Acclaim Lighting Dyna Graze HO Exterior DMX, User Manual

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In-rush currents
Although LED fixtures are low power devices compared to their traditional source
equivalents, their power supplies exhibit a trait known as ‘in-rush’ when they are first
powered on. This is caused by the various components within the switched mode
power supplies initially topping themselves up with power. The in-rush period lasts only
milliseconds and does not cause any effect when a handful of units are powered on at the
exact same time. However, if many fixtures are linked to the same power input, they will
momentarily pull a current that may greatly exceed their normal operating level. This may
affect over-current trips when power is applied and should be anticipated when planning
the power panel size requirements. The in-rush current values for the Dyna Graze HO
Exterior DMX fixtures are as follows:
•
Dyna Graze HO Exterior DMX 1’: 30A max @ full load
•
Dyna Graze HO Exterior DMX 4’: 40A max @ full load
Maximum number of fixtures
The maximum number of fixtures that can be connected (using Acclaim Lighting cable sets)
in a single series run is dependant on the supply voltage, as follows:
240/277VAC supply
: 100 feet (30m) of total fixture length
120VAC supply
: 50 feet (15m) of total fixture length
Runs can consist of mixtures of 1’ and 4’ fixtures, as required, providing the total length of
fixtures (and the total length of fixtures plus cable lengths) is not exceeded. See also the
advice on in-rush currents given below.
In damp or wet location installations, ensure that the output connector of the final fixture
has an end cap fitted [DGHEC] to prevent moisture ingress.
240/277VAC supply
: 500 feet (152m) of total fixture
plus
cable length
120VAC supply
: 250 feet (76m) of total fixture
plus
cable length