Gopower @gopower - Tumblr Blog

Posts

Outdoor VCB vacuum circuit breaker maintenance and precautions 1. During the regular maintenance and inspection of outdoor vacuum circuit breaker, the general tasks are: measuring the overtravel and stroke of the circuit breaker; Check the vacuum interrupter for air leakage; Check whether the grounding wire of the secondary circuit is loose; Check whether the contact of auxiliary switch is good; Measure the resistance value of each phase main circuit; Remove the dust adsorbed on the conductive part and insulator; Check the fastening bolts for looseness. 2. Precautions: the switch tube of VCB breaker in operation should be monitored at any time. If pole mounted recloser is found that the contact in the switch tube is not connected or only one contact is charged, and the red or milky glow appears on the inner wall of the switch tube, the emptiness in the tube is reduced and can not be used any more. The outdoor VCB breaker tube should be replaced immediately. Outdoor VCB auto circuit recloser function Protect large silicon rectifier and other high voltage electrical equipment, such as 11kv outdoor circuit breaker and 24kv vacuum circuit breaker. When the vacuum circuit breaker is in the closing position, its ground insulation is borne by the supporting insulator. Once the permanent ground fault occurs in the circuit connected to the vacuum automatic circuit recloser and the ground fault point is not cleared after the circuit breaker tripping, the ground insulation of the current bus is also borne by the vacuum gap of the circuit breaker fracture; When various faults break, the vacuum insulation gap between a pair of contacts on the fracture surface should withstand the effects of various recovery voltages without breakdown. Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

#outdoor #vcb #breaker

The maintenance methods of automatic circuit recloser or routine maintenance of it: how to ensure it is in good working state, clean pipe protection, replace rubber parts regularly and check the main components regularly. These ensure the normal operation of outdoor vacuum circuit breakers. In order to keep it in good working condition, the maintenance and management must be strengthened. The following are the maintenance methods of the outdoor VCB vacuum circuit breaker provided by Gopower. Inquiry China vacuum circuit breaker price from auto recloser manufacturer. 1. Keep the automatic circuit recloser in a nice environment (1) The humid gas is decomposed into hydrogen, oxygen and other mixed gases under the action of arcing, which damages the insulation between the fractures and the main contact. It makes the arc difficult or reburning. What is worse, it may cause the explosion of the arc extinguishing chamber. (2) The insulation strength of the supporting porcelain bottle and the arc extinguishing chamber are reduced, which results in surface discharge. (3) The patent leather, rust slag and other foreign objects in the pipeline of the vacuum circuit breaker may block the airport, so that the main circuit breaker action failure, the clamping phenomenon occurs. (4) If the foreign objects enter the arc extinguisher chamber, it may cause poor contact, so that the nonlinear resistance will be burned due to long-term electricity. And it will cause the nonlinear resistance porcelain bottle to burst seriously. Therefore, the intake pipe of the main circuit breaker air storage cylinder is equipped with an oil and water separator, and the lower part of the water discharge valve. All these regularly drained during the use and maintenance of pole mounted auto recloser to keep the air path clean. 2. Replace the rubber parts of automatic circuit recloser regularly The main automatic recloser is a kind of pneumatic and electric with a complex structure. And power line recloser's components have high requirements on sealing performance. In order to ensure good sealing performance, the rubber parts of outdoor vacuum circuit breakers should be replaced regularly. 3. Check the main components of outdoor VCB vacuum circuit breaker regularly (1) Arc extinguishing chamber The state of the recovery spring of its main contact over range and moving contact should be regularly detected. Due to the mutual friction and frequent parting and closing, the dynamic and static contacts will wear, which results in the reduction of over range and contact pressure. When the over range is reduced to a certain extent, the dynamic and static contacts should be replaced. When the deformation of the moving contact recovery spring exceeds a certain limit, it must be replaced in time. (2) Nonlinear resistance Keeping the inside of the nonlinear resistance porcelain bottle clean and sealed. Replacing the desiccant in the vacuum load break switch nonlinear resistance porcelain bottle regularly. Checking the resistance value of the nonlinear resistance plate, and replacing it in time when the change of the resistance value exceeds a certain limit. (3) Main valve Checking the fit size between piston and valve body regularly. If the size does not meet the requirements, it should be replaced in time. (4) Transmission air cylinder To adjust the buffer of the transmission air cylinder properly. To ensure the disconnecting switch works well. Checking the matching accuracy between the piston of outdoor VCB breaker and cylinder block regularly. These ensure its good action performance by dressing or replacing parts. (5) Ventilation plug door The filler in the stopper must be replaced regularly, and the ventilation rate of the stopper must be tested. And adjusting it to the allowable range.

