Cncelegroup Troubleshooting "Resist" faulty judgment and handling

Happen "Resist" The situation is basically the closing operation and reclosing process. The dangers of such a large failure, for example, in case of an accident requires emergency backup power input, if the standby power switch on the circuit breaker to refuse, it will expand the accident. Judgment CNC Electric‍ circuit breaker "Resist" the causes and treatment generally three steps.

1) Check before closing time refused whether caused by improper operation (such as control switches let go too fast, etc.), and then combined with a control switch once again.

2) If the closing is still not successful, check the electrical circuits of each part, so as to determine whether faulty electrical circuit. Check the project are: closing control power supply is normal; closing closing loop control circuit fuse and the fuse is good; closing of the contactor contacts is normal; the control switch to the "switch on" position, look at closing core action is normal.

3) If the normal electrical circuit breaker is still not closing, then to mechanical failure, should be discontinued breakers, report scheduling maintenance treatment.

After more than a preliminary examination can determine electrical connection, or mechanical failure. Common faults and mechanical failures of electrical circuits are described as follows.

A common fault electrically

If the closing operation before the red, green not lit, AC Contactors‍ no power or control loop control has broken phenomenon. You can check whether the power and control of the entire control loop of the normal component, such as: operating voltage is normal, the fuse is blown, anti-hop relay is normal, the breaker auxiliary contact is good contact and so on.

When the operation switch on the green light flashes, and the red light does not shine, instrument no indication, horn sound, mechanical breaker points, closing position indicator is still in the OFF position, then the position of the operating handle position and the circuit breaker does not correspond breaker is not closed. The common causes are: closing the loop blown fuse or bad; closing the contactor is not activated; closing coil failure.

When the operation after closing the circuit breaker, the green light is off, the red light goes off after momentary bright, green light flashes and there is also the horn sound, indicating that the circuit breaker is closed and then automatically tripped. The reason may be caused by a circuit breaker protection combined current transformer‍ mechanical failure or circuit breaker tripping the circuit breaker can not be maintained in the closing state on the fault line.

If the green light flashes when the operation switch on or off, the red light does not shine, but there is indication meter, mechanical points, closing position indicator in the closing position, indicating the circuit breaker is closed. Possible causes are poor contact breaker auxiliary contacts, such as normally closed contact is not disconnected, normally open contact not closed, resulting in green and red light does not flash light; also may be electri calmete‍ closing or closing red burn circuit break .

Circuit breaker Maintenance

In order to make the main circuit breaker is in good working condition, maintenance and management must be strengthened.

1. Keep the air moist or dirty, do not clean electri calmete‍ the pipeline, are likely to cause the consequences:

(1) wet gas under the arc decomposed into a gas mixture of hydrogen and oxygen, destroy the main contact points between the insulation fractured fracture is difficult or arc reignition, can cause severe interrupter burst.

Breaker

(2) support insulator and arc interior cavity insulation strength decreases, resulting in surface discharge.

(3) in the pipeline patent leather, rust residue and other foreign objects that may block air intakes, the main circuit breaker operation failure occurs niche phenomenon.

(4) If the foreign body into the arc chamber, the main contact may cause a bad connection, due to long-term power nonlinear resistance and burning, can cause severe nonlinear resistance porcelain burst.

Therefore, in the intake manifold of the main circuit breaker equipped with air storage tank water separator, the lower part of the release valve, should be used to maintain current transformer‍ regular road drainage to maintain clean air.

2. Regular replacement of rubber parts

Main circuit breaker is a complex structure of pneumatic electrical, sealing performance of the components are higher, in order to ensure good sealing performance, rubber parts should be changed regularly.

3. Regularly check the main components

Main components should be checked regularly to maintain good technical condition.

(1) interrupter

Main contact on a regular basis to detect and moving contacts overtravel spring recovery state, dynamic and static contact due to open, close frequently due to friction and wear, resulting in over-travel is reduced, the contact pressure is reduced. When overtravel is reduced to a certain extent, to replace the dynamic and static contact. Moving contact spring deformation recovery exceeds a certain limit, must be replaced.

(2) non-linear resistance

Maintain internal nonlinear resistance porcelain clean, circuit breakers‍ sealed, regular replacement of non-linear resistance porcelain desiccant. Varistor detect the resistance exceeds a certain limit, the resistance changes must be replaced.

