Hammond Mfg. - FAQ Section (Frequently Asked Questions)

FAQ

Frequently Asked Questions

How do I order or download a catalog?
We have set up direct e-mail links to our various catalog departments. Simply pick the catalog you need, click the link and fill in your shipping address.

How do I order?
We have teamed up with the best stocking distributors to serve you quickly and efficiently.

Do you sell direct?
We sell mainly through our stocking distributors. Modified product and high volume OEM orders only are handled directly - contact us for more information.

I can not find the part I want on the distributor's web site - how do I order?
We have over 8,000 standard part numbers, the large national distributors do list out entire database. Due to the broad size of our offering they can not stock them all. For those items, our distributors can special order and we will be glad to drop ship from our stock, to you. Contact their local offices or central 800# by phone.

Do you manufacture custom enclosures?
Sorry, no we do not. We do light modification work (ie...holes and cutouts) to standard enclosures. Please link to our catalog page covering this subject (in Adobe reader PDF format).

Do you manufacture custom transformers?
Yes, please link to our catalog page covering this (in Adobe Reader PDF format).

In the transformer section, what does C.T. mean?
C.T. is short for center tapped. The center of the winding has been brought out of the transformer via a wire lead or termination.

In transformers with dual primaries and secondaries, do I need to hook up both?
YES, even though one primary (or secondary) winding may be all you need from the look of the schematic and/or specs, the unit was designed to run ALL windings. Example - you have a dual primary unit for 115/230VAC operation. You have 115VAC power, you must hook BOTH primaries in parallel (make sure you connect them in phase).
If you try to use only one primary (or secondary), the unit will probably overheat and voltage regulation will be poor.
Link here to our hook up explanations.

In dual winding transformers, how do you hook windings up "in phase"?
In the schematic and on the units we mark them with a small dot. The best non-technical way to explain this is the dot is similar to the + on a battery. To hook the windings in parallel, always hook the dot to the dot. To hook the windings in series, hook the dot to no dot.
Link here to our hook up explanations.