#vcb #breaker #maintenance

Broadly speaking, there will be many types of high-voltage ring network cabinets, including vacuum circuit breakers, gas-filled cabinets, and central cabinets. sf6 gas load circuit breaker is called ring main unit or high voltage ring main unit in the power industry. Although vacuum circuit breaker cabinets, gas-filled cabinets, and center cabinets belong to the ring network cabinet, they are not called ring network cabinets. SF6 gas analysis of SF6 gas load break switch SF6 gas was discovered and used by people in the early twentieth century. SF6 gas is a colorless, odorless, non-toxic, non-flammable, chemically stable gas, and its density is 5 times that of air. SF6 gas molecules are negatively charged and have a strong ability to absorb free electrons to form negative ions, so they have extremely high electrical resistance and good insulation properties. Moreover, the SF6 gas of the load break switch has a low dissociation temperature and a low dissociation energy, so it has excellent arc extinguishing performance. SF6 has been widely used in the electric power industry because of its superior insulation performance and arc extinguishing performance. Working principles of SF6 gas load break switch The performance of the high-voltage ring main unit depends on the performance of the SF6 gas load break switch, so the sf6 gas load disconnect switch is the most important part of the ring main unit. SF6 load break switch is divided into three stations and two stations, the difference lies in whether there is a grounding switch. The sf6 gas load disconnect switch is an integrated switch of load switch, isolating switch and grounding switch, which is installed in a closed SF6 gas box. The shell is made of epoxy resin, which has heat-resistant insulation properties and is also a common material in the power industry. Therefore, the sf6 gas load circuit breaker has good insulation and arc extinguishing performance, and can be used for more than 20 years under normal maintenance. The load switch is switchgear with a simple arc extinguishing device. Load switches that use SF6 gas as insulation and arc extinguishing medium are called load break switch SF6. The SF6 gas load break switch can be used for the closing and breaking of load current and overload current, as well as the closing and breaking of no-load circuits, no-load transformers and capacitor banks. All three-position load switches with connection, disconnection and grounding functions have the characteristics of simple structure and low price. To buy a load disconnect switch, look for Gopower. Gopower is worthy of your trust! 11kv Lbs And 15kv Pole Mounted Disconnect Switch Gopower has many types of medium voltages LBS load break switch, in which 11kv load break switch and 15kv load break switch are very popular in our board and overseas customer, welcome to get enquiry now!

#sf6 #gas #load #break #switch

Working Principle Circuit breaker, also known as air switch, automatic circuit recloser. When the working current exceeds the rated current or short circuit and voltage loss occurs, the auto circuit recloser circuit will be automatically cut off. Compared with other circuit breakers, VCB vacuum circuit breakers are only different in arc extinguishing medium. There is no conductive medium in a vacuum, which makes the arc extinguish quickly, so the distance between the moving and stationary contacts of the circuit breaker is very small. The VCB breaker uses the plasma to rapidly diffuse and extinguish the arc when the current in high vacuum flows through the zero point, so according to VCB working principle, as to complete the purpose of cutting off the current. Inquiry China vacuum circuit breaker price from auto recloser manufacturer. Advantages and Disadvantages of Vacuum Vircuit Breaker Advantages of VCB pole mounted auto recloser 1. The arc of VCB circuit breaker is extinguished in the sealed container, and the arc and hot gas are not exposed; 2. The contact gap is very small, only a few mm to 40 mm. 3. Short arcing time, low arcing voltage, small arcing energy, less contact wear and more allowable breaking times. We have 11kv VCB breaker and 24kv vacuum circuit breaker. 4. The inertia of the moving conducting pole is small and suitable for frequent operation; 5. Simple structure, small volume and light weight; 6. Low noise during operation; 7. There is no oil, so there is no danger of fire and explosion; 8. The contact part is completely sealed, so it is not easy to reduce the performance due to the influence of moisture, dust, harmful gas, etc. the breaking and closing performance is stable, the contact wear is small, and the service life is long. Disadvantages of VCB vacuum circuit breakers 1. It is easy to produce switching overvoltage. When the inductive current is cut off, the current will be cut off, resulting in higher overvoltage. Therefore, an overvoltage absorption device should be installed. 2. It is difficult to monitor the vacuum degree during operation; 3. The composite insulator is easy to accumulates dust in the operation of a thermal power plant, so the environment of the auxiliary power room should be relatively clean.