(3) the main valve

Periodically check with the size of the piston and the valve between the size does not meet the requirements should be replaced.

Appropriately adjusting the drive air cylinder buffer, to ensure good isolation switch operation. Periodically check the accuracy of the piston and the cylinder between tie by trimming or replacement parts to ensure its good operational performance. (4) Transmission air cylinder

(5) Ventilation cock

Must be replaced periodically door filler plug, plug detect CNC Electric‍ ventilation doors, be adjusted to within the allowable range.

electric transformer Energy units of measurement

Watthour meter kW · h (commonly known as the 6 th degree on the numerical representation of the use of electrical power 1kw power consumed by work 1h 1kw.h = 3.6 × 10's)

Reactive power meter kvar · h

Word round counters and window Air circuit breaker‍ (LCD window):

Different colors and decimal integer bit in the middle of the decimal point; each word wheel has a multiplication factor (no decimal point) LCD multi-function table bit integer and two decimal places

Accuracy:

Relative error, with placed Circled numbers represent

Calibration current and rated maximum current:

Rated current: indicated in the above table is electri calmete‍ calculated as the base load current value: I b. Usually calibrated current meter shall be 0.005 times the starting current. A calibrated current meter is larger, the smaller the error when electricity metering.

The maximum rated current: meter long term work, errors and temperature to fully meet the requirements of the maximum current value: Imax Rated voltage:

Single-phase energy meter mark: 220V

There are three three-phase meter mark law:

. a direct access to the three-phase three-wire: 3 × 380V

. b direct access to three-phase current transformer‍ four-wire: 3 × 380 / 220V

Proportional relationship between the number of wheel revolutions or power and energy meter records the number of pulses:: meter constant r / kWh; imp / kWh

Rated frequency: 50Hz‍

Circuit breaker Linear Regulator

LDO is a linear regulator. Linear regulator used in its operation within the linear region of the transistor or FET, the excess is subtracted from the Power Transformer‍ application of the voltage in the input voltage to generate a regulated output voltage. The so-called drop voltage regulator means that the output voltage is maintained within the minimum input voltage and output voltage difference between the upper and lower its rating required 100mV. Positive output voltage LDO (circuit breaker ) regulator typically use power transistors (also referred to as pass-through device) as the PNP. This allows the transistor is saturated, so the regulator can have a very low dropout voltage, typically about 200mV; In contrast, the use of composite NPN power transistor traditional linear regulator drop of about 2V. Negative output LDO use NPN as its transfer equipment, its operation mode and the positive output of the LDO PNP devices similar.

Updates development using CMOS p‍ower transistors, Electric transformer‍ which can provide the lowest dropout voltage. Using CMOS, only by the regulator power supply voltage drop is the load current ON resistance caused. If the load is small, the pressure drop generated in this manner only a few tens of millivolts.

Laser cutting machine with regulator

According to the requirements of high-power laser cutting machine, should be strictly in line with the regulator to develop a laser cutting machine, designed to stabilize the AC voltage and developed energy-saving products. When the power distribution network voltage fluctuations or load changes, can automatically ensure a stable output voltage. Must have a large capacity, high efficiency, wide voltage range, no additional waveform distortion and phase shift, the strain time fast, smooth and so on. Short circuit, mechanical failure, such as improving police protection, Inverter Power Supply‍ while the volume as much as possible to be compact and easy to use.

electric transformer Regulators Product structure

Regulators picture a typical switched-capacitor converter comprises four large MOS switch, which switches the order of a typical switch, doubling or halving the input supply voltage. Air circuit breaker‍ Energy transfer and storage provided by an external capacitor, for example with the Chinese company isolation transformer products on the market environment, production management, import and export products, industry investment environment and sustainable development issues on the basis of industry trends and make the analysis and prediction of qualitative and quantitative. In transformers, electric transformer, voltage regulators and other low-voltage products supporting the production, development, sales, "adhere to corporate innovation, the main products are: SBW power compensation for electricity regulator, SBW-F sub-tone regulator, SVC precision automatic exchange regulator, sophisticated purification regulator, the microcomputer non-contact voltage regulator, SG \ SBK isolation transformer, OSG \ QZB autotransformer, ZSG \ ZDG rectifier transformer, SSG servo transformer, DN resistance welding cooled transformers, reactors, contact auto voltage regulator, voltage regulators and other high-power electric pillar electrical equipment. product design, small size, attractive appearance, with electric energy meter‍ a low loss, low noise, impact resistance, etc. Widely used All applications need to guarantee the normal voltage in the mining industry, textile machinery, printing and packaging, petrochemicals, schools, shopping malls, elevators, telecommunications, and medical equipment.

