HOTSTART Introduces 690V Heaters for Diesel Electric Propulsion Applications

SPOKANE, WA - The surge in popularity of marine Diesel Electric Propulsion (DEP) systems based on low voltage 690VAC has generated a need for electrical equipment that can run on the main generated voltage. In response to engine dealers and marine operators, Hotstart® Mfg. has developed a range of engine coolant heaters that can operate on 690V (50 or 60Hz) without the need for transforming the voltage down to the more common 440/480V.

In a DEP system, where a large main propulsion engine is replaced by many smaller engines driving electrical generators, the electrical coolant pre-heaters are becoming an important part of the DEP system as each engine must be kept warm and ready to start when in standby mode. Being able to use the main generated voltage at 690V eliminates the need for transformers, reduces transmission losses and allows for smaller cable sizes due to the lower amperage.

"We're getting heavily involved in the marine diesel electric drive business as it continues to gain popularity across a number of applications," explained Trond Liaboe, International market manager for Hotstart®.

He said that early adopters included companies operating offshore supply vessels serving the North Sea oil and gas infrastructure. "Our customers depend on each engine being ready to go to full power when needed. The engine pre-heaters we offer ensures the overall readiness and reliability of the DEP system even in the challenging conditions found in the North Sea," Liaboe said. The new DEP systems have also been ordered for use on two new jack up oilrigs currently being constructed in Asia.

HOTSTART's new heaters require only the connection of 3ph 690VAC prime power. An additional 24VDC engine start/stop signal permits automatic operation of the heater. The power range of the heaters is 3kW to 12kW. Another range of heaters from 24-108kW is set to be released towards the end of the year.

About HOTSTART

Hotstart® Manufacturing Company (www.kimhotstart.com) is a leading developer and manufacturer of diesel engine block heaters. The company was established in 1942 with the original patent for engine coolant heating. Today, the Hotstart® product line includes coolant heaters, oil heaters, air heaters, battery pads and wraps, controls, harnesses and complete systems. These products are used on diesel engines to provide easy starts, immediate full power, reduced engine wear, reduced emissions and reduced fuel consumption. Applications include standby generator sets, locomotives, equipment/machinery, gas pipeline compressors, heavy duty trucks and marine. Hotstart® is headquartered in Spokane, Washington and is certified to ISO 9001-2000.