Air circuit breaker Active energy meter

Electrical energy can be converted into a variety of energy. Such as: electric furnace is converted into thermal energy, by the motor into mechanical energy, is converted into light power transformers‍ by the lamp and the like. In these transformations in energy consumption for active energy. The record of this energy meter for active energy meter.

Reactive power meter

Electrical theory tells us that some electrical equipment for energy conversion when served to establish a transition environment, such as: motors, transformers, etc. must first establish a magnetic field in order to make energy conversion, and some electrical device is first made to establish an electric field energy conversion. The establishment of magnetic and electric power are required reactive energy. The record of this power meter for reactive energy meter. Reactive energy in the electrical device itself is not consume energy, but will produce reactive current in the electrical circuit, Air circuit breaker‍ the current will produce a certain loss in the line. Reactive power meter is specifically record this loss, usually only the larger power unit before the installation of such meters.

CNC Electric According to the principle of division

1. Meter and electronic sensors into two categories:

Principle of induction meter uses electromagnetic induction to the voltage, current, phase change magnetic moment, pushing aluminum disc rotation axis of the disc (worm) current transformer‍ drive gear drive counters and the drum rotates, the rotation of the process that is the amount of time cumulative process. Therefore, the benefits of induction meter is intuitive, dynamic continuous power does not lose data.

Induction meter high requirements on the process, involving a wide range of material, metal, plastics, precious stones, glass, rare earth and so on, to which the relevant material standard products and requirements are clearly defined, with cheap inferior materials instead of the standard specifications of materials is one of the main problems that affect product quality meter, so like most commodities, low commodity prices will not have a good quality assurance.

Complex production process induction meter, but already mature and stable, but also comprehensive support tooling equipment. Production requirements temperature, humidity and air purification degrees higher.

Electronic energy meter using analog or digital circuits to get the product of voltage and current vector, and then implement the energy measurement functions with analog or lectri calmete‍ digital circuits. Since the application of digital technology, sharing billing meter, prepaid energy meter, multi-user power meter, multifunction power meter have appeared, and further meet the science of electricity and reasonable demand for electricity.

Currently Overall, induction meter, compared with the electronic energy meter, induction meter quantity produced as much. But production of electronic power meters have a clear upward trend.

2. Press the accuracy of measuring the power of classification, there is a general and two tables: one represents meter error does not exceed ± 1%; 2 represents meter error does not exceed ± 2%

3. Press the additional function division, multiple rate meter, prepaid energy meter, energy meter multi-user, multi-function meter, power meter and other carriers. Multi-rate meter or meter, said sharing, multi-rate table, commonly known as peak table, is a measurement instruments in recent years to meet the needs of TOU tariff provided. It can be pre-peak, valley, usually divided into segments, each metering peak, trough, flat section of electricity, and thus different time with different electricity tariffs, tariff regulation play, encourage electricity customers adjust electricity load, peak load shifting, rational use of power resources to fully tap, supply, potential electrical equipment, is an electronic or electromechanical meter; commonly known as prepayment meter card table, with IC card pre-order power, the IC card is inserted in the table can be controlled by the cost of electricity to prevent electricity arrears, is electronic or electromechanical meter; power transformers‍ multi-user meter a watch for multiple users, independent accounting of each user, so you can reach the purpose of saving resources and easy to manage, but also conducive to the centralized remote automatic meter reading, is the electronic energy meter; multifunction meter set a number of functions in one, is the electronic energy meter; carrier Meter use power line carrier technology for centralized remote automatic meter reading, is the electronic energy meter.

mcb circuit breaker Meter, ic card meter, and other related products.

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  Technical Analysis

The current main program power industry electrical measuring instruments are generally based on semiconductor technology for accurate measurement purposes. Meter generally uses a high-precision A / D converter, the voltage and current signals grid sampling and analog-digital conversion, and Power Supply‍ high-speed digital signal microprocessor for analyzing, processing and data re-processing, sorting, resulting in a variety of measurement data; and finally using a variety of communication interfaces, human-machine interface with a variety of devices to achieve docking.

Meter is a sampling technology, micro-processing technology, design technology and experience combined with the product, is an interdisciplinary high-tech products. Meter manufacturers according to their own understanding and application of design techniques to achieve the function meter. The power meter products, now has a multi-function, networked, intelligent, digital needs, to meet the current requirements of all kinds of measurement, such as measurement of active and reactive power metering, demand computing, grid quality testing, grid event record and other complex functions, and can be used as communication and control from the master data exchange with the central station.

