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 questioning others or consulting information. This method is highly efficient, empirical, and skilled, and needs to be continuously accumulated and summarized in long-term production practice.
2) Logical analysis. Logic analysis method is a method to analyze the problem according to the operating principle of the electrical control circuit, the action program of the control link and the connection between them, and combine the problem phenomenon. It focuses on the problem phenomenon, conducts specific analysis of the circuit, improves the pertinence of maintenance, can shrink the target, quickly judge the fault location, and is suitable for the fault viewing of complex lines.
3) Star measurement. The measurement method is a method of using calibration lamps, voltage testers, multimeters, buzzers, oscilloscopes, etc. to measure live or power-off of the line. When using a multimeter ohmic block and buzzer to detect whether the electrical components and circuits are open or short-circuited, it is necessary to block the power supply. At the same time, special attention should be paid to whether there are parallel branches or other circuits that have an impact on the measured line during the measurement to prevent misjudgment.
4) Experimental method. The test method is a method to find faults by energizing tests without damaging electrical and mechanical equipment. The energizing test is generally carried out in the form of "point touch". If it is found that the operation of an electrical appliance does not meet the requirements, it means that the fault range is in the circuit related to the electrical appliance, and then further check in this part of the fault circuit to find out the fault point. Sometimes you can also choose to temporarily cut off part of the circuit (such as the main circuit) to check whether the action of each control link is normal, but it is necessary to be careful not to use external force to make the contactor or relay act at will, so as to prevent accidents.
|
More on that
|
Schneider circuit breaker technical issues
1. Overload maintenance failure: The circuit breaker should be tripped for maintenance when the current exceeds the rated current, but sometimes the overload maintenance failure may be due to some reasons. This may be due to incorrect overload maintenance settings, long overload periods, thermal aging due to successive overloads, etc.
2 ...
|
|
Schneider AC inverter usage category
Under the IEC60947-4 standard, the Schneider communication contactor TVR series must be able to turn on and break the current value, and these currents depend on the type of break that the load is turned on, including squirrel cage or slip ring motor, resistor, when the switch or break is generated in the motor abort, start or run...
|
|
A brief description of the working principle of Schneider power soft starter
Schneider ATS48 soft starter is composed of three opposite parallel thyristors, which are connected in series between the three-phase power supply and the motor, by changing the trigger angle of the thyristor gate pulse, the conduction angle of the thyristor gradually increases from zero, according to the pre-set soft starter parameter curve, the motor output torque ...
|
|
Schneider Thermal Relay Model Meaning
The function of the thermal relay is mainly used to carry out overload maintenance on the asynchronous motor, and his operating principle is that after the overload current passes through the thermal element, the bimetal sheet is heated and twisted to advance the action organization to drive the contact action, so as to disconnect the motor control circuit to realize the motor power-off thermal relay ...
|
|
Inverter power-saving method - Schneider
First, it is a fan/pump load
Second, the device itself has a power-saving function (software support)
Third, we need to work for a long time
The above are the three conditions that reflect the results of power saving. If it is said that the power frequency of the inverter is energy-saving without conditions, it is ...
|
|
Schneider circuit breaker maintenance
1. Insist that the air is moist or unclean, and the pipes are not clean, which may have the following consequences:
(1) The wet gas is decomposed into mixed gases such as hydrogen and oxygen under the action of the arc, and the insulation between the fractures after the main contact is broken is destroyed.
|
|
Schneider touch screen touch deviation causes
(1) Problem--: Contact deviation
Phenomenon 1: The direction of the finger does not coincide with the mouse arrow.
Reason 1: After installing the driver, there is no vertical contact with the bullseye center when calibrating the alignment. Deal 1: Correct the position from the beginning.
