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What are the monitoring methods and future development trends of low-voltage voltage transformers?
Using automation With the continuous advancement of smart grid technology, intelligent monitoring systems are playing an increasingly important role in preventing and addressing faults in voltage transformers. These modern intelligent monitoring systems can collect key parameters from voltage transformers in real time—such as partial discharge levels, temperature, and oil quality—and use data analysis algorithms to assess the health status of the equipment, enabling early fault warnings and precise l
Echo
07/16/2025
What are the common faults of low-voltage voltage transformers?
Using automation 1. Open - Circuit Fault on the Secondary SideOpen - circuit in the secondary side is a typical fault of low - voltage voltage transformers, showing abnormal voltmeter readings (zero/fluctuation), faulty power meters, buzzing noises, and core overheating. When open - circuited, the secondary voltage spikes (no secondary current to balance the primary EMF), causing core saturation, flux distortion, and potential overheating/damage.Causes include loose terminals, poor contact, or human error. In lo
Oliver Watts
07/16/2025
A Quick Verification Method for Low-Voltage Current Transformers
Using automation 1. Selection of Low - Voltage Current Transformer ConfigurationThere are many factors leading to wrong selection of low - voltage current transformers in civil construction projects. For example, common factors include design problems: the calculated coefficient designed for the load of electrical equipment is relatively large, or the transformation ratio of the current transformer is selected incorrectly. Such a series of reasons will affect the use of electrical equipment. Therefore, in the co
James
07/16/2025
A Quick Verification Method for Low-Voltage Current Transformers
Using automation To ensure safe operation of the power system, power equipment operation must be monitored/measured. General devices can’t connect to primary high - voltage equipment directly; instead, large primary currents are scaled down for current transformation, electrical isolation, and use by measurement/protection devices. For AC large - current measurement, conversion to a unified current eases secondary instrument use.Current transformers split into measurement - and protection - type, with accu
Oliver Watts
07/16/2025
Research on Low - Voltage Anti - DC Current Transformer and Detection Device
Using automation 1. Overview of Components and IssuesTA (low-voltage current transformer) and electric energy meters are key components of low-voltage electric energy metering. The load current of such meters is no less than 60A. Electric energy meters vary in type, model, and anti-DC performance, and are connected in series in the metering device. Due to the lack of anti-DC capability, they suffer from metering errors under DC component loads, usually caused by non-linear loads. With the increasing use of DC or
Dyson
07/16/2025
Anti - Theft Device for Low - Voltage Current Transformers
Using automation 1. Innovation BackgroundWith the progress of society and economic development, the electricity demand of power users is expanding increasingly. Lawbreakers, aiming to save electricity costs and pursue high profits, gradually use high - tech methods to steal electricity, causing huge economic losses to power supply enterprises. Currently, popular electricity theft methods in the market include illegally opening the wiring cover of low - voltage transformers in electric energy metering boxes, alte
Dyson
07/16/2025
What aspects should be taken into consideration during the design of AIS voltage transformers?
Using automation I. Key Elements of Mechanical Structure DesignThe mechanical structure design of AIS voltage transformers ensures long - term stable operation. For 66 kV outdoor AIS voltage transformers (pillar - type structure):Pillar Material: Use epoxy resin casting + metal frame for mechanical strength, pollution/weather resistance. Special design needed for 66 kV (vs 35 kV & below). Dry - type insulation (porcelain/epoxy shell) requires sufficient bending/impact resistance for harsh outdoors.Heat Dissi
Dyson
07/15/2025
What are the impacts of temperature on AIS voltage transformers?
Using automation Impact on Insulation PerformanceChanges in Insulating Material Properties: AIS voltage transformers rely on air as the insulating medium, and they also contain some solid insulating materials, such as insulating paper and insulating bushings. When the temperature rises, the migration and evaporation of moisture in solid insulating materials like insulating paper will accelerate, resulting in a decrease in the electrical strength of the insulating materials and an increased risk of insulation bre
Echo
07/15/2025
Fault Analysis of Single - Phase Grounding of Three - Phase 4PT Voltage Transformer
Using automation In 10 kV and 35 kV ungrounded systems, single - phase grounding faults cause minimal current, so protection rarely trips. Per regulations, operation is limited to 2 hours; prolonged undetected faults may worsen, even damaging switches. While the State Grid promotes small - current grounding line selection devices in 110 kV and 220 kV substations, their accuracy remains low, requiring monitoring/operation staff to analyze remote measurements. For ungrounded systems with three - phase 4PT voltage
Felix Spark
07/15/2025
What are the key technical points for the selection and installation of AIS voltage transformers in 66kV outdoor substations?
