Electrical Engineering Guides

GIS CT

Selection of Primary Verification Circuit and Parameter Measurement for UHV GIS Current Transformers

In UHV GIS, current transformers are key to electric energy metering. Their accuracy determines power trade settlements, so on - site error verification per JJG1021 - 2007 is needed. On - site, use power supplies, voltage regulators, and current boosters. Due to encapsulation in GIS, build test circ

By Oliver Watts 07/07, 2025
GIS CT

What are the polarity test methods for GIS current transformers?

I rsquo;m Oliver, an 8 - year current transformer testing pro. Today, let rsquo;s break down new and old polarity test methods for GIS current transformers mdash;how they work and their pros/cons. 1.Testing Methods 1.1New Method Pre - test ops: Open FDS21/FDS22 fast disconnectors + DS23 disconnector

By Oliver Watts 07/07, 2025
CT

Ratio Trial Verification Method for Current Transformers

Fellow electric power calibration workers, you must have encountered this situation: The nameplate of an outdoor current transformer has been tormented by wind, sun, rain, and freezing, to the point where the transformation ratio is indistinguishable! Don't panic, we have a solution - use a current

By Oliver Watts 07/05, 2025
CT

What tests need to be conducted on current transformers?

By Oliver, 8 Years in the Electrical Industry Hi everyone, I'm Oliver, and I've been working in the electrical industry for 8 years. From early days doing substation equipment commissioning to now managing protection and metering configurations for entire distribution systems, one of the most freque

By Oliver Watts 07/04, 2025
CT

Testing of Optical Current Transformers (OCT)

With the development of modern economy and science and technology, photoelectric current transformers (PECTs) have fully transitioned from the trial operation stage to practical application. As a front - line testing personnel, I deeply feel their importance in the power system during daily work. I

By Oliver Watts 07/03, 2025
VT

What tests need to be done on voltage transformers?

Practical Experience Sharing from an Electrical Engineer in the Field By Oliver, 8 Years in the Electrical Industry Hi everyone, I'm Oliver, and I've been working in the electrical industry for 8 years. From early involvement in substation commissioning and equipment inspection, to now managing the

By Oliver Watts 07/03, 2025
Dry type transformer

What tests are required for dry-type transformers?

1 Pre - commissioning Inspection As a front - line tester, before formally commissioning a dry - type transformer, I need to carry out a comprehensive and systematic inspection. First, I conduct a visual inspection of the transformer body and its accessories, carefully checking for mechanical damage

By Oliver Watts 07/01, 2025
Load switch

A Novel Detection Method for Stuck Faults in Load Switches

In recent years, as distribution automation advances, load switches see wider use in distribution lines. Yet, mechanical - failure - induced accidents are on the rise, burdening line operation and maintenance. Poor mechanical performance is the main cause of switch faults. Many scholars study large

By Oliver Watts 06/30, 2025
Load switch

What tests need to be conducted for load switches?

As a technician with years of on-site experience in power testing, I understand the importance and complexity of load switch testing. Below, I combine practical work experience to elaborate on the full process of load switch testing, from testing items and methods to equipment and procedural specifi

By Oliver Watts 06/28, 2025
Solar Transformer

What does the testing of photovoltaic transformers involve?

1. Specificities and Testing Requirements of Photovoltaic Transformers As a new energy systems technician, I recognize photovoltaic transformers' unique design and application traits: Inverter - output AC carries abundant 5th/7th - order odd harmonics, with PCC harmonic current distortion reaching 1

By Oliver Watts 06/27, 2025
EV Charger

Field Testing Procedures for Electric Vehicle Charging Piles

As a technician deeply involved in charging pile testing on the frontline, my daily work makes one thing crystal clear: as people rsquo;s living standards rise, the demand for vehicles surges. Coupled with the growing popularity of environmental protection concepts, the electric vehicle (EV) industr

By Oliver Watts 06/24, 2025
EV Charger

Electric Vehicle Charging Pile Testing Technologies and Failure Analysis

1. Detection Technology for Electric Vehicle Charging Piles EV charging piles are primarily divided into two categories: DC charging piles and AC charging piles. Let's start with DC charging piles: they communicate with the EV's battery management system (BMS) and directly charge the power battery t

By Oliver Watts 06/23, 2025

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

All

Selection of Primary Verification Circuit and Parameter Measurement for UHV GIS Current Transformers

What are the polarity test methods for GIS current transformers?

Ratio Trial Verification Method for Current Transformers

What tests need to be conducted on current transformers?

Testing of Optical Current Transformers (OCT)

What tests need to be done on voltage transformers?

What tests are required for dry-type transformers?

A Novel Detection Method for Stuck Faults in Load Switches

What tests need to be conducted for load switches?

What does the testing of photovoltaic transformers involve?

Field Testing Procedures for Electric Vehicle Charging Piles

Electric Vehicle Charging Pile Testing Technologies and Failure Analysis

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