#vcb #breaker #working #principle

ZW32 series vacuum circuit recloser, produced by Gopower pole mounted auto recloser manufacturer, is used in distribution systems. Pole mounted auto reclosers are used to make and break normal and fault currents. VCB pole mounted auto reclosers are fully equipped with sensors and a controller to provide protection and control. In case of a line fault, automatic vacuum circuit recloser can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. As a auto recloser manufacturer, we manufacture, design, and test the pole mounted auto recloser based on current standards IEC 62271-100. Gopower, which is the standard for China VCB circuit breaker manufacturer to produce qualified vacuum circuit reclosers and offer satisfying services for the customers. If you want to buy an automatic recloser circuit breaker, please contact us, because our electrical recloser circuit breaker price is competitive in the recent market. Types of Pole Mounted Auto Recloser Outdoor auto recloser circuit breaker is an indoor power distribution 3 phase recloser in 11kv, 24kv, 33kv, normal 24kv vacuum circuit breaker can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. The outdoor automatic recloser circuit breaker is especially suitable for places requiring no oil, less maintenance and frequent operation. The vacuum type recloser circuit breaker as pole mounted disconnect switch can be configured in central cabinet, double-layer cabinet and fixed cabinet as control and protection of high-voltage electrical equipment. As an electric power equipment company, we can offer types of VCB auto recloser circuit breakers, such as 11kv auto reclosers, 33kv automatic circuit recloser, etc. dvantages of VCB Vacuum Circuit Recloser Pole mounted auto recloser is named because its arc extinguishing medium and insulating medium of contact gap after arc extinguishing is high vacuum. Pole mounted recloser has the advantages of small volume, lightweight, suitable for frequent operation and arc extinguishing without maintenance. Vacuum type circuit breaker is widely used in a distribution network. Pole Mounted Auto Recloser Manufacturer Working Principle High power recloser, referred to as recloser pole, is a high-voltage switchgear with its own control and protection functions. Automatic circuit recloser can automatically detect the current passing through the main circuit of the recloser, automatically disconnect the fault current according to the inverse time limit protection in case of fault, and reclose multiple times according to the predetermined delay and sequence.

