Zhejiang Shendun Electric Appliance Co

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丨Control and protection switch丨
Control and protection switch Zhongkai Kaibao Xinling control and protection switch electrical appliance Guojia Ouyi factory direct sales price control and protection Jiangsu Yuantai Jiangsu Kailong Shanghai Jia A basic fire isolation pressure reducing resistor star-delta leakage
Mainly used in power systems with AC rated voltage to rated current. It can connect, carry and break current under normal conditions including specified operating overload conditions, and can Make and break currents under specified abnormal conditions, such as short-circuit currents.
Compared with the system composed of separate electrical appliances
It has the characteristics of self-coordination of control and protection. The series of control and protection switching appliances integrate control and protection functions, which is equivalent to circuit breaker, fuse + contactor + overload relay. +Auxiliary electrical appliances. It well solves the problem of protection and control characteristic matching between components that cannot or is difficult to solve with separate components, making the protection and control characteristics more perfect and reasonable. It has inverse time limit and instantaneous three-stage protection characteristics as long as it is based on the load power or current. You can correctly select a single product to replace the previous various electrical appliances from the power incoming end to the load end. There is no need to reduce the capacity, which greatly reduces the designer's workload.
It has unparalleled operating reliability and continuous operating performance of the system. It can be put into use without maintenance after breaking the short-circuit current, that is, it has continuous operating performance after breaking the short-circuit fault. After the breaking short-circuit current test is carried out, it can still be put into use. It has an electrical life of not less than 10 times, which is difficult to achieve by systems composed of separate components such as circuit breakers. This feature greatly improves the operational reliability and continuous operation of the system. Among them, the indicators are among the same kind. The product's international leading index is the highest domestically.
丨Control and protection switch丨
Energy-saving and material-saving has the advantages of small size, less installation area, no separate component contacts, reduced circuit heating, energy saving and material saving.
Compared with molded case circuit breakers
It has the characteristics of high breaking capacity and short arcing distance. When the rated operation short-circuit breaking capacity reaches high, the breaking type is the standard type and the economical type, breaking under the expected short-circuit current. The time is only ~, the current limiting coefficient reaches the lower level, reaches the leading level of molded case circuit breakers, and reaches the current limiting level of fuses, which greatly limits the dynamic thermal impact of short-circuit current on the system. The arcing distance is only ~.
Compared with the protection system composed of plastic case circuit breaker, the thermal trip inverse time limit current and the magnetic tripping time limit current, which have the characteristics of adjustable protection setting current, can be adjusted on the panel, that is, in addition to the conventional In addition to the thermal protection current that can be adjusted according to the load power, the overcurrent protection setting current can also be adjusted on the panel. The adjustment range for the distribution load is ~, and the adjustment range for the motor load is ~. It overcomes the disadvantage that the short-circuit protection setting current of the molded case circuit breaker cannot be adjusted by the user after leaving the factory, so that even if the product is installed at the end of the line and the short-circuit current is small, it still has a good short-circuit protection function.
Compared with the performance of contactors, it has the characteristics of long life and convenient operation
丨Control and protection switch丨
The mechanical life of the switch is ~10,000 times, and the electrical life is ~10,000 times. It can be used on-site Manual operation can also realize long-distance automatic control function. The advanced separation design of the contacts and the electromagnetic system is adopted, which effectively suppresses the secondary bounce of the contacts, greatly improves the electrical life of the product, and is especially suitable for severe occasions such as heavy-load starting.
丨Control and protection switch丨
Note
1. Under normal circumstances, when the rated current is below the switch, the main frame is selected. .
2. The basic configuration of the switch is the switch body + electronic overload release + short circuit alarm contact + overload alarm contact type: fire alarm contact + auxiliary contact, two normally open and one normally closed.
3. Please determine the design or adjust the setting current according to the actual load capacity and power.
4. One auxiliary contact is normally open and the other is normally closed.
Three auxiliary contacts are normally open and two are normally closed
5. For the rated operating current range of the overload electronic release, see the basic technical parameter table.
丨Control and protection switches丨
Complete product models and types
Basic models of series products
Series digital fire-fighting control and protection switching appliances
Series isolation type control and protection Switching appliances
Product multi-function combination device model
Two-speed control and protection switching appliances
Three-speed control and protection switching appliances
Reversible control and protection switching appliances
Star-delta pressure reducing starter
Starter
丨Control and protection switch丨
Ordering instructions
When ordering, the user needs to provide the following information
Detailed description of the model such as control With protection switch, frame level current, main body rated current, auxiliary
provides the power, current and voltage of the controlled motor.
If you have special requirements, please specify them in text. For example, auxiliary requirements, etc.
How to judge whether the control and protection switch you bought is a high-quality product
Look at the appearance of the mold, whether there are burrs, the size of the gap, etc. If a product even has problems with its appearance mold engraving, what can make us believe that the parts inside are of high quality
Main control module
The main control module is the soul component of the entire product! The commonly used circuit boards are produced in Yangzhou, Jiangsu. However, in order to save costs, some manufacturers use main control modules made locally in Liushi, resulting in extremely harsh control accuracy and control environment. It makes the product unstable and causes the product to trip for no reason
The identification is very simple. Qualified friends can dismantle the casing to see whether the circuit board is single layer or double layer. The single layer is inferior. The more accessories on the circuit board, the better. Of course, this is only identified with the naked eye, and the performance needs to be tested on the inspection bench
. The silver point content of the contact
The silver point used in the national standard is pure silver with a silver content. The silver content of our silver points is pure silver. Silver
With the naked eye, you can only see the thickness and gloss of the silver dots! Weighing is possible
if conditions permit. Warranty time
The current national warranty time is one month. If a manufacturer can provide free replacements and unconditional returns every month, then it is trustworthy. If it cannot be achieved, it is basically an inferior product, that is, the manufacturer promises a one-month warranty, and then various problems arise and the time and cost of replacement are 丨Control and protection switches丨
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