Electrical Engineering Guides

AIS CT

What are the common faults of current transformers in air-insulated switchgear?

Hey everyone, I'm Felix, and I've been working in the power system field for 10 years. From following senior engineers on-site to leading teams handling various substation equipment failures, I rsquo;ve worked with many types of current transformers (CTs), especially those used in air insulated swit

By Felix Spark 07/12, 2025
Outdoor VT/ PT

Analysis and Handling of Metering Abnormality of 35 kV Outdoor Combined Transformer

1. Introduction Frequent occurrences of PT burnout and primary - side fuse melting in combined transformers lead to inaccurate energy meter measurement and seriously threaten the safe operation of the power grid. This paper focuses on the repeated PT damage and fuse melting issues of a 35 kV combine

By Felix Spark 07/10, 2025
Outdoor VT/ PT

Analysis of an Explosion Accident of a 35 kV Voltage Transformer

Voltage transformers (PTs) consist of iron cores and winding coils, working similarly to transformers but with small capacity. They convert high voltage to low voltage for protection, measurement and metering devices, widely used in plants/stations. Classified by insulation: dry - type ( le;6 kV), c

By Felix Spark 07/10, 2025
Outdoor CT

What Tests Does a Qualified Outdoor Current Transformer Need to Pass?

Hey everyone, I rsquo;m Oliver, and I rsquo;ve been working in current transformer (CT) testing for 8 years. From running around with test equipment on site to now leading full inspection teams, I rsquo;ve seen how thousands of outdoor CTs go through a whole series of tests mdash; like going through

By Oliver Watts 07/09, 2025
Outdoor CT

What are the methods to reduce the failure rate of outdoor current transformers?

1. Research Reasons and Background 1.1 Importance of Current Transformers Current transformers play the role of current transformation and electrical isolation. They convert the large current of the primary system into a proportional small secondary current, which is supplied to measuring instrument

By Felix Spark 07/09, 2025
GIS PT

What are the causes of the breakdown and burning of the 35 kV GIS voltage transformer?

1. Accident Overview 1.1 Structure and Connection of 35kV GIS Switchgear Voltage Transformer The ZX2 gas-insulated double-bus switchgear, manufactured in March 2011 and officially put into operation in July 2012, is configured with two groups of bus voltage transformers (PTs) for each bus section. T

By Felix Spark 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 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

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What are the common faults of current transformers in air-insulated switchgear?

Analysis and Handling of Metering Abnormality of 35 kV Outdoor Combined Transformer

Analysis of an Explosion Accident of a 35 kV Voltage Transformer

What Tests Does a Qualified Outdoor Current Transformer Need to Pass?

What are the methods to reduce the failure rate of outdoor current transformers?

What are the causes of the breakdown and burning of the 35 kV GIS voltage transformer?

An GIS Equipment Explosion Accident Caused by PT Secondary Wiring Errors

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?

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