Currently, information collection system product technology is constantly evolving and upgrading process, product requirements and product functionality continuously optimized, mcb circuit breaker‍ increasing to meet the growing information management requirements. Technically mature product combines the current energy metering function, electromagnetic measurement technology, DSP data processing technology, industrial automation technology, wireless remote technology, low-voltage power line carrier communication technology, embedded real-time operating system software platform technologies; interdisciplinary high-tech systemic products are new products,

Meter industry is already mainstream products in the international stage of rapid development, is a sunrise industry, including the world's developed economies and developing countries during the replacement meter to adapt to changes in the current world situation. First, the global energy conservation requirements, the need for accurate measurement of energy, promote the consumption of electricity control subject were based on the change in energy, electricity consumption habits change; the second is to adapt to the power of modern management, information Cncelegroup‍ technology requirements, through smart meter as a node in the grid, you can quickly and efficiently in real-time to understand the situation of electricity power users, substations and other metrology measurement points, provide more accurate service and management.

Meter products in greatest demand are residents of single-phase energy meter, but with each year due to increased electricity consumption, electricity load increases residents, related electrical equipment requires the use of a three-phase power supply. While taking advantage of the three-phase power supply can improve load balancing rates and reduce electricity line losses. At present, most countries have adopted a three-phase residential electricity supply, the scope of application of the three-phase electronic energy meter has gradually expanded from the main field of industrial electricity to the residents of electricity. Therefore, the demand of three-phase power meter measurement will be increasing, accounting in the demand structure in the meter will be increased gradually.

To promote the smart grid construction, smart meter and information collection system will be an important part of the smart grid construction, electricity users to achieve "full coverage, full current transformer‍ collection, full fee control", will facilitate information collection system improve product technology.

mcb circuit breaker circuit breaker Daily note

1, to avoid violent vibration, corrosive gases and prevent fluid flow into and prevent under irrigation and dry and ventilated place, do not obstruct ventilation fabric cover.

2, please use the three-plug circuit breaker‍ (grounding) receptacle, grounding screw on the unit must be properly grounded, otherwise the cabinet with a pencil measure would have charged phenomenon, which is caused due to the distributed capacitance induction, is a normal phenomenon, through the ground wire eliminated. If the cabinet serious leakage, measure the insulation resistance is less than 2MΩ, may be an insulating layer is wet or shorted circuit and chassis, should identify the reasons for troubleshooting before use.

3, 0.5 ~ 1.5KVA small power regulator uses fuses for overcurrent circuit protection purposes, 2 ~ 40KVA regulator role DZ47 breaker for over-current, short circuit protection, as is often blown fuse or circuit breaker trips frequently, should check whether the electricity is too large.

4, when the output voltage exceeds the protection level (phase voltage protection value adjusted at the factory 250V ± 5V), power supply automatic protection, cut off the power current transformer‍ supply output voltage, over-voltage lights at the same time, the user should immediately check the grid voltage or shutdown Regulators such as the occurrence of automatic power regulator (with no input output), you should check the mains voltage is higher than 28OV. If less than 280V should check whether the regulator failure. The reason to be identified before use.

5, if the regulator output voltage 220V deviate more, please adjust the potentiometer on the control panel to the normal output voltage (input voltage reach the voltage range can not be adjusted).

6, when the mains voltage is often the input voltage limit (<150V) or upper limit (> 260V) at the regulator, the limit is often affected by micro-switch touch, control failure prone. Then the regulator or the regulator can not only increase (or reduce only), you should first check the micro switch is damaged.

7. Keep the machine clean and dust will hinder rotation of the gear, the impact of the output voltage accuracy. Please contact surfaces clean and maintain coil cleaning. Brush wear serious pressure should be adjusted in order to avoid the contact surface arcing brushes and coils. Brush length less than 2mm should be replaced. Application fine sandpaper to be flat lighting coil arcing burnt black.

Picture ⒏ three-phase voltage regulator regulator input AC Contactors‍ must take over the zero line (neutral), or else the regulator does not work, and will damage the regulator and electrical equipment. Do not use the land line to replace the zero line, zero line can not access the fuse.

9, the regulator output voltage is below the rated voltage (220V or three phase 380V), you should check the input voltage is too low. When you reach the rated voltage at no load and load output below the rated voltage, which is due to the input line carrier surface is too small, too big load line drop, using the input voltage falls below the lower limit of the regulator adjustment range, then should be replaced enter thicker wire.

