ACR Electronics NAUTICAST INLAND AIS Installation Manual

Also see for NAUTICAST inland AIS: Manual Installation manual Manual Manual User manual

Contents

Installation Manual 50 Y1-03-0212 Rev.B9 Appendix9.1 Samples for battery calculation9.1.1 Typical InstallationGMDSS Battery size calculation for 1 hour (Battery size calculation based on the IMO regulationsChapter IV - Reg.13)Ship Name QMIIIBattery capacity 230AhBattery Type 2x (12V / 135)Area A1, A2, A3Battery located in battery chest on observation deckPos Qty. Equipment I-max(A)I -standby(A)Total (A)(I -max/2 + I -standby )*Qty.)1 1 Skanti TRP 8751D Radiotelephone 45,00 3,00 25,502 1 Debeg 3818 DSC Controller 0,21 0,213 2 T&T 3020 Inmarsat-C Transceiver 3,20 0,40 4,004 2 Inmarsat-C Monitor 0,85 1,705 2 Inmarsat-C Printer 1,00 0,20 1,406 1 CI 8501 Navtex Receiver 0,50 0,507 2 Skanti USE 300 VHF Radiotel. 2,80 0,05 2,908 2 Debeg 3817 VHF DSC Controller 0,21 0,429 1 Sailor RT2047 VHF Radio Tel. 6,50 1,00 4,2510 1 Simrad GN 33 GPS 0,63 0,6311 1 Koden KGP 900 GPS 4,00 0,63 2,6312 1 Koden LR 771 Loran C 0,4213 1 Emergency light 2,00 2,0014 1 AIS Nauticast 7,00 0,75 0,84Total 46,98K1 partly discharged battery = Total consumption x 1,25 =58,73 AhK1-30° = K1 x 1 / 0,30 106,78 AhK5 =K1-30° / 0,65 164,28 AhSelected Battery (K5) = 230,00 AhK1 partly discharged battery =correction factor taking care that the battery might not be fully charged(we assume that in worst case the battery is only at 80% fully charged)K1-30° =correction factor taking care that the battery may be usedat ambient temperature of - 30 degress(at -30 degrees the battery has only 30% of nominal capacity)K5 = correction factor taking care of that the batteryis defined by manufacturer for 5 hours discharge timeCalculation for AIS =transmit pulse length 26,6ms with a maximum repetition rate of 2 seconds results in a maximum of 30pulses/minute Î 1800 pulses/hour x 26,6 ms Î 47880 ms Î 47,88 seconds transmit time during onehour 47,88 seconds Î 0,8 minutes Î 0,0133 hours transmitting time during one hour operationÎ Up-Rounded to 0,02 hrs transmitting timeAbove mentioned calculation assumes that all equipment is in operation which is normally not valid,that means that the actual consumption is lower.