Electrical Engineering Guides

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

Why Does the Secondary Insulation of Outdoor Current Transformers Drop?

I'm Felix, a 15-Year Veteran in the CT Industry, Sharing What You Need to Watch Out For Hi everyone, I'm Felix, and I've been working with current transformers (CTs) for over 15 years. Today, let rsquo;s talk about why the secondary insulation of outdoor CTs sometimes drops, and what you can do to p

By Felix Spark 07/05, 2025
CT

What are the troubleshooting methods for current transformers?

As a front - line fault maintenance worker, I deal with current transformers (CTs) daily. A CT rsquo;s secondary winding in operation must never open - circuit! Once open - circuited, the secondary current and demagnetizing potential vanish. All primary - side magnetic potential then becomes the iro

By Felix Spark 07/04, 2025
CT

What are the causes of current transformer faults and the countermeasures for faults?

As a front - line maintenance technician, I deal with current transformers (CTs) daily. CTs convert high - magnitude primary current to low - magnitude secondary current for substation/line protection and measurement, operating in series long - term. However, they face faults from external (unbalanc

By Felix Spark 07/03, 2025
VT

Case Analysis of Abnormal Secondary Circuits in Voltage Transformers

1. Fault Situation In September 2023, as a front - line fault maintenance worker, I detected abnormal voltage on the 10kV Section I bus of a substation during monitoring duty and informed the operation and maintenance team. The monitoring system showed: U 0 = 0 kV , U a = 6.06 kV , U b = 5.93 kV , U

By Felix Spark 07/02, 2025
VT

What are the causes of failure of ferromagnetic voltage transformers in new energy power stations?

By Felix, 15 Years in the Electrical Industry Hi everyone, I'm Felix, and I've been working in the electrical industry for 15 years. From early involvement in traditional substation commissioning and maintenance to now managing electrical system operations for multiple photovoltaic and wind power pr

By Felix Spark 07/02, 2025
Dry type transformer

What are the reasons for low insulation at the low-voltage side of a dry-type transformer?

Hi everyone, I rsquo;m Felix, and I rsquo;ve been working in electrical equipment fault repair for 15 years. Over these years, I rsquo;ve traveled across factories, substations, and distribution rooms all over the country, troubleshooting and repairing all kinds of electrical equipment. Dry-type tra

By Felix Spark 07/01, 2025
Dry type transformer

What are the causes of dry-type transformers burning out during operation?

1 Fault Phenomenon I am engaged in front - line fault maintenance work, and recently encountered problems with dry - type transformers. Dry - type transformers have a simple structure, are convenient for transportation, and easy for maintenance. They are widely used in power distribution places with

By Felix Spark 07/01, 2025
Load switch

Method for Automatic Isolation of Customer Equipment Faults by Load Switches in Distribution Networks

1 Overview Distribution network safety has long been under - addressed, with its automation lagging substation automation . Using 10 kV intervals of existing substations to set line section points meets future grid needs . Configuration of distribution switches, section switches, and protection must

By Felix Spark 06/30, 2025
Failure and maintenance

What You Need to Know About Load Switch Malfunctions

Hey there, I’m Blue — been working as an electrical engineer for more than 20 years now. I’ve spent most of my career designing circuit breakers, managing transformers, and helping power companies solve all sorts of electrical system challenges. Today, a friend from Southeast Asia asked me: "What ar

By Master Electrician 06/30, 2025
Load switch

What are the common faults of load switches?

As an on-site maintenance technician, I frequently deal with electrical, mechanical, and insulation faults in load switches. The following outlines fault manifestations, causes, and solutions: I. Electrical Fault Handling (1) Contact Heating Contact heating is mainly caused by poor contact, insuffic

By Felix Spark 06/28, 2025

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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?

Why Does the Secondary Insulation of Outdoor Current Transformers Drop?

What are the troubleshooting methods for current transformers?

What are the causes of current transformer faults and the countermeasures for faults?

Case Analysis of Abnormal Secondary Circuits in Voltage Transformers

What are the causes of failure of ferromagnetic voltage transformers in new energy power stations?

What are the reasons for low insulation at the low-voltage side of a dry-type transformer?

What are the causes of dry-type transformers burning out during operation?

Method for Automatic Isolation of Customer Equipment Faults by Load Switches in Distribution Networks

What You Need to Know About Load Switch Malfunctions

What are the common faults of load switches?

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