Using automation Hey everyone! I'm James, a professional with over 10 years of experience installing voltage transformers. Today, I want to talk about the selection and installation of Air Insulated Switchgear (AIS) voltage transformers in 66kV outdoor substations.These devices are critical for measurement and protection in power systems. Their proper selection and installation directly affect the safety and stability of the entire electrical grid. With the advancement of smart grid technology, electronic AIS vo
James
07/15/2025
How is the application and development of AIS voltage transformers in 66kV outdoor substations?
Using automation Hey everyone! I’m Echo, and today we’re diving into the application and development of Air Insulated Switchgear (AIS) voltage transformers in 66kV outdoor substations. These devices play a crucial role in power systems, not just for measurement but also for protection and control. As technology advances, they continue to evolve to meet higher performance demands and stricter environmental standards. Let’s take a closer look!ApplicationsVoltage MeasurementOne of the primary task
Echo
07/15/2025
What Tests Are Required for a Qualified AIS Voltage Transformer?
Using automation Hey everyone! I’m Oliver, an experienced electrician with over a decade in the power system industry. Today, we’re diving into a practical topic — what tests are required to ensure an Air Insulated Switchgear (AIS) voltage transformer is qualified? These tests are crucial not only for ensuring the device operates correctly but also for maintaining the safety and stability of the power grid. Let’s get started!1. Visual InspectionFirst Look MattersThe very first step is a v
Oliver Watts
07/14/2025
What Are the Common Failures of AIS Voltage Transformers?
Using automation Hey everyone! I’m Felix, a 10-year veteran in the power system industry. Today, we’re going to dive into an important topic — what are the common failures of Air Insulated Switchgear (AIS) voltage transformers? How do you identify these issues, and how can they be resolved? Let’s get started!1. Insulation DamageThe Problem You Might Encounter:One of the most frequent issues is insulation damage. This typically happens due to aging insulation materials, overvoltage surges,
Felix Spark
07/14/2025
Fault Analysis and Diagnosis on Current Transformer
Using automation Current transformers are numerous in substations and are key equipment to ensure the normal operation of the system. If a current transformer fails, it will cause the circuit breaker to trip and may even evolve into a power outage event, which will have an adverse impact on the safe and stable operation of the power grid. Taking an event of the main transformer differential protection operation caused by the failure of the current transformer on the low-voltage side of the main transformer in a
Felix Spark
07/14/2025
What does the maintenance of current transformers involve?
Using automation Fault Prevention and Handling of Current Transformers1 Handling of Oil Leakage in Current TransformersOil - immersed current transformers are most prone to oil leakage. Common oil - leakage parts mainly include the secondary outlet box, the upper and lower sealing surfaces of the porcelain sleeve, the oil tank, the base, the oil conservator, and the metal expander.Methods for handling oil leakage: For oil leakage at the secondary outlet box, if the small porcelain sleeve or terminal board is cra
Felix Spark
07/14/2025
What does the maintenance of current transformers involve?
Using automation 1 Basic Operation RequirementsThe technical parameters of current transformers shall meet the actual operation needs. Carefully check the nameplate of the current transformer to confirm whether its technical parameters meet the requirements. Current transformers for metering must be selected with rated loads and accuracy classes that meet the requirements in accordance with relevant metering standards. The actual load connected to the secondary winding of the current transformer shall be within
Felix Spark
07/14/2025
How to select a current transformer?
Using automation 1 Role of Current TransformersCurrent transformers are used to sense the magnitude of current and isolate the primary system from the secondary system. The primary winding of a current transformer used in a power system is connected in series in the primary high - voltage system, and the secondary winding is connected to measuring instruments and relay protection devices. It induces the current in the primary high - voltage system and converts it into a low - voltage small current on the seconda
James
07/14/2025
What Is the Development Trend of AIS Current Transformers?
Using automation Hey everyone, I'm Echo, a 10-year veteran in the power system industry. Today we’re going to talk about an important topic — the future development trends of current transformers (CTs) used in Air Insulated Switchgear (AIS).As technology advances and market demands evolve, these critical components are also undergoing continuous innovation. In this article, I’ll walk you through the key directions of future development based on my hands-on experience and industry observations.1
Echo
07/12/2025
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