In the first part of the switching cycle, the input voltage applied to a capacitor (C1). In the second part of the switching cycle, the charge transfer from C1 to the second capacitor C2. The most traditional switched capacitor converter is constructed with an anti-converter, which has a ground positive terminal C2, its negative side delivery negative output voltage. After a few cycles, the voltage across C2 will be applied to the input voltage. Assuming there is no load on the C2, there is no loss of the switch and no continuous resistor in a capacitor, the output voltage will coincide with the negative of the input voltage. In reality, the efficiency (and the resulting accuracy of the output voltage) depends on the switching frequency of the charge transfer resistance, the value of resistance of the capacitor and continuous switch. A similar voltage doubler topology using the same switches and capacitors, but changed the ground connection and input voltage. Other more complex variant products using additional switches and capacitors for input voltage and output voltage of other transition rate, and in some cases, to generate fractional relationship (e.g., 3/2) the use of specialized switching sequence. In various simplest form electric transformer‍, a switched-capacitor converter is not provided with the function of the regulator. Some new Power Transformer‍ National Semiconductor switched capacitor converters with automatic adjustment of gain levels to produce a regulated output; other switched-capacitor converters use a built-in low-dropout linear regulator to create unregulated output.

Circuit breaker Error flag

Error flag is an open collector output, when the regulated output voltage is lower than 5% of the rated output voltage (typical), it will send a signal. Initially, the error flag is low until the output voltage Voltage stabilizer‍ reaches 95% of the rated output voltage is reached. In some cases, an error flag appears in the power converter there is a delay. This delay is set by an external capacitor, and can be used as power-reset function to reset the microprocessor to power up. If the display state "error", the output voltage is lower case such that the open collector output is high (Circuit breaker ). When the output voltage is within 5% of rated voltage up and down, this flag output is low.

Switch

"On / Off" or "stop" feature allows the regulator to be able to open or close the case charged. While in "off" or "stop" mode, the regulator supply current because the output is disabled and fell to a lower level, but the internal bias circuitry is still running. By re-enabled when the regulator will shut down than the input Air circuit breaker‍ voltage and opened the case again much faster output voltage regulation. If the display in the "on" state, the logic high voltage regulator is started. Otherwise, a logic low will be started.

Cncelegroup Adjustment

In switching regulators and switched capacitor converters using an internal oscillator to set the switching frequency of the output transistor. The value of the switching air circuit breaker‍ frequency can be determined in some external components used in the converter, to determine the frequency of the noise generated by the converter, and the impact performance of the converter. Some converter allows to adjust the internal oscillator frequency ("frequency adjustment") or by synchronizing oscillator with an external power supply ("sync") to change the switching frequency. Generally, by increasing the switching frequency, with smaller parts (capacitors, inductors) in the converter output stage. This may reduce the efficiency of the converter, because of the increased switching losses, unless while using higher quality components. Good performance higher frequency than the lower frequency converter converter has a faster transient response. Electric transformer‍ If a board has several converters, it is often best to sync them to a common source. It can control the noise generated by the entire batch, and to minimize any "tapping frequency" may arise. This problem is usually very important for high-power converter (e.g. power 5W or higher). In many cases, the switching frequency can increase from its preset value. Product data sheets will mark the frequency range of the function.

Capacity curve

Auto regulator (single-phase 0.5kVA ~ 3kVA, 10k and below the horizontal, three-phase 9kVA and below) when the input voltage drops below 198V, output capacity began to decline; when the input voltage is equal to 160V, down to 50% of the rated capacity of the regulator. Therefore, the lower end of the supply voltage with particular Voltage stabilizer‍ attention to lighten the load derating, so as not to overload the regulator burned;

electric transformer

Picture auto regulator regulator can simultaneously output two voltage 220V and 110V. But even when all the output from 110V, the load carried by the regulator can not Voltage stabilizer‍ exceed 50% of rated capacity, otherwise overload use.

