INSTALLA TION - Codan, Ltd.

Ku-Band MBUC M1 redundancy systemsEssential risk management for safeguarding personnel,protecting equipment, and dissipating lightningWARNINGPrecautions must be taken to ensure the installation is adequatelyprotected against voltage potential differences that may occur between theoutdoor and indoor equipment.These potential differences may occur:• if there is a fault in the AC mains reticulation system• when high power electrical machinery located nearby is switched on or off• if a lightning strike occurs in the areaIt is highly recommended that the antenna metal structures and the cases of the outdoorequipment be connected together and grounded with earth stakes, or in the case ofrooftop sites be connected to the lightning grid and earth system of the building. Theprotective earth screws on the modules provide this protection. This practice also reducesthe likelihood of the mains supply or RF interfering with the LAN and serial interfacesignals, noise interference to the IFL, and ESD protection.In the case of lightning strikes, large ground currents occur for several hundred metresaround a strike area, causing large voltage potentials between separate earth points. Forthis reason, some lightning engineers recommend the use of large copper earth straps (atleast 4 mm 2 cross-sectional area), or braid, to connect the indoor and outdoor equipmentearth systems.WARNINGWARNINGEquipment must be earthed in a star configuration. The centre connectionof the star must be bonded to the main earth for the site.For critical installations in lightning-prone areas, it is strongly advisedthat you seek expert advice on lightning protection.The consequences of unprotected system installations include loss of revenue due to:• downtime of the system• corrupted data and/or total loss of data• damage to equipment, including the possibility of fire• overcoming electrical hazards for personnelPage 12 of 18 12-50178-EN Issue 1, November 2009