V/10ft
1950 600
37,716 166 125,722 553 251,443 1,105 628,608 2,763 1,257,216 5,526 2,514,433 11,052 2,155,228 8,289
sale with a satisfactory lightning immunity.
In the past, some manufacturers (thankfully, no longer trading) released decoders with minimal lightning testing, ‘hoping for the best’. Because not every site gets a lightning strike, it was not possible to gauge the effectiveness of the designed- in protection until a large number of sites had been equipped and had been operational for a number of years. By this time, any shortcomings could not be rectified practically for the installed base. This historical fact has tainted the perception of many erstwhile users of decoders against their use today.
Conclusions:
With all decoder systems that use earth stakes, the stake MUST be grounded within a
1,077,614 4,145 1,885,825 6,447 538,807 2,072 942,912 3,224 1,676,289 5,158
few feet of the decoder and solenoid for protection to be effective. Where a decoder has an earth wire coming out, lightning protection for it will be minimal unless a grounded stake is attached.
With the alternative floating lightning protection system, only one earth stake is required at the controller. Additionally, the solenoid can be a great distance from the decoder with no loss of lightning protection. However, this technique can be practical only with simple decoders.
To make a decision on where to be on the compromise of cost versus number of failures/year, pre-testing of the product’s lightning protection is mandatory.
About the author: Tony Ware B. Sc., is managing Director of Tonick Watering Ltd. He can be contacted by email on:
tony@tonick.co.uk Website:
www.tonick.co.uk
Manufacturers of Aluminium Drag brushes. Suppliers of all types of maintenance equipment & sports consumables.
U.K. importers & Distributors of the amazing Cleansweep & Greensweep
215,523 829 471,456 1,612 838,144 2,579 1,508,660 U.K. Distributors Of Hoerger Machines 107,761 414 188,582 645 419,072 1,289 754,330
2275 700
32,328 124 94,291 322 167,629 516 377,165
V/10ft
2600 800
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V/10ft
2925 900
25,144 77 75,433
V/10ft
3250 1000
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