CNC Electric AC contactor can be divided into electromagnetic, permanent magnet and vacuum three.

Categories

Commonly used AC contactor CJ10, CJ40, CJ12, CJ20 and Energy Meter‍ the introduction of CJX, 3TB, B series.

Electromagnetic AC CNC Electric‍

Contact mainly by electromagnetic system, contact system, arc system and other parts.

① electromagnetic system: electromagnetic system includes an electromagnetic coil and core, is an important part of the contactor, rely on it to drive the contacts closed and disconnected.

② contact system: contacts are operative contacts, including the main contacts and auxiliary contacts. The role of the main contact and breaking the main circuit, control large currents, power transformers‍ and the auxiliary contacts are in the control loop, in order to meet the requirements of various control methods.

③ interrupter system: arc extinguishing means used to ensure that the circuit when the contacts open, arcing reliably extinguished, reduce damage to the arc of contact. In order to quickly extinguish the arc disconnected, usually contactors are equipped with interrupter device, generally semi-sealed longitudinal seam of clay interrupter cover, and with magnetic arc blow circuit.

④ Other parts: an insulating housing, a spring, circuit breakers‍ short-circuit ring, the drive mechanism and the like.

mcb circuit breaker Contactor

Works

When the contactor solenoid is not energized, the spring reaction force and the title of the core of the main contacts to keep the weight off position. When the solenoid is Cncelegroup‍ ON-controlled by the control circuit voltage (mcb circuit breaker), the electromagnetic force against the spring reaction force of the armature attracted to the stationary core, drive the main contacts are closed, connected to the circuit, along with the auxiliary contact action.

Permanent magnet AC contactor

Structure

Contactor is mainly driven by the system, contact system, interrupter system and other components.

① drive system: the ‍drive system includes an electronic module, soft iron, permanent magnet, is an important part of the permanent magnet contactor, relying on it to drive the contacts Air circuit breaker‍ closed and disconnected.

② contact system: contacts are operative contacts, including the main contacts and auxiliary contacts. The role of the main contact and breaking the main circuit, control large currents, and the auxiliary contacts are in the control loop, in order to meet the requirements of various control methods.

③ interrupter system: arc extinguishing means used to ensure that the circuit when the contacts open, arcing reliably extinguished, reduce damage to the arc of contact. In order to quickly extinguish the arc disconnected, usually contactors are equipped with interrupter device, generally semi-sealed longitudinal seam of clay interrupter cover, and with magnetic arc blow circuit.

④ Other parts: an insulating housing, Energy Meter‍ a spring, the drive mechanism and the like.

Air circuit breaker Feature and Works

Permanent magnet AC contactor is the use of magnetic repulsion of the same principle that opposites attract, and the formation of permanent magnet drive mechanism to replace the Circuit breaker‍ traditional magnet drive mechanism of a micro-power contacts air circuit breaker. Contacts mounted on the linkage of the permanent magnet fixed polar interactions and curing on the contactor base variable soft magnetic polarity to achieve pull, aim to maintain and release. Soft magnetic polarity variable cured together by its electronic module generates a dozen to two dozen milliseconds forward and reverse pulse current, and to produce a different polarity. According to the site required, the electronic control module to control the release of the voltage set value, may be a delay before the reverse pulse current is sent in order to achieve low-voltage time-release or delayed release of the power-off purposes, so that the motor control Akira power from the grid and jump stop, so as to maintain stable production system.

Innovative technical features of the permanent Switchgear & Substation‍ magnet AC contactor with permanent magnet drive mechanism to replace the traditional magnet drive mechanism, namely the use of a permanent magnet and microelectronic modules control devices, replacement of the traditional products of the electromagnetic device, no run current, only by the weak signal current (0.8-1.5mA). Microelectronic module contains six basic parts: a power rectifier; 2. Control power supply voltage detected in real time; 3. Release the storage (some also have pull storage, but not necessarily any); 4. energy storage capacitor voltage. detection; 5. interference threshold voltage detection; 6 release logic. This is a permanent part of the operating mechanism 6 essential part of the composition of the electronic control, the absence of any one part of the operating mechanism will not work under certain circumstances. This six part, will determine the operating Cncelegroup‍ mechanism may have anti-shake electrical function.

