Frequency conversion to allow the electrical testing of products that are to be shipped worldwide

Using motor-generator sets to convert frequency to create a power source to test products that are to be shipped internationally.

When a manufacturer wishes to ship an electrical product internationally, they must be cognizant of the power source in the destination country as it can be different from the source of power used in the country where the product is manufactured. Along with voltage differences, countries operate their power sources on different frequencies. The two frequencies used worldwide are 60 Hz and 50 Hz. The North American countries, Saudi Arabia and portions of Japan utilize 60 Hz power, whereas Europe, Asia and most of the rest of the world operate on 50 Hz power. The frequency differences between countries require global manufacturers to design their products to operate on 60 Hz and 50 Hz power sources.

The challenge for manufacturers is that in order to properly test their products prior to shipment overseas, they require a power source in their manufacturing plant that replicates the power source that will be found in the final destination country. A common method used to convert frequency from the local power source to the required international power source is a motor-generator set.

Horlick motor-generator sets have successfully provided a clean source of power conversion for companies worldwide. They are used by manufacturers in the United States who need to convert power from 60 Hz to 50 Hz and they are similarly used by overseas manufacturers who need to do just the opposite and convert frequency from 50 Hz to 60 Hz.

Horlick has recently shipped a Model 60SC-301, frequency converting, motor-generator to a Thailand division of a, more than 100 year old, global manufacturing company that makes coffee grinders, beverage equipment and food processing equipment. The Thailand plant manufactures coffee grinders that are sold in the United States and need to be tested at 60 Hz prior to shipment.

Horlick 60SC Model motor-generator sets utilizes a 4-pole, 1500 RPM, induction motor to drive a 4-pole, 1800 RPM, synchronous generator through a V-belt drive system. Given a 50 Hz input, the motor-generator set will produce a clean source of 60 Hz power, isolated from switching transients, voltage fluctuations and power line noise. The motor-generator sets are equipped with a standard control panel that contains a motor-starter, voltage regulator, output circuit breaker, start-stop push-buttons, pilot lights and a meter package.

The Model 60SC-301 used in this project had an output rating of 37.5 KVA, single-phase. The 60SC series of Horlick motor-generator sets can be configured for a single-phase or three-phase output and they are manufactured in capacities that range from 6.25 to 313 KVA. For higher power capacity applications, Horlick offers the 60RG line of motor-generator sets that can be built for capacities up to 1250 KVA.

Horlick has previously shipped motor-generator sets to USA based facilities of the same corporation that owns the Thailand plant. This shipment to Thailand represents the fourth motor-generator that this company has purchased and the first that they have located in an overseas manufacturing facility. Horlick works with many multi-national corporations similar to this one who have multiple manufacturing sites worldwide where a frequency converter is required for product testing. Regardless of whether product is being tested overseas for sale in the USA, or tested in the USA for shipments overseas, the Horlick Company offers motor-generator sets that convert frequency to create the test power that is required.

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