#33kv #automatic #circuit #recloser

As one of the top SCADA RTU manufacturers,Remote terminal unit scada is a general term for various remote monitoring installed in the distribution network, SCADA remote terminal units has functions such as data collection, control, and communication. BD-163 distribution automation master terminal unit in SCADA RTU is a new generation of China power distribution box based on the latest generation of automated remote terminal technology from China SCADA RTU manufacturers. The remote terminal unit RTU like our MCC cabinets electrical is the eyes and limbs of the power distribution automation system. The operating status of RTU in SCADA system is related to the data reliability, performance accuracy and operational safety of the power distribution automation. When the configuration is correct and the operation is normal, the SCADA RTU system realizes the correct operation of switches, rapid fault isolation and power restoration, thereby improving power supply reliability. Features of Remote Terminal Unit SCADA Remote terminal unit rtu With "communication", the SCADA RTU system has a "remote maintenance" function. Flexible configuration, all protection functions have a separate retreat. The RTU for SCADA system has a complete self-checking function to detect the working conditions of each part online. The closing and closing circuit adopts an anti-misoperation design and has an anti-missing function. Applicable to analog acquisition, state quantity acquisition, local and remote control switch closing of 4-12 switch. 24 channels can be controlled by expansion. By selecting different configurations, remote terminal unit can meet the needs of “Three Remote” and “Two Remote” of the State Grid and South Grid. Meet the special requirements of all parts of the country (such as Shandong, Beijing, Guangdong, etc.) Zero-sequence current setting adaptive function, no manual setting required. Meet the specific requirements of “one or two integration". The core RTU unit can be flexibly configured to shade vertical, shaded horizontal, outdoor vertical, an d group screen. Function of RTU in SCADA System Distribution Terminal Unit-DTU installation location: indoor and outdoor opening and closing station, power distribution room, knife lock chamber, box change, switch, it can detect line fault and overload status function, and can detect line zero sequence overvoltage, zero sequence overcurrent, line overload, line overcurrent, phase-to-phase short circuit protection, etc. At Zhgopower scada rtu manufacturers, It can be flexibly set to alarm and trip action. And record the fault event. The main functions of the scada remote terminal unit system are RTU unit realize comprehensive coverage and monitoring of the operating conditions of power distribution terminals, and quickly retrieve and locate each terminal through the terminal list column; RTU in SCADA RTU system realize remote monitoring of distribution terminal channel working conditions and board status, and timely alert terminal equipment defect information through the event warning window; Remote terminal unit in SCADA realize the remote query of the fixed value setting of the SCADA in electrical power system, the content of the information table and the program version, and complete the program upgrade, the fixed value placement, and the modification of the information table remotely through the remote setting bar; RTU for SCADA realize the remote query and download of the information in the memory of the power distribution terminal, such as remote signal displacement, over-current alarm, remote control operation record and other local information. What is RTU in SCADA Different from the and feeder remote terminal unit, the remote operation and maintenance system of the remote terminal unit in SCADA, Remote terminal unit RTU is composed of a communication management server, a Web server, network security protection equipment, and a maintenance workstation: the communication management server is used to provide direct communication with remote terminals and collect status information and parameter information of each SCADA remote terminal unit. At Zhgopower scada rtu manufacturers, The data gathered by remote terminal unit in SCADA is forwarded to the web server according to the data requested by the web server, and the remote terminal unit SCADA parameter setting command issued by the webserver is forwarded to the terminal; the web data server is used to provide a high-performance network service to provide users with browsing and modifying remote terminal unit RTU parameters and status. The interface also displays terminal real-time letter and wish data, and realizes various functions of human-computer interaction. Remote Terminal Unit vs PLC RTU is the basic unit of SCADA system, which is an electronic device installed on a remote site to monitor, measure and collect sensors and equipment installed on a remote site. PLC is a programmable logic controller, which performs data collection and instruction processing in the field station. Compared with the PLC, there are three main advantages: Feeder remote terminal unit RTU is generally not restricted by the geographical environment and can be installed near the outdoor on-site measurement point. Since SCADA RTU is not restricted by the working environment, its technical specifications are required to meet harsh environment requirements and specific requirements. Its data storage capacity is large, the analog quantity acquisition ability is strong (up to 24 channels), and the analog function is far more powerful than PLC. The RTU SCADA communication function is powerful. It will finally transmit the collected analog, switch, and digital information to the dispatch center, and the dispatch center is sometimes thousands of miles away, it is required to have a remote communication function. Although PLC also has a communication function, it is limited to the short-distance transmission of data within the plant station, and its communication function is slightly inferior to that of RTU.

#master #terminal #unit #in #scada

The pole mounted disconnect switch is a kind of safety switch used on the electric pole to ensure the safety of electricity. Pole top switch's main function is to isolate the high voltage of the circuit. According to the arcing capacity of the contact, Gopower pole mounted switch can be divided into pole top recloser & load brake switch. Besides, SF6 gas load break switch(SF6 LBS) including load break switch 11kv and 15 kv pole mounted disconnect switch,24kv and 33kv LBS. Types of Pole Top Switches There are many types of load break disconnect pole top switch, including SF6 Gas Load Break Switch and Vacuum Circuit Breaker. We offer different specifications of SF6 Gas Load Break Switch, such as 11kv load break switch, 15kv load break switch, 33kv load break switch, etc. Vacuum Circuit Breakers also have various specifications, including 11kv outdoor circuit breaker, 24kv vacuum circuit breaker, 33kv automatic circuit recloser and so on. If you want to buy pole top switches, please send your demands to us. How Does a Load Break Switch Work Load switch is a kind of pole top switches with a simple arc extinguishing device. The outdoor pole mounted load break switch uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load break switch. It can be used for closing and breaking load current and overload current, or as for closing and breaking no-load circuits, no-load transformers and capacitor banks, all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price. The pole mounted disconnect switch is actually a very useful power electrical equipment type. When the switch is closed, it can carry the relevant working currently and short-circuit current on the transportation circuit and protect the safety; When it is in the opening state, it will have a good insulation function, and a relatively obvious relevant port made of insulating material will be formed between the separated contacts. In general, as long as the pole mounted switch is installed, it will not cut off the load current and short-circuit current at will. What's more, the relevant parts of the switch can be used to set other fractures, such as setting for the line, and the port for managing the circuit fracture can be opened and closed at the same time. Therefore, they can meet the needs of circuit maintenance or reorganization in different states.