10, when a large single load power (such as air conditioning, etc.), while the input line is longer, the carrier surface is inadequate when the load is severely reduced operating voltage, it may be difficult to start using load; when the load of work time and temporarily shut down, prone instantaneous overvoltage output power, such as the occurrence of such a phenomenon, not a regulator failure, should improve the input line (bold line, try to shorten the length of the input lines to reduce line pressure drop).

11, when the regulator output voltage is a serious deviation from 220V, you should check whether the input voltage ① within the voltage range; ② motor gear is badly worn, rotation air circuit breaker‍ is flexible; ③ limit switch is damaged: ④ coil plane is smooth; ⑤ Dashboard for damage

Air circuit breaker Safety issues

⒈ power supply during power-up, do not open the power supply or teaser power supply input and output connections, to prevent electric shock or other electrical AC Contactors‍ accidents.

⒉ power supply input and output connections must be reasonably arranged to prevent stampede frayed, causing leakage accident.

⒊ power supply must be grounded, because they do not run a ground wire and cause electric shock or personal injury air circuit breaker‍, the responsibility of the user.

⒋ ground power supply can not be connected to the heating pipes, water pipes, gas pipelines and other public facilities, in order to avoid infringement of third party rights or harm.

⒌ should regularly check the input and output wires of the power supply, so as not to loose or fall off, thus affecting the normal use of power supply and electrical safety.

Optional ⒍ regulator cable must meet requirements can carry enough current capacity of the cable.

. ⒎ regulator should be gently, at work to avoid Circuit Breakers‍ severe vibration;

⒏, ensure regulator carbon brush spring has sufficient pressure to avoid carbon brush arcing contact surface and the coil;

⒐, non-professionals do not open the power supply or power supply repair.

Works

Because section contains electrical coil assembly will produce electricity in the early hinder current eddy currents produced both weaken the instantaneous voltage electrical start-up, resulting in a slow start, will strengthen the instantaneous voltage generated after disconnection, may produce sparks damage circuit. At this point we need a regulator to protect the normal operation of the circuit.

Regulator consists of voltage regulator circuit, a control circuit, and a servo motor, etc., when the input voltage or the load changes, the control circuit sampling, comparing, amplified, and then driving the servo motor, so that the position of the regulator to change the carbon brush, by automatically adjusting the turns ratio, thereby maintaining a stable output voltage. Larger capacity regulator, also adopted the principle of Switchgear & Substation‍ working voltage compensation.

CNC Electric AC contactor is a contactor

AC contactor is a contactor, the typical structure is electri calmete‍ divided into direct-acting double break (LC1-D / F *) and single-breaker rotary (LC1-B *). AC contactor and relay control loop combination, remote control or interlock related electrical equipment. The most commonly used products are mainly for CJ series CJX2 series, CJ20 series, CJT1 series 3TB, B series.

The basic composition

AC contactor has four main components: (1) Voltage stabilizer‍ electromagnetic systems, including attracting coil, moving core and static iron core; (2) contact system, including three sets of main contacts and one or two groups of normally open, normally closed auxiliary contacts, which are linked together and moving core linked to each other; (3) interrupter device, usually larger capacity AC contactor has interrupter device to quickly cut off the arc burn from the main contact ; (4) insulated housings and AC Contactors‍ accessories, all kinds of springs, transmission, short ring, terminal and so on.

mcb circuit breaker

Works

When the coil is energized, the electromagnetic suction static core, the moving core pull, due to contact with the moving core linkage system, so moving core driven by three runs Switchgear & Substation‍ while moving contacts, contact closure, thereby turning power supply. When the coil is de-energized, suction disappeared, moving core linkage relies in part on the reaction force of the spring and separation, the main contact is open, turn off the power.

Use connection

One: There is generally a three-phase contactor eight points, three inputs, three outputs, there are two control points. Corresponding output and input are easily able to see it. If you want to increase the self-locking, then you also need the output from a terminal point of the line to the control point Circuit breaker‍ on it.

Two: first of all should know the principles of AC contactor. He is outside the power applied to the coil to generate an electromagnetic field. Power-pull, the contact point after power is disconnected. Know principle, you should figure external power supply contact, i.e. two contacts coils, generally in the lower part of the contactor, and at each side. Several other inputs and outputs are generally in the upper part, to see that. Also note that the number of applied voltage power supply (220V or 380V), are generally marked must have. Also note that the point of contact is normally closed or normally open. If you electri calmete‍ have self-locking control, according to the principle haircut line on it.