Most of the tunnel equipment and systems require electrical energy to operate. Therefore, equipment for supplying power to the tunnel must be installed. This installation has to satisfy two essential requirements: Meet the needs under all operational situations (normal, degraded, critical, emergency).
A wide variety of LV electrical distribution equipment can be required on a tunnel project. Main LV supplies into tunnels are often provided with a back-up stand-by generator and our Mains Distribution Assemblies (MDAs) can incorporate Manual or Automatic Changeover systems to switch between Mains and Stand-by power.
Meet the needs under all operational situations (normal, degraded, critical, emergency). The power required for supplying a tunnel is directly related to the nature and number of equipment installed in it. Depending on the amount of electrical energy required (kWh), power may be supplied in low voltage or high voltage (Fig. 1).
A typical arrangement would be to install a 50 kVA step-up, 400:1000V transformer at the entrance to a tunnel and install 10 no. 5 kVA 1000:110V Tunnel Transformers at 300 metre centres along the tunnel (the transformers to be located at the mid-point of each 300M section).
Each country has its own regulatory requirements with regard to tunnels and a specific structure in terms of distribution networks: therefore, the architectures retained may be significantly different in tunnels
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Battery cabinets that are not supplied with an incorporated DC output disconnect device must have an appropriate disconnect device provided external to the cabinet.
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If the battery cabinet needs to be scrapped it is essential to entrust the equipment solely and exclusively to firms specializing in the disposal of the materials making up the system.
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1.TO HELP PREVENT DAMAGE, ALL PANELS FROM ALL BATTERY CABINETS SHOULD BE LABELED TO THEIR PROSPECTIVE CABINET, REMOVED AND PUT ASIDE IN A SAFE
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The instructions in this manual are intended for a SKILLED TECHNICIAN (paragraph 2.2.1) to provide information on how to install and maintain the battery cabinet of the Keor DK R/T series.
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For cabinet installation drawings, see Battery Cabinet Installation on page 6, which contains detailed drawings and guidelines for installing the cabinet and battery module.
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Proper tunnel guard design ensures reliable containment, serviceability, and compliance. The following sections detail the engineering topics most critical for success.
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Battery cabinets that are not supplied with an incorporated DC output disconnect device must have an appropriate disconnect device provided external to the cabinet.
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In order to cope with the extreme conditions, BS6164 provides valuable guidance on voltages, equipment enclosures, cabling, electrical protection and lighting systems to be used in tunnels.
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The purpose of this manual is to provide the skilled technician (see paragraph 2.2.1) with instructions for safely installing the modular battery cabinet Keor MOD, also called “equipment” in the rest of the
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