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fastbulbs.com is the commercial resource for light bulbs, ballasts and exit signs from quality manufacturers including Philips Lighting, Advance Transformer and
Simkar. We stock replacement lighting and lamps including incandescent bulbs, halogen bulbs, halogen light bulbs, par halogen bulbs, par halogen lamps, mr16
bulbs, mr11 bulbs, mr16 lamps, mr11 lamps, halogen lamps, fluorescent bulbs, fluorescent light bulbs, fluorescent lamps, fluorescent tubes, compact fluorescent
bulbs, linear fluorescent bulbs, metal halide bulbs, high intensity discharge bulbs (H.I.D.), full spectrum light bulbs, ANSI code bulbs, ANSI bulbs, projector bulbs,
projection bulbs, medical bulbs, dental bulbs, surgical bulbs, signal bulbs, light bulbs for edwards signal products, automotive bulbs, auto bulbs. We offer a lighting
cross reference for GE light bulbs, GE bulbs, Osram Sylvania light bulbs, Osram Sylvania bulbs, Philips light bulbs and Philips bulbs. fastbulbs.com carries light
fixtures including exit signs, led exit signs, dual voltage exit signs, exit sign replacement bulbs, and emergency lighting, as well as both magnetic ballasts and
electronic ballasts from Advance ballast. Fluorescent lamp recycling and ballast recycling services are available for disposal of lamps and ballasts that contain
mercury.

What is a magnetic core & coil low voltage transformer?
A low voltage transformer is an electrical device that reduces 120 volts (line voltage) into 12 volts or 24 volts (low
voltage). It is sometimes made by winding two wires around an iron core with one wire connected to the primary side
(line voltage side) and the second wire connected to the secondary side (low voltage side). In the case of low
voltage halogen or low voltage xenon lighting the low voltage transformer has an input or primary voltage of 120
volts (sometimes 277 volts) and an output or secondary voltage of 12 volts or 24 volts.

What is an electronic low voltage transformer?
Conventional low voltage transformers, also called magnetic core & coil low voltage transformers can be extremely
large and heavy, consist of an iron core and two sets of wires as described in the previous paragraph. An electronic
low voltage transformer, on the other hand, also contains an electronic device, called an inverter, which allows the
size of the low voltage transformer to be substantially smaller. An inverter and a small transformer make up the main
components of what we normally call an electronic low voltage transformer. An example of our electronic
transformers is Hatch's RS and VS lines.

How does an electronic low voltage transformer work?
The inverter conditions the voltage to change direction at a frequency of about 20,000 times per second (called
Hertz or Hz) as opposed to the “normal” power from your wall outlet, which changes direction at a frequency of 50Hz
or 60Hz. The higher the frequency, the smaller the low voltage transformer can be. Most electronic low voltage
transformers provide high frequency AC output.

What is the advantage of an electronic low voltage transformer?
Electronic low voltage transformers are very small and light compared to magnetic low voltage transformers, in most
cases small enough that fixture manufacturers can often incorporate them within their lighting fixture rather than
leaving the customer to find a hiding place. Even when not incorporated within the lighting fixture an electronic low
voltage transformer is very easy to install in a small hidden location.

What is the advantage of a magnetic core & coil transformer?
Simply - temperature rating. When size and weight are not an issue and a high temperature is needed, a magnetic
transformer is a good choice. Hatch magnetic low voltage transformers can handle normal operating temperatures of
180 degree celcius.

What is the correct way to wire up a Hatch transformer?
Please make certain that the black and white input wires (primary side) of the low voltage transformer are connected
to the power line (120 volts or 277 volts) using wire nuts that the two red output wires (secondary side) of the low
voltage transformer are connected to the low-voltage light source using wire “terminal blocks” of appropriate size (for
solid contact). Low voltage halogen or low voltage xenon lighting systems carry relatively large currents so all of the
low voltage connections must be very tight to prevent arcing (a possible fire hazard) within those connections. Note:
Do not connect 277 volts to a 120 volt transformer, and also do not connect 120 volts to a 277 volt transformer.
Make sure you have the correct transformer that matches your input voltage.

What should I check if the transformer does not seem to be working?
(A) Please make certain that the black and white input wires (primary side) of the low voltage transformer are
connected to the power line (120 volts or 277 volts) and that the two red output wires (secondary side) of the low
voltage transformer are connected to the low voltage light source (12 volts or 24 volts). Most failures occur as a
result of reverse or improper wiring.
(B) Check the filament of the lamp to see if is burned out. (Remember the glass envelope of a halogen lamp should
NOT be touched by bare hands because the natural oil from your hands will cause the lamp to burn out prematurely.)
(C) Check the connection somewhere between the output wires of the transformer (red wires) and the lamp. The
transformer has a sophisticated short circuit/overload protection system. If it senses a short or a bad connection or
too many lamps (ie: too much wattage) it wil cause problems. Check all the connections for tightness, corrosion,
arcing etc. If all are tight and clean and you do not have more than the maximum wattage of lamps on the system,
then look at the lampholder itself. Make sure the contacts in the lampholder where the lamps plug in are still tight
and do not show signs of carbon buildup or arcing.

Can electronic transformers be remote mounted?
Yes, they can be remote mounted up to 10 feet, after 10 feet there is a voltage drop of approximately .07 volts per
foot.

Why does my voltmeter read "0" when testing your transformer, does this mean the unit is bad?
No, some Hatch electronic transformers feature "Demand Circuit Design". The transformer will not produce voltage
unless a lamp with at least the minimum wattage required is connected to it.

Will your transformer or ballast operate at 50Hz or 60Hz?
Yes.

Why is there a delay when I turn a lamp on using transformers?
Many models of low-voltage electronic transformers utilize a soft start circuitry to maximize lamp life. The soft start
circuit ramps up the lamp filament voltage slowly when the lamp is cold.

Why do I measure very low voltage on the lamp even though the light output looks OK? Shouldn't it be
about 11.5V?
You must use a digital volt meter capable of reading 25KHz or higher waveforms, we suggest a Fluke Model 5220A
or equivalent.

What is the "blue" loop on your RS12-60WD and RS12-75WD transformers for?
This wire is only for OEM type applications. It is used to attach a 1 meg ohm linear taper potentiometer for dimming
via a potentiometer. You do not have to use the blue loop to make the unit work, it is only there if you want to use a
potentiometer to dim your fixture (example: Desk top lamp).