Dowei Electric company News and Trends items

145kV Gas Insulated Switchgear (GIS) is a high-voltage switchgear system used in 132/138kV class transmission networks. It uses SF6 gas or alternative environmentally friendly insulating gases as the insulation medium and combines major high-voltage equipment—including circuit breakers, disconnectors, earthing switches, current transformers, voltage transformers, and bus...

Glass Disc Insulator, also known as a Toughened Glass Suspension Insulator or Glass Cap-and-Pin Insulator, is a high-voltage insulator used for overhead transmission and distribution lines to electrically isolate conductors from towers and support structures while withstanding mechanical tensile loads. It is manufactured from toughened (tempered) glass, combined with me...

Porcelain Station Post Insulator, also known as a Pedestal Insulator or Substation Post Insulator, is a high-voltage electrical insulation component used in outdoor substations and switchyards to support and electrically isolate busbars, disconnectors, circuit breakers, instrument transformers, and other high-voltage equipment from grounded structures. It is manufacture...

Porcelain Housing Arrester, also known as a Porcelain Surge Arrester or Porcelain Metal Oxide Surge Arrester (MOA), is a protective device used in electrical power systems to protect transformers, switchgear, transmission lines, and other high-voltage equipment from lightning surges and switching overvoltages. It uses zinc oxide (ZnO) metal oxide varistor (MOV) elements...

24kV Outdoor Voltage Transformer (VT), also known as an Outdoor Potential Transformer (PT), is an instrument transformer designed to accurately step down medium-voltage system voltages up to 24 kV into standardized low-voltage outputs for metering, protection, monitoring, and control. It is engineered for outdoor service with weather-resistant insulation and housing, ens...

24kV Indoor Voltage Transformer (VT), also known as an Indoor Potential Transformer (PT), is an instrument transformer designed to step down medium-voltage system voltages up to 24 kV into standardized low voltages for metering, protection, monitoring, and control. These transformers are commonly installed in indoor metal-clad switchgear, Ring Main Units (RMUs), and medi...

362kV Capacitor Voltage Transformer (CVT), also known as a Capacitive Voltage Transformer or Capacitor Potential Transformer (CPT), is an extra-high-voltage (EHV) instrument transformer designed for 330kV-class transmission systems. It reduces high transmission voltages to standardized low-voltage outputs used for metering, protection, control, synchronization, and power...

123kV Capacitor Voltage Transformer (CVT), also called a Capacitive Voltage Transformer or Capacitor Potential Transformer (CPT), is a high-voltage instrument transformer used in 110kV-class transmission systems to reduce high system voltages to standardized low-voltage outputs for metering, protection, control, synchronization, and automation applications. A CVT uses a...

123kV Inductive Voltage Transformer (IVT), also known as a Potential Transformer (PT) or Voltage Transformer (VT), is a high-voltage instrument transformer designed to accurately reduce transmission system voltages up to 123 kV to standardized low-voltage outputs for metering, protection, monitoring, and control. It provides galvanic isolation between the high-voltage ne...

24 kV Current Transformer (Outdoor Type) is a medium-voltage instrument transformer designed for 24 kV power systems, typically used on 22 kV distribution networks. It is installed in outdoor substations, pole-mounted structures, and open-air switchyards to measure high primary current and convert it into a standardized secondary current (usually 1 A or 5 A) for metering...

Bushing Current Transformer (BCT) is a type of current transformer installed around the bushing of a power transformer, circuit breaker, or switchgear. It is designed to measure current or provide protection signals by using the existing high-voltage bushing as the primary conductor. Unlike standalone CTs, a BCT does not require a separate primary structure. Instead, it...

24 kV Current Transformer (Indoor Type) is a medium-voltage instrument transformer designed for 24 kV power systems, commonly used on 22 kV and 20 kV distribution networks. It accurately converts high primary current into a standardized secondary current (typically 1 A or 5 A) for metering, protection, monitoring, and control while providing complete electrical isolation...