⒈ received the regulator input distribution board and the placement of the power distribution panel retention rates in line with the instrument power fuse to ensure safe use of electricity.

⒉ will supply electrical equipment connected to the output terminal of the instrument, pay attention to the input voltage and the output of the regulator should be consistent with the electrical rating electric transformer‍, do not take the wrong.

⒊ first open the regulator's power switch, indicator lights work. Observe the voltmeter indicate the value is normal. When the output voltage is normal, and then turn the power switch electrical equipment, this regulator that is able to automatically adjust the voltage, the normal power supply.

⒋ when unused for long periods of electrical equipment, turn off the power switch of electrical equipment in order to reduce power consumption and extend the life of the regulator.

⒌ regulator must not overload use. When the electric meter‍ mains voltage is low, the output capacity is reduced, the regulator should be a corresponding reduction in the load.

When ⒍ elected appliances have refrigerators, air conditioners electric transformer‍, pumps and other equipment have the motor running, you should choose more than three times the capacity of the regulator, in order to avoid device startup current exceeds the regulator fuse current or overcurrent protection circuit breaker current to voltage regulator blown fuse or circuit breaker tripped or drop too large to work.

⒎ wire connected with the regulator should have sufficient load surface, preventing the heat and reduce the pressure drop. 2KVA above capacity regulator uses terminal connection should be used in a single copper wire, and try to tighten the terminal screws to prevent the junction of fever.

⒏ either single-phase or three-phase voltage regulator, after connect all input and output lines, you should turn off the load of the power switch, and then open the regulator, after air circuit breaker‍ checking the output voltage is normal, and then turn on the power switch on the load.

Cncelegroup Saturation characteristics of the core material to use emergent output voltage stable.

Advantages: reliable, overload, output short circuit protection automatically, simple mcb circuit breaker‍ structure, large voltage range anti-interference ability.

Disadvantages: Weight big, bulky, expensive, noisy, core temperature rise, the operating frequency of the input power requirement is high.

Applications: computer-related products, medical monitoring systems, process control systems, automatic test equipment, radio and television equipment, telecommunications equipment, Power Transformer‍ automatic plug-in machines, production lines, printing equipment, plastic injection equipment, automatic teller machines, SMT equipment, research and testing.

Magnetic amplification exchange regulator basic structure:

By changing the series in the primary circuit of the magnetoresistive magnetic amplification autotransformers to stabilize the output voltage of the transformer.

Advantages: High voltage accuracy, fast response time.

Disadvantages: heavy weight, large volume, high price.

Applications: sophisticated electronic Voltage stabilizer‍ equipment, medical equipment, computer rooms, laboratories, product aging and testing.

Circuit breaker Fault performance, cause analysis, summarized excluded

Failure Analysis

Boot no output, no voltage indication, or no start

⒈ overvoltage or undervoltage Circuit breaker‍ protection of the (internal regulator output voltage adjustable potentiometer)

⒉ wrong phase and lack of protection of the (three-phase exchange any two phases)

⒊ main control board is bad (replace)

⒋ output AC is bad (replace)

The output voltage is not normal

⒈ same tune regulator (replace sub-tone regulator)

⒉ over the regulator's own voltage range (to replace a wide range of regulator)

⒊ travel limit switch is bad (replace)

⒋ phase circuit board is mcb circuit breaker‍ bad (replace)

⒌ servo motor burned (replacement)‍

electric transformer, Circuit breaker Unregulated

⒈ over the regulator's own voltage range (to replace a wide range of regulator)

⒉ travel limit switch is bad (replace)

⒊ board is bad Circuit breaker‍ (replace)

⒋ servo motor burned (replacement)

Work trip for no reason

⒈ small total gate capacity selection (replacing the appropriate capacity air switch)

⒉ air switch is bad (electric transformer,‍)

⒊ momentary surge voltage is too high (to replace non-contact high-precision voltage regulator)

Regulators Internal buzzing sounds great

⒈ overload load up (after reduction connected equipment)

⒉ internal debris inside Electric transformer‍ (to remove debris)

Regulators Internal loud creak

⒈ voltage instability (normal)

⒉ Brush surface grime (after removing dirt outage calls)

Regulators can not run automatically

⒈ automatic toggle switch is not turned on (on)

⒉ circuit board failure (electric transformer,‍)

Press the panel no boost or buck buck

(Non-power regulator is no such function)

⒈ servo motor burned (replacement)

⒉ travel limit switch is bad (replace)

⒊ circuit board burned (replacement)

⒋ manual, automatic knob is not open to the manual (open to the manual)

Tips: If the regulator fails, can not be mcb circuit breaker‍ ruled out when they can not stop when the power supply to the back-end equipment; please contact a professional company.

