Schneider circuit breakers are used to open and break communication loops. The arc extinguishing of the communication system is simple, but the arc extinguishing of the DC system is more difficult. Because the system is different and the arc extinguishing principle is different, there is a big difference in structure and performance between the communication circuit breaker and the DC circuit breaker. DC circuit breakers require the addition of additional arc extinguishing equipment to enhance arc extinguishing capacity compared to communication circuit breakers.
In principle, the communication circuit breaker should not be used in the DC circuit, whether it can be used in the DC, the key is whether the DC current can be blocked. It is mainly considered from the following aspects:
1. Communication current, when the contact is broken, there will be arcing, that is, the so-called "arc pulling phenomenon". When the current crosses zero, the arc will be calmed down quickly with the cooling effect of the arc extinguisher, so that the circuit will be blocked. The contacts that intercept the current are of course important, but what really matters is how the arc is blocked. Because of the high temperature and ablation caused by the arc, it is the key to determining the life of the contact.
2. DC current is not simply blocked, which means that the DC arc is not simply blocked. The reason is that the DC arc does not have a "zero-crossing" state, so although there is a cooling of the arc extinguishing cover, it is not simply to block the arc. The moment of the arc is the key to determining the life of the contact.
3. The DC current of the communication circuit breaker is only one-tenth of the original. The DC current through the communication circuit breaker is smaller, and when it is broken, although the arc time is long, it is still relatively simple to extinguish the arc. Naturally, the contact system has the same longevity as it was when it was communicated.
4. Whether the communication circuit breaker can be used for DC current is not only whether the contact system can block the DC current, but also to ensure the action life of the contact system. If the contact system can only be disconnected a few times before hanging, such a circuit breaker cannot be used.
There are also DC circuit breakers, and their internal contacts and arc extinguishing systems are basically the same as communication. Only the manufacturer calibrates according to the amount of DC current. So what you see is a circuit breaker with a large volume, and the "extra DC current" passing through is not large, and that's why.
|
More on that
|
Inverter braking resistor selection – Schneider
In the process of fast parking, because of the inertia, a lot of regenerative electric energy will occur, which will directly act on the intermediate DC part of the inverter, and if this part of the electric energy is not consumed, the inverter will be faulty or the inverter will be damaged. The braking resistor is used to dissipate this part of the electrical energy. ...
|
|
Schneider UPS power supply common fault analysis
1. When there is mains power, the UPS output is normal, and when there is no mains power, the buzzer beeps for a long time and there is no output
Fault analysis: From the phenomenon to identify some problems of the battery and inverter, you can view it according to the following procedures:
1. Check the battery voltage to see if the battery is undercharged.
|
|
Schneider servo motor advantages
Schneider servo motor is one of the brands of servo motor, the performance is relatively good, is a brand made in Germany, in China ** degree is relatively high. Servo motor refers to the servo system, (servomechanism) in which the mechanical components are controlled.
|
|
Analysis of the causes of Schneider touch screen touch deviation
(1) Fault--: Contact error
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 correcting the bearing. Solution 1: Re-align the bearing.
Phenomenon 2: Some districts ...
|
|
Pressure Reducing Valve in Instrumentation – Schneider
A kind of pressure reducing valve in instrumentation refers to a kind of equipment used to control the pressure value. Pressure reducing valves are usually used in water-related categories, because from the perspective of the transmission medium, the transmission medium of the equipment is mainly water, but we all know that water is a thing that will ...
|
|
Schneider PLC series features
Schneider TSX08 series NEZA PLC
It is a small PLC with abundant functions, small size, strong general-purpose type, and high cost performance.
NEZA series adopts a new generation of handheld programmer, and the operating system adopts PL707-WinCE to support Chinese interface. In the process of use, whether it is ...
|
|
Schneider Instrumentation Classification
1. Industrial automation appearance and control system. This is generally referred to as PA, FA in foreign countries. PA is called process automation, and FA is called factory automation. The appearance and control system used in process automation and factory automation belong to this category, and some parts of the appearance of analytical instruments and electrical instruments also belong to the ...
|
|
Frequency converter main circuit fault solution - Schneider
According to the statistical analysis of the frequency and shutdown time of the specific common problems of the inverter, the repair rate of the main power supply circuit accounts for more than 60%; The main operating parameters are set improperly, resulting in about 20% of common problems; 15% of the common problems of manipulating circuit boards; 5% of common problems are caused by incorrect operation and external anomalies ...
|
|
Detailed explanation of the steps of Schneider inverter inverter setup
1. Macro equipment:
In view of the control requirements of different loads, Schneider inverters have talked about the macro equipment in advance and the initial function of the I/O terminals.
Changes to the macro rig can be corrected under the Abbreviated Boot Menu.
If required, it is also possible to re-equip the end separately ...
|
|
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...
|
|
Schneider inverter frequency signal source mode
In order for the inverter to operate normally, it must have two basic conditions, that is, the frequency signal and the operating signal, let's talk about the first condition, which is the frequency signal of the inverter.
Our intention to use the inverter is to change the ...
|
|
The reason for the inverter trip - Schneider
Whenever the inverter is down due to a problem, a problem code will appear. The most common causes are overcurrent, overvoltage, inverter temperature, etc. It's a good idea to find an explanatory book with specific questions to be asked about.
1. Overload jump ...
|
|
Schneider TRSS telemetry system solution
Schneider Electric provides safe, reliable, end-to-end telemetry solutions to help you meet the challenges of long-distance operations. With an outstanding reputation in the fields of appearance, manipulation and data collection, wireless communications, IT, and other industries and common sense, Schneider Electric telemetry system solutions can help ...
|
|
The form of power input and output - Schneider
1. Single-phase input/single-phase output:
If the capacity is relatively small, the single-entry UPS hanging on any phase of the mains will not be troublesome to the three-way distribution balance of the mains, the load capacity is small, and the output line diameter (current value) of the single-phase output is not ...
|
|
Schneider Multi9 Series C120 FAQs
1. What are the characteristic curves of Schneider Multi9 series C120L?
A: C/D curve.
2. What is the rated current level of Schneider Multi9 series C120?
A: 63A, 80A, 100A, 125A.
3. Shi ...
|
|
The cause of leakage in the motor using the inverter - Schneider
1. The output of the inverter is controlled by PWM (pulse width modulation, similar to high-speed switching), so high-frequency leakage current will occur.
The PE points of the three transmission equipment of the inverter, the pre-power supply transformer and the motor must be connected together and then grounded consistently.
Frequency conversion...
|
|
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 ...
|
|
Schneider inverter ATV32 acceleration and deceleration operation method
1. Use the operation method of clicking the button:
In addition to the direction of travel, 2 logic inputs are required to add a speed given, e.g. LI5 is assigned the acceleration function, and LI6 is assigned the deceleration function. Then pressing LI5 will make the speed given increase, and pressing LI6 will make the speed given speed decrease ...
|
|
Precautions for the selection of Schneider molded case circuit breaker
1. Shell current and rated current
The size of the shell current is 100 (rated current 16 25 32 40 63 80 100) 250 (rated current 160 250 400 (rated current 250 400) 630 (rated current 630A.)
...
|
|
Knowledge of Schneider Lexium32 servo motors
Schneider Lexium32 servo motor new generation servo release enriches Schneider Electric's high-end product line, its outstanding product functions, sensitive openness and user-friendly planning will better meet the high functional and safety requirements of industrial customers. In China's industrial production is increasingly moving towards energy-saving ...
|
|
Contact
working hours
