Electrical Engineering Guides

GIS PT

What Are the Steps for Error Testing GIS Voltage Transformers?

Hey everyone, I'm Oliver, and I've been working with current transformers (CTs) and voltage transformers (VTs) for 8 years. From assisting my mentor on site to leading high-voltage testing teams and conducting error calibrations independently, I rsquo;ve dealt with all kinds of instrument transforme

By Oliver Watts 07/08, 2025
GIS PT

An GIS Equipment Explosion Accident Caused by PT Secondary Wiring Errors

1. Accident Overview A newly - built 110kV substation rsquo;s GIS exploded during commissioning due to a PT secondary circuit short - circuit. Though the cause was simple, consequences were severe, warranting reflection. 2. Accident Process On the power - transmission day: The upper - level power su

By Felix Spark 07/08, 2025
GIS VT/ PT

Operation Method for PT Resonance in 500kV GIS Switching Station

1. Causes of Resonance A 500kV GIS switching station is designed following the principle of ldquo;primary equipment intelligence and secondary equipment networking rdquo;. The PT high - voltage side has no disconnector and is directly connected to the bus GIS. Through the analysis of fault recording

By James 07/08, 2025
GIS CT

What to Pay Attention to When Selecting and Installing GIS Current Transformers?

Hi everyone, I'm James, and I've been working with current transformers (CTs) for 10 years. Today, I rsquo;ll talk about what you need to watch out for when selecting and installing GIS current transformers. Part 1: Key Considerations During Selection 1. Accuracy Class Protection-grade CTs: Used for

By James 07/07, 2025
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
GIS CT

Exploring the Design and Application of Photoelectric Current Transformers in GIS

1.Design and Application Example of Photoelectric Current Transformer in GIS This article takes a 126kV GIS project as a specific example to deeply explore the design ideas and practical application of photoelectric current transformers in the GIS system. Since this GIS project was officially put in

By Dyson 07/07, 2025
GIS CT

Maintenance and Diagnostic Analysis of Current Transformers in GIS Equipment

I'm Oliver, with 8 years of experience in current transformer testing. These are all practical experiences, shared with you 1 Maintenance of Current Transformers Having been in the business of current transformer testing for 8 years, I know a thing or two about their maintenance! The maintenance of

By Oliver Watts 07/07, 2025
GIS CT

What are the possible causes of cracking failure in CT terminal blocks within GIS equipment?

Gas - insulated switchgear (GIS) , often called ldquo; SF 6 combined electrical apparatus rdquo;, is widely used in power systems for its high reliability, small footprint, low noise, and low loss. It encloses high - voltage devices like circuit breakers, fast grounding switches, current transformer

By Felix Spark 07/07, 2025
Outdoor CT

Development of an Outdoor Integrated Low - Voltage Current Transformer

In power grid construction, line losses reflect planning, design, and operation management. They rsquo;re key for evaluating power systems. For refined low - voltage transformer area line loss management, accurate line loss counting is critical. So, solidifying basic data, ensuring data accuracy, an

By Dyson 07/05, 2025
Outdoor CT

What might be the future development trends of outdoor current transformers?

I'm Echo, a 12-Year Veteran in the CT Industry, Talking About What's Coming Next Hi 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

By Echo 07/05, 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

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

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What Are the Steps for Error Testing GIS Voltage Transformers?

An GIS Equipment Explosion Accident Caused by PT Secondary Wiring Errors

Operation Method for PT Resonance in 500kV GIS Switching Station

What to Pay Attention to When Selecting and Installing GIS Current Transformers?

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

What are the polarity test methods for GIS current transformers?

Exploring the Design and Application of Photoelectric Current Transformers in GIS

Maintenance and Diagnostic Analysis of Current Transformers in GIS Equipment

What are the possible causes of cracking failure in CT terminal blocks within GIS equipment?

Development of an Outdoor Integrated Low - Voltage Current Transformer

What might be the future development trends of outdoor current transformers?

Ratio Trial Verification Method for Current Transformers

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