Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Hey everyone, I'm Echo, a 10-year veteran in the power system industry. Today we’re going to talk about an important topic — the future development trends of current transformers (CTs) used in Air Insulated Switchgear (AIS).As technology advances and market demands evolve, these critical components are also undergoing continuous innovation. In this article, I’ll walk you through the key directions of future development based on my hands-on experience and industry ob

Hey everyone, I’m Echo, a 10-year veteran in the field of outdoor voltage transformers (VTs). Today, let’s talk about where the 35kV outdoor voltage transformer is heading in the future.1. Digitalization and Smart FeaturesWith the rise of IoT (Internet of Things), big data, and cloud computing, 35kV outdoor VTs are getting smarter.Imagine a voltage transformer that can monitor its own condition in real time, send data remotely, and even be controlled from your phone or comput

Hey everyone, I’m Echo, and I’ve been working with voltage transformers (VTs) for 12 years.From tagging along with my mentor doing insulation tests to now leading teams handling all kinds of high-voltage equipment issues — I’ve done a lot of oil refilling in my time. Especially when it comes to 110 kV voltage transformers, oil refill is a key part of daily maintenance. But let’s be honest — it's also one of the biggest time-wasters.A fe

Hey everyone, I’m Echo, and I’ve been working with voltage transformers (VTs) for 12 years.From learning how to wire and do error tests under my mentor’s watchful eye, to now participating in all kinds of smart substation projects — I’ve seen the power industry evolve from traditional systems to fully digital ones. Especially in recent years, more and more 220 kV GIS systems are adopting electronic voltage transformers (EVTs), slowly replacing th

I'm Echo, a 12-Year Veteran in the CT Industry, Talking About What's Coming NextHi everyone, I'm Echo, and I've been working in the current transformer (CT) industry for 12 years.From learning wiring and equipment debugging with my mentor to now leading a team tackling complex on-site issues, I've witnessed many technological advancements and industry changes. Especially with outdoor current transformers, there have been significant developments, but also much room for improvement.A few days ago

As a front - line power operation and maintenance worker, I deal with current transformers (CTs) daily. Having witnessed the popularization of new photoelectric CTs and tackled numerous faults, I’ve gained practical insights into their application and testing improvements. Below, I’ll share my on - site experience with new CTs in power systems, aiming for a balance between professionalism and practicality.1. Application of New CTs in Power Systems1.1 CTs in Power SystemsMost

By Echo, 12 Years in the Electrical IndustryHi everyone, I'm Echo, and I've been working in the electrical industry for 12 years.From early involvement in commissioning and maintenance of distribution rooms to later participation in electrical system design and equipment selection for large-scale projects, I’ve witnessed how voltage transformers have evolved — from traditional analog devices to intelligent, digital components.The other day, a new colleague from a power compan

By Echo, 12 Years in the Electrical IndustryHi everyone, I'm Echo, and I've been working in the electrical industry for 12 years.From my early days doing commissioning and maintenance in distribution rooms, to later participating in electrical system design and equipment selection for large-scale projects, I’ve witnessed how dry-type transformers have evolved from traditional tools into smarter, greener devices.Recently, a new colleague asked me: “What’s the current

As a frontline worker in power distribution operation and maintenance, I deal with load switches daily—they’re the “gatekeepers” of medium - voltage distribution systems, ensuring stable power supply for users. With rapid economic development, the demand for power system safety and reliability keeps rising. Medium - voltage distribution systems are crucial for grid stability, and load switches (as key line - mounted equipment) play a pivotal role. Their ma

As a front - line technician in loop - network power supply and prefabricated substation operation and maintenance, I deeply understand equipment iteration driven by high - voltage urban expansion. Per theNational Power Supply and Consumption Regulations, for equipment over 250kW or 160kVA transmission capacity, 10(6)kV high - voltage power supply and 220/380V step - down form a necessary pattern, making loop - network units and prefabricated substations key in distribution networks.I. Equipment