Main functions of data center computer room The Use and Principle of Current Transformer Acrel Support Olympic Winter Games Beijing 2022 Power Supply Solution for Winter Olympics Wireless Temperature Solution at Beijing Daxing International Airport Acrel Releases ADW300 with 333mV Access Energy meters used in urban comprehensive pipe gallery projects Base Station Energy Consumption Monitoring Solution Application of Residual Current Monitor in Street Lighting Discussion on the Combination of MQTT Comprehensive Insights into Temperature Measurement in Industrial Processes DIN Rail Energy Meters: A Comprehensive Guide Operational Principles of Medium Voltage Protection Relays Working Principles and Wiring of Various Types of Electric Meters Digital Electric Energy Meter VS Electronic Electric Energy Meter Problems and Common Fault Analysis of Current Transformers During Operation Detection and Marking of Current Transformers The Functions and Working Principles of Current Transformers Application of DC Current Meters in Substation DC Measurement Operation Methods and Precautions of Current Transformers The Detection and the Open Circuit Fault Inspection of Current Transformers Models, Structures and Installation Methods of Different Hall Current Sensors The Working Principles of the DC Current Shunts How to Set the Temp and Humidity Controller? Precautions of Multifunction Meter Storage Principle and Characteristic Parameters of Hall Current Sensor Multi-function Instrument Definition and Troubleshooting The Use of Prepayment Energy Meter and Its Advantages over Induction Meter Basic Functions of Smart Prepaid Electricity Meter in Student Dormitories How to Use the Multi Function Energy Meter? What Functions Does It Have? Factors That Affect the Performance and Use Value of Prepayment Energy Meter Application of ​IoT Based Electricity Energy Meter Application of Wireless Temperature Sensor in Press What is the Significance of Smart Energy Meter Applications? Smart Energy Meter Application What Are the Common Faults of Current Transformers? Operation Precautions of Current Transformers and the Cause of Burning The Principle and Use of Through-core Current Transformers The Wiring Principle of Current Transformers Design Features of Wireless Temperature Sensors Errors of Daily Current Transformers Common Problems and Solutions of Multifunctional Power Meters A Brief Introduction to the Application and Specifications of DC Shunts What Do You Need to Know to Apply DC Shunts? What Are DC Shunts Made Of? Precision DC Shunts Are High Precision Resistors That Are Critical to Precision Requirements and Accuracy Application Analysis of Current Transformers Fixing Method of Split Current Transformer What is a Smart Gateway? The Difference Between Current Transformer and Zero Sequence Current Transformer Can Ordinary Current Transformers Be Used As Zero-sequence Current Transformers? Structural Difference Between Through-core Current Transformer and Ordinary Current Transformer Wiring Principle of Through-core Current Transformer Introduction to the Principles of Use of Open Current Transformers The application scope of zero sequence current transformer is introduced Standard for operation of three-phase integrated current transformers Installation and use of current transformer How to choose the core type of open current transformer? Working Principle, Structure, and Method for Determining Saturation Point of Current Transformer Confirmation of Current Transformer Saturation Level and Accurate Measurement of Saturation Points Inspection of Connection of Current Transformers Causes and Preventive Measures of Burnout in Current Transformers What Is the Reason for Burnout of Current Transformers During Use? Differentiation of Types of Current Transformers Installation Requirements and Fixing Methods of Split Core Current Transformers Considerations for Operating Current Transformers Issues and Solutions for Installation of Zero-Sequence Current Transformers What Are the Issues to Be Aware of During the Operation of Open-Type Leakage Current Transformers? Application and Requirements of Zero Sequence Current Transformers Principles, Functions, and Classification of Zero-Sequence Current Transformers Main Technical Requirements for Current Transformers Fault Detection and Handling Methods for Open-circuit and Short-circuit on the Secondary Side of Current Transformers Misconceptions in the Use of Current Transformers and Precautions in Work Teaching You the Correct Use of a Through-core CT Current Transformer Operation Considerations and Installation Methods of Split-core Zero-sequence Current Transformers What Do These Parameters Represent in the Din Energy Meter? Main Performance of Open-Type Current Transformers Selection and Calculation of Actual Usage of the Din Energy Meter Things You Don't Know About the Din Energy Meter What Functions Does the Multi-functional Smart Din Rail Electricity Meter Have? Breaking Barriers: How Wireless Technology Transforms Temperature Monitoring in Industry From Factory Floors to Warehouses: Industrial Applications of Wireless Temperature Monitoring Systems Smart Solutions for Energy Monitoring: Harnessing DC Digital Multifunction Meters Smart Energy Monitoring Made Simple: The Magic of Multi-Function Energy Meters Understanding DC Digital Multifunction Meters: Features and Applications Demystifying DIN Rail Meters: A Comprehensive Guide to Their Functionality From Voltage to Current: The Versatility of DC Digital Multifunction Meters Din Rail Meters: Unlocking Precise Energy Measurement in Your Electrical System Choosing the Right Din Rail Meter for Your Specific Energy Monitoring Needs Cutting the Cords: Advantages of Industrial Wireless Temperature Monitoring Systems Saving Energy, Saving Costs: How DIN Rail kWh Meters Make a Difference Streamlining Energy Monitoring: Advantages of DIN Rail Mounted Electricity Meters Efficient Energy Monitoring: Unleashing the Power of DIN Rail kWh Meters Maximizing Space and Functionality: The Benefits of DIN Rail Mounted Meters Unlocking the Potential: Applications of DIN Rail Mounted Electricity Meters A Closer Look at DIN Rail kWh Meters: Features and Applications Efficiency Redefined: How Multi-Function Energy Meters Are Transforming Energy Management Unlocking Energy Insights: The Advantages of Multi-Function Energy Meters From Factory to Field: Industrial Wireless Temperature Monitoring Solutions Precision in Production: The Role of Industrial Wireless Temperature Monitoring Behind the Scenes: How Hospital Isolated Power Systems Keep Healthcare Facilities Running Powering Patient Care: the Importance of Hospital Isolated Power Systems Measuring the Flow: The Science behind DC Current Meter Shunts Powering Your World: How to Select the Ideal Power Meter Supplier Efficiency in a Compact Package: The Benefits of Din Rail Electric Meters Empowering Efficiency: The Role of a Power Monitoring Device Overview of the importance of temperature monitoring in various industries How Does a Multi-Function Energy Meter Compare to Traditional Energy Meters? Do you Know a DC kWh Power Meter? Your Essential Guide on How to Use DC Current Meter Shunts The Role of Isolated Power Panels for Healthcare Facilities Unveiling the Significance of DIN Rail Electricity Meters Unveiling the Soaring Popularity of DIN Rail Electricity Meters How to Choose the Right Multi-function Meter for Your Needs? Din Rail Electricity Meter: Smart Choices for Efficient Energy Management Types of Prepaid Meters: Navigating Efficiency in Commercial Power Management Unveiling the Contrasts between Credit and Prepayment Energy Meters Single Phase vs Three Phase Digital Energy Meters: Powering Industrial Efficiency How Do I Install a DIN Rail Energy Meter? How Can a 3 Phase Digital Energy Meter Help Identify and Detect Power Imbalances? Dc Kwh Meter Provides Kwh-Based Charging for Dc Wallboxes The Future of Isolated Power Panels in Hospitals