Circuit breaker Regulators general maintenance inspection items are as follows:

⒈ regulator if there is design, installation defects;

⒉ check regulator load current, operating Inverter Power Supply‍ voltage is normal;

⒊ check for leaks oil regulator phenomenon, oil level, oil color, temperature not exceeding the allowable value, ONAN top oil regulator is generally below 85 ℃, strong oil-cooled and water-cooled stable and strong oil pressure should be at 75 ℃ or less;

Check the regulator ⒋ high and low voltage ceramic casing is clean, circuit breaker‍, damage and flashover traces of discharge;

Terminals ⒌ check whether the regulator is bad, overheating;

Check whether ⒍ normal regulator operation sound; have a uniform electromagnetic buzzing sound during normal operation, such as the internal discharge crackling sound may be breakdown of the winding insulation, such as electromagnetic acoustic uneven, probably iron core through the core bolt or nut loose;

Check the regulator ⒎ hygroscopic agent reaches saturation;

⒏ Check regulator is normal oil sectional door, sectional Air circuit breaker‍ door to the gas and the radiator relay sectional door is in the open state;

⒐ check regulator diaphragm tube explosion is complete, whether carved glass diaphragm has "ten";

⒑ check regulator cooling device is operating properly, the heat pipe temperature is uniform, whether the pipe clogging;

Check the chassis ground ⒒ regulator is good;

Whether filled with gas relay ⒓ check oil, no gas is present;

⒔ outdoor regulators focus on checking the foundation is good, with or without foundation sinking of change sets bar, checking whether the firm poles, wood, stem root rot whether the phenomenon.

⒕ indoor regulator, focus on checking doors and mcb circuit breaker‍ windows are in good condition, check the wire gauze shutters are complete;

⒖ other items should be checked.‍

electric transformer Electricity Related difference

Electricity is generated a magnetic field, the magnetic field also can be converted into electricity. Put a pass on the AC coil, it will generate an alternating magnetic field electric transformer‍, then the alternating power transformers‍ magnetic field through the other coil, the coil will induce a voltage to another, it is the principle of the transformer, the transformer and the number two a coil turns relating; simply put, is the use of magnetic coupling of the transformer principle, all the former secondary winding (coil) composition, size, and is proportional to the voltage across the coil turns of the coil, so that the number of turns of the primary and secondary windings the ratio determines the transformer turns ratio this. It is clear that there is no role of regulator transformers, because the secondary voltage with the primary voltage changes.

Regulator principle is the use of negative feedback, so to speak, will be open to the half faucet tap, faucet mounted at the exit of a sensor that can detect how much water, if the water Electric transformer‍ volume electric transformer, and will automatically will tap off a small point, if a small amount of water, it will automatically open a large number of taps, so always keep a constant amount of water. Regulators principle generally the case, there can be detected a change in output voltage of the circuit (the error amplifier inverting input voltage dividing resistors sampling circuit, this circuit can be reduced to only one integrated chip) in the voltage regulator, when the output voltage changing when the output voltage change is detected by the chip circuit provides feedback to the servo motors, servo motors driven by another location jib automatically adjust the brush, so that the output voltage stability, which is the easiest regulator.

In summary said, there is no regulation of the role of the transformer, but the use of negative feedback can be designed with the role of regulator transformer, this is no problem, but in Inverter Power Supply‍ general the transformer is not the case. Transformer in a certain range of output voltage change is small, said regulator is not a concept.

Cncelegroup power circuit breaker

All regulators, have taken advantage of the same technology to achieve stable output voltage. Output voltage dividing resistors connected to the amplifier inverting input Switchgear & Substation‍ terminal of the sampling error, the error amplifier non-inverting input connected to a reference voltage. Always try to force the error amplifier input equal at both ends. To this end, it provides the load current to ensure that the output voltage stability (ie negative feedback).

