ACR Electronics Nauticast 2625 Manual de Instalação descarregar pdf (Página 52)

Installation Manual 48 Y1-03-0204 Rev.K

9 Appendix

9.1 Samples for battery calculation

9.1.1 Typical Installation

GMDSS Battery size calculation for 1 hour (Battery size calculation based on the IMO regulations

Chapter IV - Reg.13)

Ship Name QMIII

Battery capacity 230Ah

Battery Type 2x (12V / 135)

Area A1, A2, A3

Battery located in battery chest on observation deck

Pos

Qty.

Equipment

I-max

(A)

I-standby

(A)

Total (A)

(I-max/2 + I-standby )*Qty.)

Skanti TRP 8751D Radiotelephone

45,00

3,00

25,50

Debeg 3818 DSC Controller

0,21

T&T 3020 Inmarsat-C Transceiver

3,20

0,40

4,00

Inmarsat-C Monitor

0,85

1,70

Inmarsat-C Printer

1,00

0,20

1,40

CI 8501 Navtex Receiver

0,50

Skanti USE 300 VHF Radiotel.

2,80

0,05

2,90

Debeg 3817 VHF DSC Controller

0,21

0,42

Sailor RT2047 VHF Radio Tel.

6,50

1,00

4,25

Simrad GN 33 GPS

0,63

Koden KGP 900 GPS

4,00

0,63

2,63

Koden LR 771 Loran C

0,42

Emergency light

2,00

AIS Nauticast

7,00

0,75

0,84

Total

46,98

partly discharged battery

= Total consumption x 1,25 =58,73 Ah

-30°

= K1 x 1 / 0,30 106,78 Ah

K5 =K1

-30°

/ 0,65 164,28 Ah

Selected Battery (K5) = 230,00 Ah

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)

-30°

correction factor taking care that the battery may be used

at ambient temperature of - 30 degress

(at -30 degrees the battery has only 30% of nominal capacity)

K5 = correction factor taking care of that the battery

is defined by manufacturer for 5 hours discharge time

Calculation for AIS =

transmit pulse length 26,6ms with a maximum repetition rate of 2 seconds results in a maximum of 30

pulses/minute  1800 pulses/hour x 26,6 ms  47880 ms  47,88 seconds transmit time during one

hour 47,88 seconds  0,8 minutes  0,0133 hours transmitting time during one hour operation

 Up-Rounded to 0,02 hrs transmitting time

Above mentioned calculation assumes that all equipment is in operation which is normally not valid,

that means that the actual consumption is lower.

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