#33kv #load #break #switch

The distributed DTU power distribution terminal is suitable for the protection, measurement and control, and communication of the interval unit of the ring network cabinet with a voltage level of 10kV and below. Equipped with complete protection, measurement, control and communication monitoring functions, the mcc main control cabinets electrical cooperates with circuit breakers, load switches and other switches to provide protection for lines and feeder lines of 10kV and below, using complete protection functions to quickly isolate and isolate fault areas and reduce power outages Range, rapid restoration of power supply, and a strong guarantee for the safe and stable operation of the distribution network system. Features of Distribution Automation Terminal Distributed structure, it composed by several interval units and public units. The software platform adopts the powerful Linux operating system of real-time multi-tasking and multi-threading. The rtu remote terminal unit can record the first 4 cycles of the faulty line and 8 cycles after the failure during the fault recording of the device, and record 64 points for each cycle. Use the device maintenance tool to perform detailed analysis on the recording files, and the waveform details can be seen at a glance. Miniaturization, each unit of the terminal adopts a small structure, and the structure is small and convenient for mass production and mass testing The installation is simplified, and the terminal adopts a unified and easy-to-plug interface, suitable for installation and replacement Large size LCD screen with 160*160 resolution, terminal operating conditions can be seen at a glance It has a variety of communication interfaces and a variety of standard communication protocols. In addition to the internal data management function, it can also forward the data of electricity meters, PLC and DC screen in the distribution room or on and off station, and complete the data transmission and other functions by communicating with the master station system through a standard unified interface Main Purpose of Distribution Automation Terminal Installed in conventional switching stations (stations), outdoor small switching stations, ring main unit, small substations, box-type substations, etc., to complete the position signal, voltage, current, active power, reactive power, and collection and calculation of electric energy and other data, etc., to perform opening and closing operations on the switch, to realize the fault identification and isolation of the feeder switch and the restoration of power supply to the non-fault section. Report the processing process and results to the main distribution automation station. Advantages of Distribution Automation Terminal Use miniaturized distributed DTU to transform the existing ring main unit, which greatly saves installation space and solves the problems of large installation volume, complicated wiring, and long power outage time and so on. It does not depend on the global information of the master station or the sub-station Fast processing and reliable action When the operation mode of the distribution line changes, the logic is adaptive. No need to reclose multiple times, reducing the impact on the equipment.

#mcc #electrical #cabinets

11KV Vacuum Circuit Breaker

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

ZW32 series Breakers are used in distribution systems. Circuit breakers are used to make and break normal and fault currents. Breakers are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. The manufacture, design, and testing of the vacuum recloser is based on current standards IEC 62271-100.

Application of 11KV Vacuum Circuit Breaker

The vacuum circuit breaker is equipped with one integrated current transformer per pole. The current transformer has a ratio of 600 A:5 A. It is for protection purposes and optimized for operation with the controller.

Technical parameters of 11KV Vacuum Circuit Breaker

Products Type

ZW32-12

Maximum System Voltage

12kV

Rated Continuous Current

630A

Rated Frequency

50/60Hz

Short Time Withstand Current

20kA/1sec

Mainly Active Load Current

630A

Number of Load-break Operations

Short-circuit Making Current (peak)

50kA

Number of Making Operations

5 times

Cable Charging Current

25A

Line Charging Current

1.5A

Closed Loop Circuit Current

630A

Transformer Magnetizing Current

22A

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters

45kV

DryCondition-1min，Ph- Ph, Phase to Earth

42kV

Dry Condition - 1 min AcrossInterrupter

48kV

Phase to Phase, Phase to Earth

75kV

Across Interrupter

85kV

Internal Arc Test

20kA /0.1 sec

Arc Extinction Medium

vacuum

Insulation Medium

vacuum

Creepage Distance (Silicon)

780mm

Dry arcing distance

≥200mm

IP Level

Closing/Opening Time

＜1sec

Mechanical Operations (Guaranteed)

10000times

Operating Temperature (*Manual Type)

-25～+70℃

#11 #kv #breaker

11KV SF6 Gas Load Break Switch

https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/

The FWX1-12/630 outdoor SF6 load break switch is suitable for the distribution network with the highest voltage 11kV, the rated current 630A, and the rated frequency 50/60Hz, which can break off and close the load current and overload current in the power system. The load switch is equipped with an intelligent controller to realize the automation of the distribution system.