Regulators pictures regulator and UPS are different concepts, but many of my friends are always wrong to think the regulator is UPS, essentially there is a difference; UPS into line and back-up, general computer equipped belong back-up, and it belongs to an emergency power supply; back-up is an electronic switching regulator with the regulator part, can be used as the regulator Used, but regulators are not effective; regulator: it is against voltage instability designed primarily as a back-end equipment protection purposes, for equipment protection function better. electric energy meter‍ Generally large UPS systems must also be equipped with a bypass regulator that LW-PLG regulator. The above describes the concept of the regulator, UPS is here to talk about what?

UPS in Chinese means "uninterruptible power supply" is the English "Uninterruptible Power Supply" acronym, it can protect the computer system after a power outage to continue working for some time to allow the user to save an emergency, so you do not work due to power failure or loss of influence data. It is in the computer systems and network applications, mainly plays two roles: one for emergency use, to prevent a sudden power failure affecting the normal operation, causing damage to a computer; the second is to eliminate surges on mains, instant high voltage, instantaneous low voltage, wire noise and frequency Air circuit breaker‍ offset and other "power pollution", to improve power quality, providing high-quality power for computer systems.

Circuit breaker inverter

In principle, the basic application, UPS is a storage device containing, as the main component in the inverter, power protection devices output voltage frequency stabilization. Voltage stabilizer‍ Rectifier consists of several parts, batteries, inverter and static switches and other components.

1) rectifier: rectifier is a rectifier, simply means that the AC (AC) is converted to direct current (DC) devices. It has two main functions: first, the alternating current (AC) into direct current circuit breaker‍, supplied to the load by filtering, or the supply of the inverter; second, to provide a charging voltage to the secondary battery. Therefore, it is also to play a role in the charger;

2) Battery: UPS battery is used as a storage means for electrical energy, which consists of several cells connected in series, which determines the size of the capacity sustain discharge (supply) time. Its main function is: when the mains is normal, the electrical energy is converted into chemical energy stored in the battery inside. When the mains fails, the chemical energy into electrical energy supplied to the inverter or the load;

3) Inverter: Popular speaking, the inverter is a direct current (DC) is converted to alternating current (AC) of the device. It consists of an inverter bridge, control logic and filter circuit;

4) Static Switches: static switch, also known as static switch, power transformers‍ which is a non-contact switch, is a two SCR AC switch (SCR) reverse parallel composition, the closing and opening by logic controller control. Conversion type and model is divided into two. Conversion type switch is mainly used for two-way power supply system, its role is to automatically switch from the road all the way to the other; and models switch is mainly used in parallel with the mains inverter or multiple inverters.

Regulator is stable voltage by beating the relay. When the grid voltage slight fluctuations, or within a certain range of open or close other appliances will cause the power regulator circuit is activated automatically corrected, frequently beating the relay. Each relay beat shift, will make a brief power supply interruption occurs. Although this does not affect the normal use interrupt other household appliances, but highly sensitive computer literacy interference inside is great, every regulator beating shift, like an instantaneous pulse input in the computer, the computer is likely Switchgear & Substation‍ to cause an error signals serious cases cause damage to the hard disk or floppy drive stuck.

electric transformer Authenticate

General medical device class stage power needs through FCC-B, electric transformer‍, EN55011550226120461000 such as electromagnetic compatibility and immunity Air circuit breaker‍ to electromagnetic interference testing. Select the completion of these tests not only within the right equipment to ensure the electromagnetic influence other electronic components, and medical equipment can reduce development cycles and time to market prior to the subjects.

Size and high power density

In addition to medical and multifunction devices, high-precision detection and adjustment direction, the smaller size and portability is a development direction. This requires medical equipment supply must have a higher power output in a smaller board area conditions.

Special Applications

Centralized power supply products on the market mcb circuit breaker‍ are mostly standard output, even though there are some products can be by way of an external power supply circuit, output adjustment, the adjustment range is not large, but stability is also problematic. If you hit a low voltage, high current or high voltage DC on how to handle the situation, of course, can be used to customize the way, but the price is quite high, the customer can accept.

Price

Today the price of medical equipment due to fierce competition, has gradually transparent, especially some small home medical equipment, prices have been very popular and mass. Switchgear & Substation‍ So this requires an important part of medical devices - power, there must be price competitive.