Fault Detection and Handling Methods for Open-circuit and Short-circuit on the Secondary Side of Current Transformers

Due to the small impedance allowed in the secondary circuit of the current transformers during normal operation, it approaches a short circuit state with very little sound, leading to the common misconception of it being silent.

Faults in the current transformers often come with sound or other phenomena. If the screws that hold the silicon steel sheets in place in the iron core are not tight enough, the silicon steel sheets will loosen and the alternating magnetic flux in the iron core will change.

As the alternating magnetic flux in the iron core changes, the amplitude of the vibration of the silicon steel sheets increases, resulting in a buzzing sound. This sound does not change with load and will persist for a long time. At light or no load, the end of some separated laminated silicon steel sheets vibrate, forming a certain buzzing sound. This sound sometimes exists and sometimes doesn't, and disappears as the load on the circuit increases.

  • When the secondary circuit of the current transformers is open-circuited and the current is 0, the impedance is infinitely high and the secondary winding produces a high electromotive force, with a peak value of several thousand volts. As the secondary circuit is in a closed state during normal operation of the current transformers, the magnetic flux generated by the secondary side magnetic flux acts as a demagnetizing effect on the primary side magnetic flux.

  • When the secondary side of the CT current transformer is open-circuited, the demagnetizing magnetic flux disappears, and the magnetic flux inside the iron core increases, reaching a state of severe saturation. This generates a waveform with a flat-topped wave as the magnetic flux changes over time. As the induced electromotive force of the secondary winding is proportional to the magnetic flux change, it is apparent that the iron core may become overheated and burn out the CT current transformer. Due to the increase in magnetic flux density and the non-sinusoidal nature of the magnetic flux, the silicon steel sheets oscillate unevenly, generating a loud noise.

  • When the secondary side of the CT current transformer is open-circuited, the operator should wear insulated shoes and insulated gloves, short-circuit the experimental terminal of the secondary circuit of the faulty CT current transformer on the distribution cabinet, and stop checking and handling the issue. If the above measures are ineffective, it is considered that the current transformer may have an internal fault and should be discontinued from use. If the current transformer may cause maintenance and installation actions, relevant maintenance and installation should be stopped.

  • When the secondary winding or circuit of the CT current transformer shorts, it can cause the electric energy meter, power meter and other indicators to show zero or reduced values, while also causing relay protection to malfunction or not operate. If the operator does not detect this fault in time and continues to load under normal conditions, it will cause equipment damage due to overload. After such a fault occurs, the load should be kept unchanged and maintenance and installation that may cause malfunctions should be stopped, and repair personnel should be notified to eliminate the issue promptly.

If smoke or fire is detected inside the current transformers, it should be cut off with a circuit breaker and extinguished with sand or a fire extinguisher.

Related Articles about Acrel



Popular Acrel Energy Meter Products Recommended