CNC Electric Energy and no noise:

Traditional contactor closing is maintained by closing the electromagnetic coil is energized opening spring force to overcome to achieve, once the current smaller so that the Inverter Power Supply‍ electromagnetic force generated is insufficient to overcome the spring reaction force, the contactor can not keep closing state Therefore, the conventional AC contactor coil closing maintain that we must rely on electricity to maintain continuous, and this current from tens to thousands of milliamps. The permanent magnet AC contactor closing rely on the permanent magnetic force to maintain, without the need to generate an electromagnetic coil through the current closing force to keep only the electronic module 0.8mA-1.5mA operating current, thus, to maximize savings power, energy-saving rate of over 99.8%.

Traditional AC contactor coil is energized by closing maintain the electromagnetic force to make silicon, silicon pull so happened that when the grid voltage is low or uneven surface or movement silicon dust and foreign matter, there will be noise generation. The permanent magnet AC contactor closing to keep relying on the permanent magnetic force to maintain, so there will be no noise generation.

. ③ no temperature:

Rely on the conventional contactor coil is energized Electric transformer‍ to generate sufficient electromagnetic force to hold the pull coil is composed of a resistor and an inductor, a current is bound to the long-term heat, on the other hand, the magnetic flux passing through the core will produce heat, both heat contactor chamber together in often the contactor coil burned, while reducing the heat capacity of the main contacts. The permanent magnet permanent magnet AC contactor is to rely on force to maintain, without maintaining the coil, naturally there is no temperature rise.

. ④ contacts without chatter:

Retention of traditional AC contactor is energized by the coil to achieve, retention force with current, relevant magnetic gap, when the voltage fluctuations in the closing and opening a critical state, is in a similar close contact like sub-state, it will continue to tremor, causing contact welding or burning, leaving the motor burned out. The permanent magnet AC contactor retention, totally dependent on the permanent magnetic force to achieve a complete pull, voltage fluctuations will not affect the permanent magnetic force, either in the pull-state, or is in the open state, not in the middle of the state, Therefore, Circuit breaker‍ the possibility will not be the main contact chatter and burned, burned the motor is greatly reduced.

mcb circuit breaker Long life , high reliability:

Contactor life and reliability is mainly composed of a coil and contact life decisions. Because of the traditional AC contactor coil and core work when it may have a fever, especially voltage, mcb circuit breaker‍ easily lead to fever current, the magnetic gap increases the coil burned, while the permanent magnet AC contactor coil may be burned does not exist. Contact ablation mainly by opening, closing arc generated when due. Compared with conventional contactors mcb circuit breaker, the role of permanent magnet AC contactor in the closing, in addition to the same electromagnetic force, but also with permanent force, thus closing speed is much faster than traditional AC contactor, after testing, permanent magnet AC contactor closing time is generally less than 20ms, while the traditional contactor closing speed is generally about 60ms. Sub-gate, in addition to the permanent magnet AC contactor opening action of the spring, but also has the effect of magnetic repulsion force, these two effects makes opening speed faster than the traditional number of contacts, after testing, permanent magnet AC contactor points opening time is generally less than 25ms, while the traditional contactor opening speed is generally more than 80ms. In addition, the heating coil and core capacity will reduce the main contact, suction voltage fluctuations caused by insufficient or tremor causes fever traditional contactor main contacts, arcing or welding. Permanent magnet AC contactor contact life compared with conventional AC contactor contacts, under the same conditions Voltage stabilizer‍ improve life 3-5 times.

. ⑥ anti-electromagnetic interference:

Permanent magnet AC contactor using magnetic circuit is completely sealed,, in the course will not be subject to external electromagnetic interference, nor will the external electromagnetic interference.

. ⑦ intelligent anti Akira power:

Electronic control module controls the release voltage value can be delayed by a certain time and then send a reverse pulse current to achieve low voltage power-off delay time release or release it from the motor control voltage fluctuations (Akira power) and jump stop, so as to maintain stable production system. Especially the device type continuous production enterprises can reduce venting and resume production of electricity, steam, natural gas Inverter Power Supply‍ consumption and labor costs, equipment repairs and other damage.

Air circuit breaker Selection Maintenance

Selection

AC contactor ① Press contactor control objects, the number of operations and the use of categories to select the appropriate category of contacts. ② by using the position CNC Electric‍ of the line of rated voltage selection.

③ Press the load capacity options contactor main contacts rated current.

④ For the attraction coil voltage levels and current type of control power requirements should be considered.

⑤ capacity options for auxiliary contacts, according to the quantity required and interlock loop connected to the contacts consider breaking current size.

