What is a negative 48Vdc system?

SmartSys Telecom Rectifier

In telecommunication systems it is common to have a supply voltage of -48Vdc. What this means is that the positive terminal is grounded. But why 48V and why ground the positive end? Surely it would be more intuitive to ground the negative end? I’ll answer these questions in turn. Why 48Vdc? This is a trade […]

Pharmacy Fridge UPS Applications

Pharmacy Fridge

Why use a UPS on a Pharmacy Fridge? Unlike applications where sudden power loss causes data loss or other operational issues, power loss to a pharmacy fridge is not such of an issue since the internal temperature is well controlled. In the event of a power cut a solution is simply not to open the […]

Our New Website

Our new website

We’ve made some changes to our website. This is to more reflect the type of business that Power Inspired has evolved into, whilst maintaining the link to what got us here in the first place. We were the first company to open an online store exclusively for power protection products. Previously, you would have had […]

Lead Acid Batteries

Ampere Hour

Lead Acid Batteries are the ubiquitous form of energy storage for Uninterruptible Power Supplies due to the high power density that can be achieved, simple charge characteristics and non-spillable operation. In pluggable UPS systems the lead acid batteries are always maintenance free and sealed, e.g. they do not require topping up with distilled water. They […]