XL-21 low-voltage power distribution cabinet
Overview
XL-21 Low Voltage Switch Cabinet is suitable for power plant, industry and mining enterprises. It is used for power distribution in three-phase four-wire or three-phase five-wire system with AC voltage of 500V or less. XL-21 low-voltage power distribution box is installed on the wall of the indoor device and repaired in front of the screen.
Structural characteristics
XL-21 Low Voltage Switch Cabinet product is closed, the shell is formed by bending steel plate, and the knife switch operating handle is located at the upper part of the right column in front of the box, which can be used for switching power supply. A voltmeter is installed in front of the distribution box to indicate the voltage of bus bar. There is a door in front of the distribution box. When the door is opened, all the equipment in the distribution box is exposed, which is convenient for maintenance. The distribution boxes adopt domestic self-designed components, which have the characteristics of compact structure, convenient maintenance and flexible combination of line schemes. low-voltage power distribution cabinet is equipped with air circuit breaker and fuse as short circuit protection. Contactors and thermal relays are also equipped. The front door of the box can be equipped with operation buttons and indicator lights.
I. Use
AC gapless metal oxide arrester (hereinafter referred to as arrester) is used to protect AC electrical equipment of corresponding voltage level from lightning overvoltage and operating overvoltage damage.
Product Implementation Standard: GB11032 - 2010 "AC electrical equipment arrester".
II. Conditions of Use
1.It is suitable for indoor and outdoor use.
2.Ambient temperature (-40 +40) C;O
3.The maximum solar radiation intensity is 1.1kW/m.2
4.The altitude does not exceed 2000 m.
5.The rated frequency of AC system is (48-62) Hz.
6.The power frequency voltage applied between the arrester terminals for a long time should not exceed the continuous operating voltage of the arrester.
7Earthquake intensity 8 degrees and below;
8.The maximum wind speed does not exceed 35m/s.
III. Structure and Characteristics
This kind of arrester is assembled by superposition of non-linear zinc oxide resistors and sealed in high voltage insulating ceramic sleeve without any discharge gap.Under normal operating voltage, the arrester is insulated with high resistance; when it is impacted by overvoltage, the arrester is in low resistance state, releasing impulse current into the ground quickly, so that the voltage on the electrical equipment parallel to it is limited to the prescribed value, so as to ensure the safe operation of the electrical equipment.The arrester is equipped with a detachment device. When the arrester operates under overload or suffers accidental damage, the internal pressure increases sharply, so that the arrester can be detached from the device to ensure that the ceramic sleeve is not damaged.The arrester has the characteristics of good steep wave response, high shock current tolerance, low residual voltage, reliable operation, no power frequency continuous current, simple maintenance and so on.
power controlled GGD fixed switch cabinet is suitable for 50HZ AC, 380V rated working voltage and 3150A rated working current distribution system of power plant, power plant, mining enterprise and other power users. It is used for power conversion, distribution and control of power, lighting and distribution equipment.
GGD fixed switchgear is a new type of low-voltage distribution cabinet designed on the principle of safety, economy, reasonableness and reliability, according to the requirements of the superiors in charge of the Ministry of Energy, the vast number of power users and design departments. The product has the characteristics of high breaking ability, good dynamic and thermal stability, flexible electrical scheme, convenient combination, series, strong practicability, novel structure and high protection grade. It can be used as a replacement product of low-voltage switchgear.
Fixed switchgear meets IEC 439 "Low Voltage Switchgear and Control Equipment", GB7251 "Low Voltage Switchgear Set" and other standards.
Most load types in power system belong to inductive load. In addition, power electronic devices are widely used in power enterprises, so the power factor of power grid is low. Lower power factor reduces equipment utilization ratio, increases power supply investment, damages voltage quality, reduces equipment service life, and greatly increases line loss. In order to improve the energy waste caused by the low power factor of power grid and these unfavorable factors of power supply production, it is necessary to effectively improve the power factor of power grid. Obviously, it is unreasonable and usually impossible for these reactive power to be supplied by generators and transmitted over long distances. Reasonable way is to generate reactive power where reactive power is needed, that is, to increase reactive power compensation equipment and devices.
II. Structure Composition
Generally speaking, low price Capacitance Compensation Cabinet is composed of cabinet shell, bus, circuit breaker, disconnector, thermal relay, contactor, lightning arrester, capacitor, reactor, primary and secondary conductor, terminal row, power factor automatic compensation control device, panel instrument, etc.