⑥ for making and breaking contact with the capacity issues, the choice should pay attention to some of the load using the categories, such as capacitors, tungsten and other lighting device air circuit breaker‍, when connected to the current value of its large, on-off time is longer, the choice should be left margin.

⑦ for contactor electrical life and mechanical life issues, from the known average number of operations per hour and the life of the machine age, calculate the required electrical life, circuit breakers‍ if it can not meet the requirements should be derated.

⑧ selection should consider the environmental temperature, humidity, vibration using the workplace, dust, chemical corrosion, etc., should be the appropriate choice of different types of contacts environment.

⑨ lighting device is suitable for contacts, should also consider the type of lighting, the starting current size, duration and long-term work starting current, contact the current selection of electrical equipment should not exceed 90% (line) of the rated current. For tungsten and capacitive compensation lighting device, should consider making current value.

⑩ design should be considered a secondary device movement consistency.

Maintain

① operation inspection items: 1) whether the load current through within the contactor ratings in;

2) contactor switching signal indication is consistent with the state of the circuit;

3) Run the sound is normal, whether the issue due electri calmete‍ to poor contact discharge sound;

4) whether the electromagnetic coil overheating, short-circuit ring electromagnet without exception.

5) interrupter cover loose and damage;

6) whether the burning auxiliary contact situation;

7) transmission parts without damage;

8) whether the unfavorable factors in the operating environment to run, such as excessive vibration, poor ventilation, such as excessive dust.

② Maintenance:

When electrical equipment maintenance work should be a contactor and maintenance work.

1) External maintenance:

. a sweeping external dust;

. b Check all fasteners are loose, especially the mcb circuit breaker‍ conductor connecting part, to prevent contact with loose and fever;

CNC Electric contact system maintenance:

. a move to check whether the static contact position on the positive, while the three-phase is closed, any questions should be adjusted contact spring;

. b check the contacts wear, abrasion depth Voltage stabilizer‍ of not more than 1mm, contacts have burning, welding off when open, shall be replaced; when slight burning, generally does not affect use. When allowed to use sandpaper to clean the contacts, use plastic file;

. c white insulation resistance measurements, resistance of not less than 10MΩ CNC Electric‍;

d. Check auxiliary contact action is flexible, shall comply with the value of the contact trip, check whether the contacts fall off, found the problem, it should be repaired or replaced.

3) the core part of the maintenance:

. a clean dust, especially the moving parts and core pull between the contact surfaces;

. b Check the fastening core, the core running loose will cause increased noise;

c. the core short-circuit ring has come off or mcb circuit breaker‍ broken should be promptly repaired.

4) solenoid maintenance:

. a measuring coil insulation resistance CNC Electric‍;

. b coil insulation discoloration, aging, coil surface temperature should not exceed 65 ° C;

c. Check the coil wire connection, if open welding, burning should be repaired. 5) interrupter cover part of maintenance:

. a check interrupter cover is damaged;

. b interrupter cover and Electric transformer‍ position location without loose change;

c. Remove the metal particles and debris in the arc chute inside the crevice.‍

mcb circuit breaker u low voltage alarm

1. The batteries need to be recharged.

2. Battery voltage is too low or bad, recharge, check the battery terminals, or with a dry cloth to clean the terminals.

u no the inverter output

1. Battery voltage is too low to recharge or replace the battery.

2. Load current is too high mcb circuit breaker‍, the power transformers‍ closure of some load restart inverter.

3. Inverter over-temperature protection. Let inverter cool for some time, and well ventilated place.

4. The inverter fails to start, restart.

5. Terminals reversed, the fuse is blown, replace the fuse.

u inverter does not work

Check the power switch, fuses and battery cable or cigarette lighter.

Inverters DC input

The reason of such failure often happens is the battery is not connected properly, positive and negative terminals of the inverter must be connected correctly and battery positive and negative, positive then positive, then negative negative, right after connecting the switch is closed, basically you can Electric transformer‍ solve such malfunction.

Inverter input and output fuse

Such failures are generally apparent that, as long as you can replace the fuse.

Battery voltage is higher than the nominal DC input voltage of 20%

The inverter has an operating voltage range, typically rated DC voltage of + -10%, should the higher the voltage, the need to replace batteries or replace the inverter in order to prevent damage to the machine.

Battery voltage is lower than the nominal DC input voltage of 15%

Such problems are mainly due to lack of battery power, you can just give the battery pack.

Load power is too large

Such pre-load problem is caused by lack of AC Contactors‍ power calculation, you need to increase or decrease the power inverter to power the load.