START PAC Voltage Reduction Unit

Available in 2 configurations.

VRU 600 and VRU 1200

Most aircraft (both fixed wing and helicopters) have over voltage protection relays specifically for protecting their aircraft systems from being damaged by high voltages from GPUs. Unfortunately, there is no industry standard for the setting of these relays. However, most are 30 to 31 volts. Some GPUs can range from 28 to 30 volts depending on the brand and their age. A 28 volt battery pack, such as the START PAC 6028QC, will actually read 30.5 volts when fully charged. One example of an aircraft where the voltage protection relay is set at an unusually low value, is the Eclipse 500 at 29 volts. At many airport facilities, the GPUs exceed this value.

The VRU 600 and VRU 1200 START PAC voltage reduction units, therefore, have been developed so that when connected between the GPU and the aircraft, the voltage is lowered by 0.6V or 1.2V respectively. In many cases, this slight voltage drop will allow the aircraft to accept the GPU.

All START PAC™ products come with a 1-year warranty on workmanship and materials.*

Please handle this unit in a responsible manner. START PAC™ is not responsible for damages caused by misuse or neglect.


Need Assistance?

START PAC offers a wide selection of power suppliesstarting units and combination Aircraft Ground Power Units (GPU). Browse our website to read about our extensive product line or visit our tutorial section to gain a more technical insight into our products. If you have a question or need help finding the right product for your aircraft, locomotive or vehicle, START PAC provides customer service support via phone and email. One of our friendly and knowledgeable experts will guide you to the product suited to your specific needs. If – for whatever reason – you are unhappy with your START PAC product, simply send return the unit to us for a full refund.

Why buy from START PAC®?

Made in the USA and developed with the latest state-of-the-art battery and power management technology, our products are trusted the world over. START PAC power supplies are built for heavy duty application and are designed to withstand all environments, however tough. START PAC boasts superior technical and after sales support thanks to our long standing industry experience and our passion for the industries in which we work. START PAC offers unparalleled value for money and fast global shipping via our international dealership network.

*Batteries are cycle-dependent and are therefore not covered under this warranty.