III. Basic Principles
In the actual power system, most of the loads are asynchronous motors. The equivalent circuit can be regarded as a series circuit of resistance and inductance. The phase difference between voltage and current is large and the power factor is low. After shunt capacitors are connected, the current of capacitors will offset part of the inductance current, so that the inductance current decreases, the total current decreases, the phase difference between voltage and current decreases, and the power factor increases.
A reactive power automatic controller is installed in the compensation cabinet, which automatically puts in or removes capacitors according to the load force rate. The main function of the controller is to make the load close to the required reactive current, thereby improving the power factor. For enterprises, the main reason is to avoid the penalty of power factor not up to the standard (0.9).
WSD-ZW32-24D Outdoor AC high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is a rated voltage of 24 KV, 50 HZ three-phase AC outdoor distribution equipment.The utility model has the advantages of stable and reliable interruption performance, no danger of combustion and explosion, maintenance-free, small size, light weight and long service life.It is mainly used for breaking and closing the load current, overload current and short circuit current in power system.It is suitable for protection and control in power distribution systems of substations and industrial and mining enterprises, and more suitable for rural power grids and frequently operated places.
This product meets GB1984-2003 "High Voltage AC Circuit Breakers" and DL/T402-2007 "Technical Conditions for Order of High Voltage AC Circuit Breakers" and DL/T403-2000 "Technical Conditions for Order of 12 kV~40.5 kV High Voltage Vacuum Circuit Breakers" and other technical standards.
CHARACTERISTICS
1. The vacuum arc extinguishing chamber uses longitudinal magnetic field arc extinguishing technology, which has the characteristics of long electric life and high reliability.
2. The imported silicone rubber/epoxy resin for outdoor use and the present APG vacuum injection technology are adopted.
3. Anti-ultraviolet, moistureproof, anti-corrosion, with the advantages of preventing surface discharge, good hydrophobicity and high mechanical strength.
4. Using simple and reliable spring operating mechanism, it has the advantages of small size and light weight.
5. high voltage vacuum circuit breaker can be equipped with isolation switch and three-phase linkage. It has visible breaks when the isolation switch is switched off. It also has anti-mistake interlock between the isolation switch and the circuit breaker body. It can be equipped with arrester strut insulators.
Operational sequence
When operating the disconnector, the first step is to confirm that the circuit breaker should be in the open state. Use the insulated tie rod hook to fasten the closing pull ring or the opening pull ring of the operating handle of the isolation closure, pull down slightly, drive the spindle to rotate, open or close the isolation switch. When the spindle rotates the dead point position of the compression spring, a certain tension is maintained so that the blade can be reliably closed or opened to a safe isolation position.
WSD-FLW34-24 SF6 load switch
WSD-FLW34-24 SF6 load switch is suitable for outdoor three-phase AC distribution system with rated voltage of 24 kV and rated frequency of 50/60 HZ.
Overview
WSD-FLW34-24 SF6 load switch is suitable for outdoor three-phase AC distribution system with rated voltage of 24 kV and rated frequency of 50/60 HZ. It can be used for on-off and off-load currents and short-circuit currents. The products are suitable for substation, industrial and mining enterprises, protection and control of farm network, automatic distribution network of farm network and frequent operation places.
WSD-FLW34-24 SF6 load switch is used for operation control switch of overhead line distribution system. There are many types. It has many outstanding advantages, such as no oil, simple mechanism, reliable performance and no maintenance, and has been widely used so far. This High Voltage Switch Cabinets with FDR type fault detector or RTU remote control terminal device to form a very simple distribution automation system, which can realize automatic fault location of overhead lines and automatic isolation of fault sections.
Xl-21 series power distribution box is suitable for power distribution and lighting distribution in industrial and civil buildings with AC frequency of 50 Hz, voltage of 500 V and below, three-phase four wire power system. At the same time, it is suitable for making all kinds of motor starting cabinets, including full voltage direct starting cabinet, full digital control soft starting cabinet, self coupling step-down starting cabinet, star delta starting cabinet, multi speed motor starting cabinet, etc. There are dozens of primary line scheme numbers or derived scheme numbers for selection, which have a wide range of applications.
This product is an indoor enclosed distribution box. The box body is made of thin steel plate by bending and welding. The front of the box body is a single left door. The door is equipped with voltmeter, ammeter and other measuring instruments, operating appliances and signal appliances. It is a power distribution device with simple structure, reliable operation and low cost.
Characteristics
1. The main electrical performance fully conforms to iec60439-1 and gb7251.1.
2. The auxiliary circuit has local, remote and automatic control switching function, and the contactor can adopt direct protection.
