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ScreenLight & Grip, Boston, MA offers Lighting Rental, Production Services, & Innovative Power Solutions


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Paralleled Honda EU7000s powering a 9kw ARRIMAX M90

Located in the Boston area, ScreenLight & Grip offers grip truck rentals, production services, and innovative power solutions using the Honda inverter generators. Our HD Plug & Play Gen-sets incorporate proprietary distribution equipment we have developed that enable the Honda EU6500 and EU7000 generators to power HMI lights up to 12kw or Quartz lights up to 10kw. The primary factors limiting the use of HMIs on portable Honda generators has been their inefficient use of power and the harmonic currents they introduce into the power stream. The power waveform below right is typical of what results from the operation of a couple of 1200W HMIs on a conventional portable generator. The adverse effects of the harmonic noise exhibited here, can take the form of overheating and failing equipment, efficiency losses, circuit breaker trips, excessive current on the neutral wire, and instability of the generator’s voltage and frequency. For these reasons it has never been possible to operate more than a couple of 1200W HMIs on a conventional 6500W portable gas generator and it has not been possible to combine their output in parallel operation.

 

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Right: Distorted power waveform created by Non-PFC 1200W HMI ballasts on conventional generator.
Left: Near perfect power waveform created by the same lights with PFC ballasts on inverter generator.

 

In contrast our HD P&P Gen-sets create clean stable set power that is capable of operating larger lights (HMIs up to 12kw or Quartz lights up to 10kw), or more smaller lights, off of portable gas generators than has ever been possible before. For example, the power waveform above on the left, is the same package of HMI lights but with power factor corrected electronic HMI ballasts operating on our modified 7500W Honda EU6500is Inverter Generator. As you can see, the difference between the resulting waveforms is startling. Even though we are running the same overall load, the fact that the HMI ballasts are power factor corrected and the power is being generated by our modified Honda EU6500is Inverter Generator, results in virtually no power waveform distortion. For this reason, the generator can support larger loads and two Honda EU6500s, or EU7000s, can for the first time, be combined in parallel operation for greater output.

 

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Our modified 7500W Honda EU6500is with our 60A Transformer/Distro can power
a 4kw HMI along with a 1.2kw HMI, 400w Lighthouse HMI, a couple of Kino Flo ParaBeam 400s,
ParaBeam 200s, and Tegra 400s of our HD P&P Pkg.

 

For example, either our modified 7500W Honda EU6500 or EU7000 Generator operating alone with our 60A Full Power Transformer/Distro is capable of powering a 4kw HMI along with a 1.2kw HMI, plus a couple of Kino Flo Parabeam 400s, Parabeam 200s, and Tegra 400s. Add a second one of our modified 7500W EU Generators and our Paralleling Control Box and the combined 120A output is capable of powering HMIs up to 12kw or more smaller lights than has ever been possible before on portable gas generators. Given the light sensitivity of HD Camcorders, our HD Plug & Play Gen-sets are capable of powering a complete location lighting package for HD Digital Cinema productions at a tremendous cost savings.


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Our Shock Stop GFCI with either our 60, 84, or 100A Transformer/Distro is
the only way to bring Honda EU6500s or EU7000s
into OSHA compliance for use on work sites.

By eliminating the need for a tow generator in order to have feature style production capability, our HD P&P Gen-sets eliminate the expense of not only a tow generator, but also the added expense of a rental house grip truck and truck driver. And when used with a GFCI Shock Block, our Full Power Transformer/Distros bring the Honda EU6500 and EU7000 generators into full OSHA compliance (like most silent portable gas generators, they do not meet OSHA requirements for use on work sites otherwise.) Use this link for a detailed explanation of OSHA requirements and why almost all portable generators do not meet them.

 

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Left: Transformer/Distro plugged into a 30A/240V dryer outlet.
Right: 4K HMI Par under rain protection powered by Transformer/Distro

 

The Full Power Transformer/Distros of our HD Plug & Play Gen-sets will also enable you to access more power on location from common 240v household outlets as well (use this link for details.) Adapters are available for common 240V sources found on interior locations - including Range Plugs, Dryer Plugs, and special receptacles installed for Window Air Conditioners. By giving you access to more "house power" through common 240V household outlets, our Full Power Transformer/Distros also eliminate the need for dangerous tie-ins.

 

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Left: Arri AS18 1800W Par powered from Transformer/Distro. Right: 4Kw
and 1800W HMI ballasts powered from Transformer/Distro.

 

While our HD P&P Pkg. is very new (introduced Jan 09), the power generation issues it addresses have been vexing set electricians for years. Use this link for an informative news-letter article that explains the electrical engineering principles behind these issues and how our HD P&P Pkg. resolves them. This article is cited in the 4th Edition of Harry Box's "Set Lighting Technician's Handbook" and featured on the companion website "Box Book Extras." Of the article he states:

"Great work!... this is the kind of thing I think very few technician's ever get to see,
and as a result many people have absolutely no idea why things stop working."

"Following the prescriptions contained in this article enables the operation of bigger lights, or more smaller lights, on portable generators than has ever been possible before."

 

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