12 kV Current Transformer (Indoor Type) is a medium-voltage instrument transformer designed for 12 kV power systems (typically used on 11 kV distribution networks). It accurately converts high primary current into a standardized secondary current (typically 1 A or 5 A) for metering, protection, monitoring, and control while providing complete electrical isolation between...

245 kV Current Transformer (Top-core Type) is an extra-high-voltage (EHV) outdoor instrument transformer designed for 245 kV systems, commonly used on 220 kV transmission networks. It accurately converts high primary current into a standardized secondary current (typically 1 A or 5 A) for metering, protection, monitoring, and control while providing complete electrical i...

145 kV Current Transformer (Top-core Type) is a high-voltage outdoor instrument transformer designed for 145 kV systems, typically used on 132 kV transmission networks. It converts high primary current into a standardized secondary current (typically 1 A or 5 A) for metering, protection, monitoring, and control while providing complete electrical isolation between the hi...

36 kV Current Transformer (Top-core Type) is a medium-voltage outdoor instrument transformer designed for power systems with a rated voltage of 36 kV (typically used on 33 kV networks). It measures high primary current and converts it into a standardized secondary current (typically 1 A or 5 A) for metering, protection, and control while providing electrical isolation be...

362 kV Current Transformer (Hair-pin Type) is an extra-high-voltage (EHV) instrument transformer designed to accurately transform high primary currents into standardized low secondary currents (typically 1 A or 5 A) for metering, protection, and monitoring in 362 kV substations. The "hair-pin" designation refers to the primary conductor configuration, where a U-shaped (h...

145 kV Current Transformer (Hair-pin Type) is a high-voltage outdoor instrument transformer used in 132 kV and 145 kV air-insulated substations (AIS). It accurately converts high primary currents into standardized secondary currents (1 A or 5 A) for protective relays, energy metering, fault recording, and substation automation. The hair-pin type features an integral U-sh...

36 kV Current Transformer (Hair-pin Type) is a medium-voltage instrument transformer designed to measure high primary currents and provide scaled, isolated current signals for metering, protection, and control. The term "hair-pin type" refers to the shape of the primary conductor, which is bent like a hairpin (U-shaped), forming an integral primary winding through the tr...

Semi-Pantograph Disconnector (Semi-Pantograph Isolator) is a high-voltage disconnector used in air-insulated substations (AIS) to provide visible electrical isolation of transmission equipment. It combines features of a conventional disconnector and a pantograph mechanism, making it particularly suitable for substations with restricted space or where equipment is mounted...

Automatic Circuit Breaker (Recloser), commonly known as a Recloser or Automatic Circuit Recloser (ACR), is an intelligent medium-voltage switching device that automatically interrupts fault current and then attempts to restore power by reclosing after a preset time delay. It is designed to clear temporary (transient) faults—such as those caused by lightning, tree branche...

Outdoor Vacuum Circuit Breaker (Dog-house) is a medium-voltage outdoor circuit breaker in which one or more vacuum interrupters are enclosed within a weatherproof metal housing, commonly called a dog-house because of its distinctive roofed enclosure. The housing protects the interrupters, operating mechanism, and control equipment from rain, dust, sunlight, ice, and othe...

MV Transformer Station (Medium Voltage Transformer Station) A Medium Voltage Transformer Station (MV Transformer Station), also called a Medium Voltage Substation, Compact Substation, or MV/LV Distribution Substation, is an electrical facility that receives medium-voltage power, transforms it to low voltage, and distributes electricity to end users or industrial loads. ...

A Low Voltage Regulator (LV Regulator), also called a Low Voltage Automatic Voltage Regulator (LV AVR) or Voltage Stabilizer, is an electrical device designed to maintain a stable low-voltage output voltage by compensating for fluctuations in the incoming power supply. It is commonly used in commercial buildings, industrial facilities, data centers, and sensitive electr...