Features of 12KV SF6 Gas Load Break Switch

The operating mechanism with spring energy storage ensures fast closing and switching operation (<1000ms).

Operator place: Local/Remote.

Equipped with an electronic controller, it can be operated locally or with FTU/RTU interface for console operation.

Specification of 11KV SF6 Gas Load Break Switch

Parameter Name

Unit

Technical Requirement

Rated Maximum Voltage

Rated continuous Current

630

Short Time Withstand Current

Short-circuit Making Current (peak)

Power Operating Time (Close/Open)

sec

Mechanical Operations

times

3000

Rated full load operations

times

400

Breaking Capacity

Main Active (0.7pf)

630

Cable charging

Transformer magnetizing

Lightning Impulse Withstand Level

Phase to Earth

Across interrupter

Power Frequency withstand voltage

Phase to Earth

Across interrupter

Other Ratings & Specifications

Creepage Distance (Silicon)

830

IP Level

Arc Extinction Medium

SF6 Gas

Insulation Medium

SF6 Gas

Leakage Rate

cc/ sec

≤0.5%

Product size (max)

Width

mm/in

1368/54

Height

mm/in

530/21

Environmental Conditions for Equipment Use

Environmental conditions for equipment use

2.1 height above sea level：≤3000m

2.2 Air temperature： -40℃～+50℃

Maximum diurnal temperature difference：≤25℃

2.3 Relative humidity：Daily mean95% monthly average90%

2.4 Maximum wind speed：≤34m/ｓ

2.5 Earthquake intensity：＜8 degree

2.6 Icing thickness: ＜10mm

2.7 Thickness of snow: ＜35mm

2.8 irradiance: ＜0.1W/cm2

2.9 Pollution grade: Ⅲ class, Ⅳ class Ⅲ, Ⅳ

2.10 Installation site: No fire disaster, explosion danger, chemical corrosion, and frequent strenuous vibration places

Working Procedure of 11KV SF6 Gas Load Break Switch

The load switch that uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load switch. It can be used to switch and switch load current and overload current, and it can also be used to switch and switch no-load circuits, no-load transformers, and capacitors. Groups, etc., all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price. But the load switch cannot disconnect the short-circuit current.

Intended Use of 11KV SF6 Gas Load Break Switch

The SF6 load switch is an excellent load switch that many users have experienced in recent years. In addition to its long electrical life and strong braking force, it has the same advantages as the vacuum load switch. Its outstanding advantage is that it is easy to achieve three working positions (connected, disconnection and grounding), small current (inductance, capacitance) breaking, strong resistance to severe environmental conditions. It is suitable for popularization and application in urban and rural medium voltage distribution networks.

#11kv #lbs

Electric Power Equipment & Supplies

https://www.zhgopower.com/products/

lectrical Equipment & Supplies: Directly related to the production of electrical energy and transmission and distribution equipment called primary equipment, such as load break switch, circuit breaker. The auxiliary equipment that monitors, measures, controls and protects the primary equipment is the secondary equipment, such as feeder terminal unit, distribution terminal unit, and so on.

Types of Electrical Equipment & Supplies

Pole Mounted Switch

A kind of safety switch to ensure the safety of electricity consumption is mainly used to isolate the high voltage of the circuit, which can be divided into Load Break Switch and Vacuum Circuit Breaker according to the arc extinguishing ability of the contact.

Power Distribution Equipment

The power distribution is the last stage of power transmission; It transfers electricity from the transmission system to individual users The main distribution line delivers this medium voltage power to the distribution transformer located near the customer's premises.

Advantages of Electrical Equipment & Supplies



High-Precision

The products adopts special analog measurement protection algorithm, so that the system can calculate the most accurate line fault current, improve the accuracy of system protection, ensure the selectivity of system protection, protection precision can reach 0.5%.