Phenomenon 2: Some districts ...
|
|
Schneider Compact NSX series molded case circuit breaker selection recommendation
The molded case circuit breaker is an important part of the maintenance of the low-voltage distribution system and the motor, and maintains the safety of the distribution system and electrical equipment. As an important application scenario of molded case circuit breakers, these key occupations of new infrastructure such as new energy and telecommunications have extremely important equipment performance, stability and adaptability.
|
|
Schneider Electric Innovation Summit "The future is digital"
The name of a company's product was mentioned more than anyone could remember, but on the first day of the Schneider Electric North America Innovation Summit in Atlanta on Tuesday, another word appeared even more often ...
|
|
Inverter maintenance mantra method - Schneider
Don't worry about the damage of the frequency conversion, disassemble the machine after the discharge;
It is indispensable to ask for a diagnosis and clarify the problem at the beginning of the test;
Input and output PN junction, three-phase balance and then unshelling;
Look at the nameplate before powering on, the wrong voltage will blow up;
The bus has no electricity to see that it is safe, and the rectifier filter is wrong ...
|
|
Schneider circuit breaker maintenance method
1. Insist that the air is moist or unclean, and the pipes are not clean, which may have the following consequences:
(1) The wet gas is decomposed into mixed gases such as hydrogen and oxygen under the effect of arcing, destroying the insulation between the fractures after the main contact is broken, which is difficult to arc or arc re-ignition, and in severe cases, arc extinguishing will be formed.
|
|
For the first time, Schneider presents a new lightweight MES in packaging
Packaging Lightweight MES is a production line and workshop-level digital management and processing solution created by Schneider Electric based on more than 20 years of experience in packaging machine automation, combined with the digital transformation needs of the FMCG (Consumer Packaged Goods) profession, which can be widely used in food and beverage, life ...
|
|
Schneider's method of improving the power factor of UPS power supplies
One. The significance of the progressive power factor.
1. Make full use of the ability of power equipment.
Each power supply unit has additional capacity, i.e. depending on the power. The total power output of the power supply equipment S, - part of the active power, the other part is the reactive power, the smaller the ...
|
|
The difference between Schneider verification, calibration, and calibration
What is the difference and contact between the instrument, external work verification, calibration, and calibration?
Verification, calibration, and calibration are all static measurement processes that are carried out in cycles. The meanings are:
The verification ---- shall be arranged by the legal metrology department or the statutory authorization in accordance with the verification procedures, after ...
|
|
Schneider ATV32 inverter malfunction
1. The ATV32 inverter reports that the bLF is a brake control fault.
Possible causes: 1. The brake release current is not reached. 2. When the braking logic control is assigned, only the closing frequency threshold [brake closure frequency] (bEn) is adjusted.
Repair measures: 1. Check the inverter/electric ...
|
|
Schneider PLC intelligent parameter features
Characteristic:
1. NEZA PLC (TSX08 series)
EZA series is a small PLC with rich functions, high performance-to-price ratio, small size and strong versatility.
A new generation of handheld programmer - Chinese PDA PL707WinCE, supports Chinese interface, whether it is programming, ...
|
|
Precautions for external wiring of the inverter
In the process of connecting the line of the inverter, it is necessary to pay attention to the following aspects:
1. The power supply must be connected to the main circuit power terminal L1/R, L2/S, L3/T, if the power supply is connected to other terminals by mistake, the inverter will be damaged.
2. It is necessary for the grounding terminal to be well connected.
|
|
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.
|
|
The contents of the daily inspection of Schneider inverters
1) Whether the ambient temperature is normal or not, it is required to be in the range of -10-+40 °C, and it is better to be about 25 °C. whether the humidity meets the requirements, and whether the ventilation and heat dissipation of doors and windows are outstanding; Whether the lower air inlet and upper air outlet of the inverter are dusty or blocked due to excessive dust.
...
|
|
The ultimate short-circuit breaking capacity of Schneider circuit breakers
The limit short-circuit breaking ability (ICU) refers to the short-circuit current that can be turned on and broken under certain experimental parameters (voltage, short-circuit current, power factor) and through a certain experimental procedure, and after this on-off, it will no longer continue to carry its rated current. It's experiments ...
|
|
Contact
working hours