A Medium Voltage Regulator (MV Regulator) is an electrical device used to automatically maintain and stabilize the voltage level of medium-voltage distribution systems by increasing or decreasing the line voltage. It improves power quality, compensates for voltage drops along feeders, and ensures electrical equipment receives a stable supply voltage. It is commonly inst...

Energy Storage System (BESS – Battery Energy Storage System) A Battery Energy Storage System (BESS) is an energy storage solution that stores electrical energy in batteries and releases it when required. It enables better integration of renewable energy, improves grid stability, provides backup power, and supports peak-load management. A typical BESS installation combi...

Modular prefabricated substations are similar to E-houses in that they also house electrical equipment. However, they are typically larger and more complex, often including more than one building or module up to 245kV system. Modular prefabricated substations are designed to be installed in a variety of locations, including outdoor environments, and are often used in i...

General Description: The GLRoad Transformer Dissolved Gas Analysis (DGA) is capable of monitoring and analyzing nine types of dissolved gases in transformer oil, featuring high measurement accuracy, high reliability, real-time monitoring, and maintenance-free operation. By utilizing semiconductor lasers and laser spectroscopy technology, the device significantly improv...

Dowei Electric's work in Power Transmission and Distribution (T&D), this typically involves equipment and services related to managing and delivering electricity from generation stations to consumers. Dowei Electric provide solutions like: Transformers: 1.Step-up and step-down transformers. 2.Specialized transformers for industrial or renewable energy applications. Swi...

>> Main portfolio: ·Transformer, Transformador ·Circuit Breaker, Interruptor ·Disconnector, Seccionador ·Current Transformer, Transformador de corriente ·Voltage Transformer,Transformador de potencial ·Surge Arrester, Pararrayos ·Insulator, Aislador ·Switchgear, Switchgear ·Substation, Subestación ·Capacitor, Condensador ·Reactor & Line Trap, Reactor y Trampa de línea ·F...

Kiosk Substation (Unit Substation) >>Enjoy the ease of using switchgear kiosks substation Every kiosk substation (Unit Substation) project we complete is a little bit different, but one thing remains the same—these switchrooms are easy to use. Our solution is usually complete after final commissioning and installation, but the experience of the end user is never far fr...

Type OVCB series vacuum circuit breakers -Rated working voltage: 12 kV, 15 kV, 17.5 kV, and 36 kV, up to 40.5kV -Lightning impulse level (BIL): 75 kV, 125 kV up to 185 kV -Rated continuous current: 630 A up to 3,150 A -Rated short-time withstand current: 20 kA, 25 kA and 31.5 kA up to 40 kA Advanced Technology for Improved Reliability By combining the latest development...

Technical specification: -6000kvar-30000kvar -Submerged arc furnace low voltage side short network filter compensation complete set -Industrial ore furnace -High voltage reactor reactive power compensation pure copper coil anti-interference harmonic control -Reactor, series/parallel -For inverter and speed regulator -Reactive power compensation pure copper coil high volt...

Introduction. Possible faults in a transformer >>EXTERNAL -External Short Circuits -Overloads -Overvoltages >>INTERNAL -Short circuits, between turns, between windings -Ground faults -Overtemperature -Overpressure -Miss of oil Introduction. Transformers protections >>INTERNAL -Buchholz (SPR) -Thermometer -Thermostat -Thermal Image -Oil Level -Pressure Relief Valve -B...

FCL-limiter is a fault current limiter, based on pyrotechnic technology, which can limit a fault current passing trough it within the first half cycle, and enables switching in 10 ms. The use of FCL-limiter allows equipment to remain in service even if the prospective fault current exceeds its rated peak and short-time withstand current, and in the case of circuit breake...

Dead tank circuit breaker - the well grounded For applications from 72.5 kV up to 550 kV In contrast to live tank circuit breakers, dead tanks have a metal-enclosed interrupter unit, and the housing is always grounded. Therefore they are called dead tank circuit breakers. For certain substation designs, dead tank circuit breakers might be required instead of the standar...