Aug 092013
 

Selamat Idul fitri semua!! Mohon maaf lahir batin kalau kesalahan dalam kata, tulisan dan perbuatan. Semoga di hari depan kita bisa lebih baik.

Dibawah ini adalah beberapa langkah singkat yang bisa dipakai untuk mengestimasi dalam perhitungan kelistrikan.
Cable Capacity:

Objectives rule of thumb
Kapasitas arus kabel dengan konduktor Cu (sampai dengan ukuran 30 sqmm) 6 x ukuran konduktor dalam sqmm
Kapasitas arus motor 1 phase (230 VAC) 4.5 Amps per HP
Kapasitas arus motor 1 phase (230 VAC) 6 Amps per kW
Kapasitas arus motor 3 phase (380 VAC) 1.5 Amps per HP
Kapasitas arus motor 3 phase (380 VAC) 1.9 Amps per kW
Arus tanpa beban motor 3 phase 30% of FLC (full load current)
kW motor HP x 0.75
Tahanan grounding untuk single pit 5 \Omega
Tahanan grounding untuk earthing grid 0.5 \Omega
Tegangan Neutral dan Earthing \leq 2 volt
Resistansi Neutral ke Grounding (solid grounding system) \leq 1 \Omega
Creepage Distance((Moderate Polluted Air) 18 to 22mm/KV
Creepage Distance((High Polluted Air) 25 to 33mm/KV
Minimum bending radius HV cable single core 14x of outer diameter
Minimum bending radius HV cable three core 10x of outer diameter
Minimum bending radius LV cable o\armored single core 10x of outer diameter
Minimum bending radius LV cable o\armored three cores 8x of outer diameter
Minimum bending radius LV cable o\non-armored single core 8x of outer diameter
Minimum bending radius LV cable o\non-armored three cores 6x of outer diameter
Diesel Generator Typical Fuel Consumption 0.26 Ltr/kWh
Requirement Area Diesel generator 56 sq.m (for 25 – 48 kW)
65 sq.m (for 100 kW)
DG less than or equal to 1000kVA must be in a canopy
DG greater 1000kVA can either be in a canopy or skid mounted in an acoustically treated room
DG noise levels to be less than 75dBA @ 1meter
Insulasi untuk rotating machine (kV+1) M\Omega
Test Voltage (A.C) for Meggering (2X Name Plate Voltage) +1000
Test Voltage (D.C) for Meggering (2X Name Plate Voltage).
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