3. The outlet switch adopts a new type of molded case short circuit and compound release with small volume, high breaking and short (or no) flashover. It has overload and short-circuit protection function, and can install leakage protection function according to user's requirements.
4. The motor circuit has the functions of overload, short circuit, undervoltage and phase loss protection.
5. The product meets the protection level of IP42, and can be used as outdoor power, safe and reliable.
Axial fan heater is a kind of intelligent switch cabinet equipment, if you want to buy high quality heater, you can choose us! Our company is a leader in the industry and we will not disappoint you.
Buy low price, high quality lightning arrester, outdoor lightning arrester, ac gapless metal oxide arrester . You can choose our products. Our company is the leading factory. Warmly welcome new and old customers to visit and patronize!
1. Use
(H) RW 12-27 drop fuse and pull-load drop fuse are outdoor high-voltage protective appliances, which are assembled on the high-voltage side of distribution transformer or branch lines of distribution line, and are used for overload and short-circuit protection of transmission lines and power transformers and for sharing rated load current.
2. Brief introduction of structure
The drop fuse consists of two parts: insulating bracket and fuse pipe. The static contacts are installed at both ends of the insulating bracket, and the movable contacts are installed at both ends of the fuse pipe. The fuse pipe consists of an inner arc extinguishing tube and an outer epoxy glass tube. Pull-load drop fuse adds elastic auxiliary head and arc extinguishing cover to divide and close load current. When a drop fuse is in normal operation, the fuse pipe is tensioned by means of the fuse.
Then a closed position is formed. When the system fails, the fault current causes the fuse to fuse rapidly and form an arc. The arc extinguishing tube is heated by the arc and decomposes a large number of gases, which forms a high pressure in the tube and blows longitudinally along the pipeline. The arc is rapidly elongated and extinguished. After the fuse is fused, the lower moving contact loses tension and turns down. The locking mechanism releases the fuse tube, and the fuse tube falls down, forming an obvious breaking position. When the load needs to be pulled, the contact is pulled by the insulating rod. At this time, the active and static contacts are still in contact. The contacts are pulled by the insulating rod, and the auxiliary contacts are separated. Arc is generated between the auxiliary contacts. The arc is elongated in the slot of the arc extinguishing hood. At the same time, the arc is extinguished when the current passes zero.
3. Implementation criteria
The product performance conforms to GB15166.3-94 national standard and IEC282-2 international standard.
4. Conditions of Use
1. Environmental temperature: - 40 ~40 C;
2. No more than 1200 m above sea level;
3. The wind speed is not more than 35m/s.
4. Earthquake intensity does not exceed 8 degrees.
5. Fuses are not suitable for the following places:
A. Places where there is a danger of combustion or explosion;
B. Places with violent vibration or shock;
C. Areas with heteroelectrochemical gases, severe air pollution and salt fog.
5. Instructions for Order
1. Product type, name, rated voltage, rated current and rated switching-on current;
2. Environmental requirements (anti-pollution, plateau type);
3. Special requirements can be consulted with our company.
Manufacturer of intelligent switch cabinet--low-voltage, high voltage power distribution switch cabinet, also have many other electric equipment electric power accessories, intelligent transmission and distribution automation system
WSD-GZTW-2 is a communication power supply designed for different capacity users. The system configuration consists of monitoring module, communication power module, AC/DC monitoring module, insulation monitoring module, battery patrol module, switch monitoring module, distribution unit, storage battery and cabinet body
â? .Direct Current Panel
WSD-GZTW-2 Microcomputer Controlled Communication Power Supply Screen is a communication power supply designed for different capacity users. The system configuration consists of monitoring module, communication power module, AC/DC monitoring module, insulation monitoring module, battery patrol module, switch monitoring module, distribution unit, storage battery and cabinet body. It has the characteristics of simple operation, intelligent management, high
â?¡.System characteristics
1) Automatic switching of two AC inputs to ensure the normal operation of the system;
2) Wide range of input voltage and strong adaptability of power grid;
3) HZ-JK02T monitor, LCD display, Chinese menu, friendly and rich interface, simple and convenient key operation;
4) It has comprehensive system setup, operation information query and various alarm functions.
5) Intelligent battery charge and discharge management, perfect and reliable temperature compensation function;
6) The rectifier module adopts electrified hot plug-and-pull, which makes daily maintenance convenient and fast.
7) High precision dynamic current sharing, which can operate independently, principally or under control.
