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Survei Microsoft: Pemimpin TI di Indonesia Prioritaskan Hybrid Cloud untuk Proses Transformasi TI

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MENENTUKAN JENIS DAN UKURAN KABEL LISTRIK

a.   Jenis kabel Berdasarkan penggunaanya dapat dibedakan menjadi : Kabel Power Digunakan untuk instalasi dalam gedung maupun dalam tanah. Berdasarkan tegangan maximum yang ditahan Low Voltage ( Beroperasi pada daerah tegangan 0,6-1 kV)Medium Voltage (( Beroperasi pada daerah tegangan 3,6-20 kV)High Voltage (( Beroperasi pada daerah tegangan 20-70 kV)Extra high Voltage (( Beroperasi pada daerah tegangan sampai 170 kV)Tabel Kabel Power Kemampuan hantar arus kabel tanah berisolasi dan berselubung PVC dengan penghantar tembaga ( NYA, NYM, NYY, NYFGbY dan sebagainya) Tegangan kerja maksimum 1,8 kV arus searah untuk kabel 1 core dan 0,6/1 kV sistem fasa-tiga untuk kabel dua, tiga dan empat core. Suhu keliling 300C, suhu penghantar maksimum 700C, tahanan panas jenis tanah 1000C cm/watt. Lihat table.1 berikut ini Kemampuan Hantar Arus Kabel Luas NYA NYM NYY NYFGbY&NYY NYFGbY&NYY NYFGbY&NYY Penampang Dlm Pipa Dlm Pipa 1 Core 2 Core 3 Core 4 Core Nominal Instalasi Instalasi Ditanah Di…

Membangun Building Management Systems / Environmental Management Systems

Building Management Systems / Environmental Management Systems A Building Management System (BMS) or a (more recent terminology) Environmental Monitoring Systems (EMS) is a computer-based control system installed in buildings that controls and monitors the building’s mechanical and electrical equipment such as ventilation, lighting, power systems, fire systems, security systems and many more. A BMS or EMS consists of software and hardware; the software program, usually configured in a hierarchical manner, can be proprietary, using such protocols as C-Bus, Profibus, and so on. Vendors are also producing BMSs that integrate using Internet protocols and open standards such as, BACnet, LonWorks and Modbus. Building Management Systems are most commonly implemented in large projects with extensive mechanical, HVAC, electrical, and plumbing systems. Systems linked to a BMS typically represent 40% of a building's energy usage; if lighting is included, this number approaches to 70%. BMS s…