Technical Bulletin – January 2019

The Case of the Missing Energy An Overview of AC/DC Conversion Losses Introduction What constitutes an ideal system? This is vague question that is sure to yield a multitude of different responses depending on who you ask. If you ask a power electronics engineer, they will probably tell you that an ideal system is one […]

Technical Bulletin – December 2018

Safety Approvals: The PSE Mark Introduction Japan is widely considered to have the third largest economy in the world. It is no surprise that Japan is an appealing market for the sale of all sorts of goods, including electronics. However, to sell a product into the Japanese market manufacturers must first obtain all of the […]

Technical Bulletin – November 2018

Going the Distance: DC Cable Length Consideration Introduction Here at Power Partners, a significant majority of our business is in developing modified-standard AC/DC converters, tailoring one of our off-the-shelf solutions to meet the more particular needs of a specific application. The modifications we have developed over the years span a wide range of technical challenges, […]

Technical Bulletin – September 2018 (2)

Safety Approvals: Limited Power Sources and Types of Limiting Introduction Most industrial AC/DC power supply labels are littered with a wide assortment of agency approval marks. In examining the approval marks on lower-power adaptors, one may occasionally come across the three letter acronym: LPS. We receive inquiries almost weekly regarding the LPS compliance of our […]

PDAM120 Series

Compact 120 Watt AC-DC Medical & ITE Power Supply

Compact 2×3, 120 Watt AC-DC Medical & ITE Power Supply Class I or Class II Versions Editorial Contact: Judi Zullo, Download Press Release (PDF) Hudson, MA – Power Partners, Inc. is pleased to announce their PDAM120 Series of 120W ac/dc power supplies that feature either Class I or Class II input configurations and are […]

Technical Bulletin – September 2018

Quality Management Systems ISO9001:2015 Introduction Both Power Partners Inc and Protek Power North America are now ISO9001:2015 registered companies! Developing and implementing an ISO9001 recognized quality management system is an increasingly valuable stride toward fostering sustainable business development initiatives. The fourth edition of the ISO9001 standard, which was published in 2008, will no longer be […]

Technical Bulletin - March 2017

Technical Bulletin – June 2018

Load Sharing Considerations: Why Two is Not Always Better Than One Introduction From time to time, we get asked about the current sharing capabilities of our power supplies, and whether or not they can feed a load in parallel. This usually comes up when discussing modular system applications where the desire is for independent supplies […]

Technical Bulletin - March 2017

Technical Bulletin – March 2017

Means of Protection IEC 60601-1 3rd edition uses Means of Protection (MOP) to classify the electrical safety requirements of medical electrical (referred to as ME) equipment. There are two classifications: Means Of Operator Protection (MOOP) and Means Of Patient Protection (MOPP). Devices that make patient contact require two means of patient protection (2 x MOPP) […]

White Paper-Tough Terminology

Tough Terminology: Why Working Voltage Matters in Safety Approvals By Dylan Howes. Organizations that test power circuits for safety have specific definitions of working voltage and other parameters that bear heavily on how products get safety certifications permitting their sale. Safety approval agencies have been evaluating both industrial and consumer products for well over a century. The need […]

Technical Bulletin – March 2018

EMC Implications of Using a Class II Power Supply in a Class I Application Introduction The majority of power supplies used in commercial or industrial applications today fall into one of two construction categories, Class I or Class II (not to be confused with Class 1 and Class 2). These classes are associated with safety, […]