Sealite SL-300-1D5 Series, Инструкция по установке и обслуживанию

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Power Supply
Design Considerations
Long range lanterns are designed to operate over a wide operational voltage range and thus the
average power consumption will vary accordingly. The lanterns incorporate a dynamic intensity limit
as part of the thermal management system that ensures operates within the thermal design window. In
practice the thermal management cap limits a lanterns average power to a practical thermal limit of the
lantern in order to prevent overheating.
Power Supply Design Considerations
As discussed in IALA Guide 1067-2, there are vast array of power sources that can be utilised for
power lanterns. However the vast majority of customer power supplies comprise of either Photovoltaic
Power or AC Utility and as such this bulletin will focus on these types and how they apply to Sealite
SL-300 long range lanterns.
Contact Sealite for advice when designing your power supply. As additional
consideration is require when design power supply solution for operating multiple
lanterns from a single power supply solution.
(1) PV Power Systems
These systems generally comprise of a 1 or more PV panels, a solar regulator and storage
battery.
Batteries such as marine grade SLAs are very tolerant of fast switch high peak currents as
they electrically behave like a large smoothing capacitors. As detailed in IALA 1067 Solar
sizing depends on a number of factors. For Sealite lanterns, pay particular attention to
average power consumption and power cable sizing.
(2) Alternating Current (AC) Utility Power
In their simplest form, these systems comprise an AC/DC power supply convertor. Unlike PV
Power Systems, AC/DC Power Supplies are limited to their internal storage capacity and as
such are not able to maintain voltage regulation to fast switch currents.
As such a lantern’s peak current must be determined when selecting an AC/DC power supply.
For Sealite’s long range lanterns, the peak current can be determined by using the following
equation:
Peak current (A) = Peak Power (W))/(Supply Voltage (Vdc)
Using this method the peak current for the SL-300 Long range lantern is:
SL-300-1 : Peak Current (A) = 384 / 24 = 16A
SL-300-2 : Peak Current (A) = 768 / 24 = 32A