High Quality

The products adopt the mechanical and electronic control parts of international brands; The opening type of intelligent control system, rigorous and scientific management system; With multi-effect simultaneously, to ensure the quality of equipment effectively.

Reliable

The products adopt an advanced design platform for dynamic simulation software, using advanced distributed technology and modular structure, open free communication protocol and other advanced technology, to achieve "reliable, steady, accurate, rapid”, makes the equipment well compatible with the protection of stability.

High-Efficient

The CPU of the device adopts ADI processor, and the processor adopts ARM Cortex-M4 dual-core design, supports Thumb-2 ISA technology, DSP and SIMD expansion, single cycle MAC and 3-stage pipeline, to making the system of the device more efficiency and respond faster.

#power #electrical #equipment

Vacuum Circuit Breaker

https://www.zhgopower.com/products/vacuum-circuit-breaker/

Application of Vacuum Circuit Breaker

ZW32-24/630-20 type circuit breaker is widely used in urban power grids or rural power grids as a section switch or contact switch, for outdoor substations of the rural power distribution system as an outlet switch, for 10kV system as a split and combined load current, overload current, and short circuit current protection.

#recloser #cost

Remote Terminal Unit-RTU

https://www.zhgopower.com/products/remote-terminal-unit-rtu/.

BD-163 distribution automation remote terminal (hereinafter referred to as the distribution terminal) is a new generation of power distribution terminal based on the latest generation of automated remote terminal technology.

Application of Remote Terminal Unit-RTU

Distribution Terminal Unit-DTU installation location: indoor and outdoor opening and closing station, power distribution room, knife lock chamber, box change, switch，it can detect line fault and overload status function, and can detect line zero sequence overvoltage, zero sequence overcurrent, line overload, line overcurrent, phase-to-phase short circuit protection, etc. It can be flexibly set to alarm and trip action. And record the fault event.

#remote #terminal #unit

Power Distribution Equipment

https://www.zhgopower.com/products/power-distribution-equipment/

The intelligent distribution transformer terminal is a distribution automation measurement and control terminal applied to 10kV line distribution transformers. It has the functions of monitoring the low-voltage side load and frequency of the distribution transformer, collecting power, and controlling the switching of capacitors.

The intelligent distribution transformer terminal is a new type of terminal designed and developed by our company in response to the State Grid's comprehensive promotion of the "three types, two networks, world-class" strategic deployment. Low-voltage equipment, smart meters, and other equipment are connected to the intelligent distribution transformer terminal. After converging, intelligent distribution transformer terminals will be sent to the IoT platform. Smart distribution terminal is the basic terminal equipment for building a strong smart grid of ubiquitous power Internet of Things.

How does a power distribution equipment work?

Power Distribution Equipment has the functions of remote control, remote communication, remote adjustment, fault detection, and so on, and can communicate with remote distribution sub-stations, send the operation data of the distribution equipment to the distribution master station to realize remote monitoring, accept the control command of the distribution master station, control and adjust the intelligent terminal equipment, provide the distribution system operation and various parameters, namely the information needed for monitoring and control, to realize the functions of fault location, fault isolation and fast recovery of power supply in non-fault areas.

#distribution #electrical #box

Pole Mounted Switch

https://www.zhgopower.com/products/pole-mounted-switch/

The pole-mounted switch is a kind of safety switch used on the electric pole to ensure the safety of electricity. Its main function is to isolate the high voltage of the circuit. According to the arcing capacity of the contact, it can be divided into circuit breaker & load brake switch.

How does a pole mounted switch work?

Load switch is a kind of switch equipment with a simple arc extinguishing device. The load switch that uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load switch. It can be used for closing and breaking load current and overload current, or as for closing and breaking no-load circuits, no-load transformers and capacitor banks, all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price.

#sf6 #lbs

Distributed Type DTU

https://www.zhgopower.com/products/distribution-type-dtu.html

Features of Distribution Automation Terminal

Distributed structure, it composed by several interval units and public units.

The software platform adopts the powerful Linux operating system of real-time multi-tasking and multi-threading.

Record the first 4 cycles of the faulty line and 8 cycles after the failure during the fault recording of the device, and record 64 points for each cycle. Use the device maintenance tool to perform detailed analysis on the recording files, and the waveform details can be seen at a glance.

