)
    D = 45m for protection level 2 (Medium protection)
    D = 60m for protection level 3 (Standard protection)