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ball machine

r ≥ 3 m
r ≥ 3 m ≥ 100 KΩ
e.g. wood
≥ 100 KΩ r ≥ 3 m
e.g. 5 cm asphalt

Protection measures System Type Part No.
TN-S-System DEHNventil DV M TNS 255 951 400
Combined arrester (DIN rail)
TT-System DEHNventil DV M TT 255 951 310
Surge arrester (socket outlet) All system DEHNflex DFL M 255 924 396
Surge arrester (DIN rail) configurations DEHNrail DR M 2P 255 953 200
Interface Type Part No.
WLAN antenna DEHNgate DGA G BNC + angled fixing plate 929 042 + 106 329
Figure 9.23.3 Caddy / trolley shed with integrated driving range protected against surges as well as step and touch voltage

results of the risk analysis), further surge protection measures which activate the individual sprinklers are controlled by de-
upstream of the terminal device have to be provided (Figure coders. Data transmission and power supply for the valves (e.g.
9.23.3). 35 V/1 Hz, 1.1 A) is provided by a two-wire ring conductor. In
The same protection measures as for the club house or the some cases, this two-wire cable can be longer than 10 km.
caddy / trolley shed with driving range have to be taken for the Connecting cables to the magnetic valves, however, do not ex-
golf cart parking garage and the cart shed. ceed 150 m to limit any excessive voltage drop.
The long two-wire ring conductor and the extremely long
Irrigation system conductors to the magnetic valves provide the highest risk
Water is mostly is pumped from reservoirs. The necessary
pumps are installed in underground ducts and are controlled in terms of surges. In practice, therefore corresponding surge
and monitored from a service station (Figure 9.23.4). protective devices are installed on the two-wire ring conduc-
tor at intervals not exceeding 150 m. For locally earthing the
The pressurised water pipe runs throughout the entire golf surge protective devices, suitable corrosion-resistant earth-
course. Sprinkler systems which are supplied by branch pipes termination systems (earth rods or radial earth electrodes) are
water the individual greens and tees. The water flow is con- installed. These should be implemented simultaneously with
trolled via magnetic valves which are installed either directly the installation of the pressurised water reticulation pipe and
at the sprinkler or in ground-level boxes. The magnetic valves the two-wire ring conductor.

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