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Schneider miniature circuit breaker problem analysis and answer
Fault 1: The shell of Schneider MCB product is yellowed or burned.
Reason 1: It is very likely that the magnetic coil inside the circuit breaker is burned out because of harmonics or high-frequency signals.
Method 1: * The good thing is that the filtering can be satisfied with the use of 50Hz/60Hz power frequency.
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Schneider instrumentation accuracy
It refers to the degree to which the average value measured repeatedly under certain test conditions is consistent with the true value, which is indicated by error. It is used to indicate the magnitude of the error in the system. In practice, control tests are generally carried out with standardized substances or normative methods, and when there are no standardized substances or normative methods, it is often used to add ...
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Frequency characteristics of frequency converters – Schneider
a. Output frequency scale. The output frequency scale that can be controlled by the general inverter is generally 0.1Hz, and the highest frequency is different according to the functional indicators of the inverter, generally 400Hz, and some models are 650Hz. No matter how high the output frequency is, it belongs to the scale of high-frequency inverter.
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The protection function of the inverter - Schneider
Protective functions can be divided into the following two categories:
(1) After detecting the abnormal situation, the correction action is automatically carried out, such as overcurrent loss speed avoidance, regeneration overvoltage stall avoidance.
(2) After detecting the abnormality, the PWM control signal of the power semiconductor equipment is closed, so that the motor automatically stops. As...
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Schneider inverter control circuit
1. What is a control loop?
The network that supplies the control signal to the main circuit that supplies power to the asynchronous motor (voltage and frequency can be adjusted) is called the control loop.
Second, the composition of the control loop
The control circuit is controlled by the frequency ...
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Is there still an output after the UPS power is turned off?
1. After the UPS power supply is shut down, the output terminal is still powered, but the UPS power supply does not play a role at this time, and it is in a bypass state.
2. The power supply will not be cut off after the UPS power supply is shut down, because the UPS power supply will go bypass after the shutdown, there is still a mains power input at this time, ...
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How to choose the Schneider ATV71 and the meaning of the letter
The Schneider inverter model generally reflects the rated voltage, rated power, and load requirements of the inverter (heavy load is still light load type).
Here are 2 examples:
Example 1:
Schneider inverter model: ATV71HD11 ...
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Schneider servo model introduction
LXM23DU01M3X servo drive 0.1 kW
LXM23DU02M3X servo drive 0.2 kW
LXM23DU04M3X Servo drive 0.4 kW
LXM23DU07M3X Servo drive 0.75 kW
LXM23DU10M3X ...
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Measures to reduce the interference of Schneider inverters themselves
(1) Add inductance and capacitance on the input side of Schneider inverter to form an LC filtering network
(2) The power cord of the Schneider inverter is supplied directly from the transformer side.
(3) If conditions permit, a separate ...
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Methods to reduce the interference of Schneider inverters themselves
When there are high-frequency impact loads such as welding machines, electroplating power supplies, electrolytic power supplies, or slip ring power supply near the power supply system of Schneider inverter, the inverter itself is simply protected due to interference. It is recommended that users choose the following methods:
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Schneider inverter motor control mode
Fundamentals of magnetic flux vector manipulation
The control of a three-phase asynchronous motor is much more messy than that of a DC motor because the current, voltage, induced potential, magnetic flux, etc., of the stator and rotor are all alternating.
However, the stator winding of the three-phase asynchronous motor is a symmetrical three-phase winding, which exerts a ...
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THE DIFFERENCE BETWEEN SCHNEIDER CIRCUIT BREAKER EASYPACT AND MASTERPACT
First of all, both are low-voltage circuit breakers (below 1000V)
Let's start with Schneider Masterpact, which is a structural circuit breaker. The current rating of the structure varies from 800A ---- 6300A. The Masterpact series is divided into M series and MT series. The M series has been on the market since 1986 and was screened and delisted in 2002.
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Common analysis method for electrical control line faults - Schneider
1) Survey and research method. The investigation and research method is to understand the obvious problem phenomena through "seeing", "listening", "smelling", "touching" and "asking"; After visiting the operator, understand the cause of the failure; A common way to help find the fault point after asking others or consulting information ...
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Inverter control motor speed method - Schneider
1. Why can the rotation speed of the motor be changed freely?
Motor rotation speed unit: r/min number of rotations per minute, can also be expressed as rpm.
Example: 2-pole motor 50Hz 3000 [r/min]
4-pole motor 50Hz 1500 [r/min]
Conclusion:...
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Schneider UPS power supply preventive maintenance precautions
1 Contingency plan
Contingency plans are the top priority of preventive protection. Arrangements need to be better partnered with service providers to be part of the corporate programme. This means implementing processes and procedures for every type of thing, including contingency plans.
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Schneider molded case and miniature circuit breaker recommended models
Molded case circuit breaker recommendation
Schneider EZD series
Create a high-quality circuit breaker for secondary power distribution
EZD molded case circuit breaker is a product series of molded case circuit breakers specially designed for secondary power distribution by Schneider Electric, which is especially suitable for ...
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Electrical Control Line Fault Analysis Method - Schneider
1) Survey and research method. The investigation and research method is to "see", "listen", "smell", "touch" and "ask" to understand the significant faulty phenomena; After visiting the operator, understand the cause of the problem; A common way to help find faults after consulting others or consulting information ...
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Common maintenance problems for Schneider drives
1. Why is the inverter used for fan and pump loads to save energy?
According to the basic law of fluid mechanics, it can be seen that the fan pump load is a typical square rotation load, and its primary feature is that the speed n has the following relationship with the torque T and the load power P: T∝n2, P∝n3. ...
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Analysis of the reasons why the contact of Schneider contactor is not reliable
The unreliable contact touch will increase the touch resistance between the dynamic and static contacts, resulting in the high temperature of the touch surface, making the surface touch become a point touch, and even showing a non-conduction phenomenon. The reasons for this failure are:
(1) There are ...
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AC-DC inverter composition and function - Schneider
The AC-DC inverter main circuit consists of three components: the rectifier main circuit, the center circuit and the inverter circuit.
1. The main circuit is the power replacement part that provides voltage regulation and frequency regulation power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two categories: the voltage type is the voltage source ...
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