Emparro67 gives you power where you need it most

Murrelektronik's Emparro67 power supply unit (PSU) has been designed with decentralisation in mind. These IP67 rated power supplies, from the esteemed Emparro range, enable you to move the power supply into the field while still supplying direct current drives, as PIF explains here in our latest article.

Switching types of power supply unit

In practice, a Murrelektronik customer designed a supply network for direct current drives of a feeding system. It was a comprehensive system with a central cabinet that did not use terminal boxes. The electrical engineers preferred a design with a decentralised power supply to save cabinet space, as they were familiar with a competitor’s IP67 power supply. However, this unit couldn’t handle the high inrush currents of the direct current drives.

By switching types of power supply unit, to Murrelektronik's Emparro67 they were able to make their design concept a reality. It is IP67 rated and can be installed close to the DC drives. Because the compact and rugged metal housing is fully potted, the components are protected from mechanical stress, as well as damage from dirt, humidity and cooling lubricants.

The connections of the power supply unit are all on one side of the unit, which could be easily installed directly under the machine. Voltage conversion (from 230V AC to 24V DC) now happens close to the load, keeping power loss low thereby lowering energy costs especially as compared to the centralized supply design.

Emparro67 also supplies the current required to start the high inductive loads of the DC drives. It’s power boost function (supplying a nominal current of 150 percent for up to four seconds) without the risk of voltage drops is a key factor. While it’s integrated current limiting fuse provides additional protection. During standard operation, Emparro67 supplies a constant current of approximately 9A.

Emparro67 reduces power loss and energy costs

Manuel Senk, Murrelektronik product manager, is pleased with the success of this project. He says, "Our goal is a decentralized power supply, away from the central cabinet. Emparro67 is a key tool to help our customers to reach this goal. They can use smaller cabinets and the power supply is always next to the load where it is required."

Murrelektronik Emparro67 power supply units are designed for applications in the field. They are durable enough to withstand even the most extreme environmental conditions. Emparro67 significantly reduces power loss and lowers energy costs because they can be installed directly next to the load where the conversion from 230 V AC to 24 V DC takes place. Emparro67 has UL-approval (UL-508-listed) which makes it an option for companies that export machines or system to North America.

Features and benefits:

• Low power loss
• High efficiency of up to 94.2%
• Active PFC
• Ambient temperature up to 85 °C
• Extremely rugged, fully potted IP67 housing
• Contact-safe installation even under full load
• Flat, compact design

For more information, please visit www.murrelektronik.uk. To speak to a Murrelektronik adviser today, call +44 (0)161 72831-33 or email [email protected].