Electrical Engineering Guides

Power Systems

Why You Can't Remove Siemens GIS Bushing Cover for PD Testing

As the title suggests, when performing live partial discharge (PD) testing on Siemens GIS using the UHF method—specifically by accessing the signal through the metal flange of the bushing insulator—you must not directly remove the metal cover on the bushing insulator. Why? You won’t realize the dang

By James 10/24, 2025
Power Systems

Why Cement Sealing Is Banned for GIS Wall Penetrations？

Indoor GIS equipment typically involves wall-penetrating installations, except in cases with cable in/out connections. In most cases, the main or branch bus duct extends from indoors through a wall to the outdoor side, where it connects to porcelain or composite bushings for overhead line connection

By Echo 10/24, 2025
Power Systems

How Acoustic Imaging Locates GIS Defects

In recent years, acoustic imaging technology for GIS defect detection has developed rapidly. This technology enables intuitive sound source localization, helping operation and maintenance personnel focus on the exact location of GIS defects, thereby improving the efficiency of defect analysis and re

By Edwiin 10/24, 2025
Power Systems

What is GIS (Gas-Insulated Switchgear)? Features, Types, and Applications

What is GIS Equipment? GIS is the English abbreviation for Gas Insulated Switchgear, which is fully translated into Chinese as Gas-Insulated Metal-Enclosed Switchgear. It typically uses sulfur hexafluoride (SF6) gas as the insulating and arc-quenching medium. GIS integrates, through optimized design

By Garca 08/18, 2025
GIS VT/ PT

What are the applications of GIS voltage transformers in digital substations?

Hey everyone, I rsquo;m Echo, and I rsquo;ve been working with voltage transformers (VTs) for 12 years. From learning how to wire and do error tests under my mentor rsquo;s watchful eye, to now participating in all kinds of smart substation projects mdash; I rsquo;ve seen the power industry evolve f

By Echo 07/09, 2025
GIS VT/ PT

What should be noted when selecting and installing GIS voltage transformers?

In power systems, voltage transformers in GIS (Gas Insulated Switchgear) play a crucial role in voltage measurement and relay protection. Selecting the right model and installing it correctly is vital for the stable operation of the equipment. The following points should be noted regarding selection

By James 07/08, 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

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

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Why You Can't Remove Siemens GIS Bushing Cover for PD Testing

Why Cement Sealing Is Banned for GIS Wall Penetrations？

How Acoustic Imaging Locates GIS Defects

What is GIS (Gas-Insulated Switchgear)? Features, Types, and Applications

What are the applications of GIS voltage transformers in digital substations?

What should be noted when selecting and installing GIS voltage transformers?

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

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

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