Miniaturization, each unit of the terminal adopts a small structure, and the structure is small and convenient for mass production and mass testing

The installation is simplified, and the terminal adopts a unified and easy-to-plug interface, suitable for installation and replacement

Large size LCD screen with 160*160 resolution, terminal operating conditions can be seen at a glance

It has a variety of communication interfaces and a variety of standard communication protocols. In addition to the internal data management function, it can also forward the data of electricity meters, PLC and DC screen in the distribution room or on and off station, and complete the data transmission and other functions by communicating with the master station system through a standard unified interface

Main Purpose of Distribution Automation Terminal

Installed in conventional switching stations (stations), outdoor small switching stations, ring main unit, small substations, box-type substations, etc., to complete the position signal, voltage, current, active power, reactive power, and collection and calculation of electric energy and other data, etc., to perform opening and closing operations on the switch, to realize the fault identification and isolation of the feeder switch and the restoration of power supply to the non-fault section. Report the processing process and results to the main distribution automation station.

Advantages of Distribution Automation Terminal

Use miniaturized distributed DTU to transform the existing ring main unit, which greatly saves installation space and solves the problems of large installation volume, complicated wiring, and long power outage time and so on.

It does not depend on the global information of the master station or the sub-station

Fast processing and reliable action

When the operation mode of the distribution line changes, the logic is adaptive.

No need to reclose multiple times, reducing the impact on the equipment.

#mcc #cabinets #electrical

Control Box-Feeder Terminal Unit

https://www.zhgopower.com/products/control-box-feeder-terminal-unit.html

The feeder terminal unit(FTU) is a new HV switch control device equipped with both the imported DSP high-speed sampling chips and the high-performance ARM chips, and can fast and stably finish the monitoring on the switch. It boasts of such functions as the protection, measuring, controlling, monitoring, communication, remote control, and so on and features high integration level, flexible configuration, and user-friendly interface, widely applied to the radiant and ring network power supply systems to help the systems identify transient and permanent line faults, eliminate the impact of transient line faults automatically, isolate the permanent fault segments to avoid prolonged power failure in a large area, and automatically recover the power supply in fault-free areas, so as to realize the automation of power distribution network in an economical and practical way.

Key functions of Control Box

S/N

Functions

Remarks

Three section protection

Each protection can be vote back independently

Over-current count protection

Failure time count, output after meeting the number of

times, output mode is optional

Zero-sequence protection

Output options: exit, alarm and tripping

Pre - voltage fault protection

Protection can be accelerated when combined at fault

point

Post-reclosing acceleration

Vote back independently

Constant time-lag

The protection time is fixed

Inverse time limit

Multiple protection curves optional

Ring network protection

Hardware needs to configure double PT

Event Log

The recording time is exactly millisecond

10.

Status enquiry

The main content is remote control and remote

metering

11.

Remote programmable

Remote input support programmable

Communication protocols of Control Box

S/N

Protocols

Remarks

IEC60870-5-101 balanced

IEC60870-5-101 unbalanced

IEC60870-5-104

DNP3.0

Now support level 3

Modbus

Technical Parameters of Control Box

No.

Items

Rated value

Remarks

Operating ambient temperature

-40 ~ +85℃

Environmental relative humidity

10 ~ 100%

Maximum absolute humidity

35g/m3

Atmospheric pressure

66~ 108kPa

Working voltage

AC220V±20%

Working voltage frequency

50HZ±5HZ

Power consumption

≤15W

Protective exit time

<35ms

Protect inherent action time at 1.5 times fixed value

Insulation impedance

>100MΩ/ DC500V

1.External terminal to ground

2.Power circuit to ground

3.On-off input circuit to ground

4.Output circuit to ground

5.AC circuit to ground

6.AC circuit and power circuit

7.Between on-off input circuit and output circuit

10.

Power frequency withstand voltage

Power circuit to ground

500

On-off input circuit to ground

500

Output circuit to ground

AC circuit to ground

AC circuit and power circuit

1500

Between on-off input circuit and output circuit

11.

Impulse withstand voltage

Power circuit to ground

On-off input circuit to ground

Output circuit to ground

AC circuit to ground

AC circuit and power circuit

Between on-off input circuit and output circuit

#feeder #terminal

Trending Blogs

Recently Viewed Blogs

Gopower