8) Extensible battery detection 2 groups 110 knots, insulation detection 240 routes, switch detection 160 routes, compatible with inverter power module, DC conversion module;
9) The system adopts multi-level password authority management to restrict the operation of unauthorized personnel and ensure the safe and reliable operation of the system.
10) Built-in RS232, RS485 two communication interfaces, through the background monitoring and operation monitoring system to implement the "telemetry, remote control, remote communication, remote adjustment" four remote functions, to achieve unattended;
11) Support RTU, CDT, MODBUS three communication protocols.
(1) Signal devices can be added according to user's needs to realize the alarm function of accident signal and warning signal.
(2) The different functions of the configuration will be different. See the function description of the module selected by the Department for details.
I. Summarization
KYN28A-24 indoor AC metal armoured pull-out switch cabinet is suitable for three-phase AC 50/60Hz power system, for receiving and distributing power, and for controlling, protecting and testing the circuit. APG epoxy casting and reliable solid insulated bus technology are used in the interior of the product for full insulation design. It has good electric field distribution measures. It is a miniaturized switchgear with advanced technology, stable performance, reasonable structure, convenient use, safety and reliability.
â?¡.CHARACTERISTICS of China High Voltage Switch Cabinet
1. Bus bar adopts thermal shrinkable insulating material or epoxy coated insulation method to optimize the shape of the electrode, make the cabinet structure compact and reduce the occupied area.
2. The High Voltage Switch Cabinet body is made of high-quality cold-bonded steel plate and imported aluminium-zinc coated sheet metal, which are processed by NC sheet metal and connected by high-strength bolts, nuts and rivet nuts.
3. The switchgear equipment has other primary schemes such as cable in-out line, overhead in-out line, bus connection, isolation, voltage transformer, lightning arrester and so on.
4. Insulation boards are installed in bus cabinet, handcart cabinet and cable cabinet, which greatly improves the insulation level.
5. The interlock between main LOAD SWITCH, handcart, ground knife switch and cabinet door adopts mandatory mechanical door lock mode to meet the "five-proof" function.
6. Friendly man-machine interface makes switchgear operation programmable and formulaic, and the operator can see it at a glance.
7. The main wiring scheme can reach more than 160 kinds, and has strong structural adaptability, which can meet the needs of different users.
KYN28A-12 indoor AC metal armoured pull-out switch cabinet is suitable for three-phase AC 50/60Hz power system, for receiving and distributing power, and for controlling, protecting and testing the circuit. APG epoxy casting and reliable solid insulated bus technology are used in the interior of the product for full insulation design. It has good electric field distribution measures. It is a miniaturized switchgear with advanced technology, stable performance, reasonable structure, convenient use, safety and reliability.
The switchgear meets IEC298, GB3906-91. In addition to be used with domestic VS1 vacuum circuit breaker, it can be used with VD4 from ABB, 3AH5 from Siemens domestic ZN65A, and VB2 from GE, etc. It is truly a power distribution deviece with good performance.
In order to meet the requirement for wall mounting and front-end maintenance, the switchgear is equipped with a special current transformer, so that the operator can maintain and inspect it in front of the cubicle.
CHARACTERISTICS
1. Bus bar adopts thermal shrinkable insulating material or epoxy coated insulation method to optimize the shape of the electrode, make the cabinet structure compact and reduce the occupied area.
2. The cabinet body is made of high-quality cold-bonded steel plate and imported aluminium-zinc coated sheet metal, which are processed by NC sheet metal and connected by high-strength bolts, nuts and rivet nuts.
3. The switchgear equipment has other primary schemes such as cable in-out line, overhead in-out line, bus connection, isolation, voltage transformer, lightning arrester and so on.
4. Insulation boards are installed in bus cabinet, handcart cabinet and cable cabinet, which greatly improves the insulation level.
5. The interlock between main switch, handcart, ground knife switch and cabinet door adopts mandatory mechanical door lock mode to meet the five-proof function.
6. Friendly man-machine interface makes switchgear operation programmable and formulaic, and the operator can see it at a glance.
7. The main wiring scheme can reach more than 160 kinds, and has strong structural adaptability, which can meet the needs of different users.
WSD-VZF(R) -27/630-25 removable vacuum load switch + fuse combination electrical appliances (hereinafter referred to as combination electrical appliances) is a new generation of three-phase AC 50Hz, rated voltage 27kV indoor switchgear developed according to unique design concept and market demand. It is widely used in indoor armoured air insulated switchgear. It meets the requirements of GB3804-2004, GB16926-1997 and other standards. Under normal operating conditions, as long as the technical parameters of the vacuum switch are within the range, it can ensure the safe and reliable operation of the corresponding voltage level of the power grid.
Environmental Conditions for Use
The ambient temperature should not be higher than + 40, not lower than 10Â (storage and transportation allowed at 30)
Elevation does not exceed 1500m.
Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90%, the daily average of saturated vapor pressure is not more than 2.2 x 10-3 Mpa, and the monthly average is not more than 1.8 x 10-3 Mpa.
Earthquake intensity does not exceed 8 degrees.
No fire, explosion danger, serious pollution, chemical corrosion and violent vibration.
Functional characteristics
1. The whole box body is divided into four parts: the bottom floor, the frame, the top frame and the box cover. The frame and the top frame are assembled by steel structural parts. The outer shell can be made of coloured steel plate which conforms to the heat insulation plate or steel plate. The clapboard is made of coloured steel composite plate to prevent thermal radiation and thermal guidance between different types. The exposed structural parts are treated by strict acid washing, phosphating, spraying and other processes to ensure corrosion resistance, moisture and heat resistance, mildew resistance and strong outdoor weather resistance.
2. The sub-box structure is adopted to avoid oil pollution in transformer tank.
3. Adopt new louver structure, large area of heat dissipation and ventilation, suitable for areas with strong wind. V-shaped structure design can effectively prevent rainwater from entering while enhancing ventilation.
4. Low-voltage main switch adopts circuit breakers from well-known manufacturers at home and abroad.
5. The transformer uses S11-M series fully sealed oil-immersed power transformer, which has the advantages of low loss, low noise and high efficiency. It can achieve good energy-saving effect and reduce pollution.
6. Substation has perfect protection performance, convenient operation, high and low voltage metering is optional, and can be equipped with automatic reactive power compensation device according to user's requirements.
I. Overview
PLC control cabinet is an electric cabinet with PLC as the core control unit, which can realize the control of fans, pumps, electric valves and other field equipment. According to the actual control scale, the automatic control of single cabinet can be realized, and the DCS control system can also be composed of multi cabinets through industrial Ethernet or industrial fieldbus network. It is widely used in electric power, metallurgy, chemical industry, paper making, environmental protection sewage treatment and other operations. It can realize remote assistant control, data acquisition, real-time data transmission, online data analysis, large data analysis and application, etc.
â?¡. Systematic Programmes and Characteristics
1. PLC + Relay Control System
Suitable for small-scale control system. The relay hardware circuit is mainly used to control the system, and the simple automation control is mainly realized. Principle: In manual mode, the user can control the field equipment manually according to the button instructions on the operation panel of the control door; in automatic mode, the small PLC can output the contact signal of the intermediate relay through the logical operation of the program according to the received control conditions, and drive the control unit of the equipment (such as the controlled motor) with this signal. AC contactor, electric control valve, solenoid valve, frequency converter, soft starter, etc., to achieve the purpose of control.
Advantages: Easy operation, low technical requirements for operators. The system runs safely and reliably, maintains conveniently and costs low.
WSD-JP outdoor integrated distribution device is a kind of outdoor integrated distribution device, which integrates measurement, outgoing line, reactive power compensation and other functions. It has the functions of short circuit, overload, overvoltage and leakage protection. It is small in size, beautiful in appearance, economical and practical. It is installed on poles of transformers on outdoor poles. It is a new generation of ideal distribution products for urban and rural power grid transformation.
Structural characteristics
1. The box structure is discrete and horizontal. The shell is bent by multi-folding process of 2mm high-quality stainless steel plate. The stainless steel double-layer composite plate with honeycomb structure has the properties of flame retardant, environmental protection, heat insulation and condensation proof.
2. The front and back door of the box body is opened to facilitate user operation and maintenance. Each door is equipped with two kinds of door locks, light and dark, and the metering room is fully enclosed with lead encapsulation device.
3. The bottom is punched with ventilation holes and cable outlet holes, and the top is equipped with ventilation ducts and wire mesh. It has the functions of waterproof, rust-proof, dust-proof and foreign body-proof. The protection grade IP43
Use of environmental conditions of waterproof outdoor integrated distribution box
1. Ambient temperature: -25 +40
2. Relative humidity of air: daily average is not more than 90%, monthly average is not more than 90%.
3. Altitude: not higher than 2000m
4. Installed in places without severe vibration and impact, and corrosive gases.
