Zhejiang Shendun Electric Appliance Co

丨Fire protection switch
Control and protection Zhongkai Kaibao Xinling control and protection switch electrical appliances Guojia Ouyi factory direct sales price control and protection Jiangsu Yuantai Jiangsu Kailong Shanghai Jiayi basic fire isolation pressure reducing resistor star delta leakage< br/>丨Fire protection switch
Circuit board, Suzhou Philchuangneng double-layer good single-layer difference produced in Liushi
Internal copper material, red copper, brass or even iron difference
Silver point Our company's plastic contains silver and is thick
and is divided into new materials and recycled materials
The product adopts a modular single product structure and integrates traditional circuit breakers, fuses, contactors, overload or overcurrent The main functions of phase failure protection relays, starters, isolators, etc., are remote automatic control and local direct manual control functions, panel indication and electromechanical signal alarm functions, overvoltage and undervoltage protection functions, and phase failure and phase loss protection functions. , with coordinated time current protection characteristics, it has inverse time limited time limit and instantaneous three-stage protection characteristics. By selecting functional modules or accessories as needed, you can control and protect various types of motor load distribution loads. It is mainly used in power systems with AC rated voltages to rated currents to adjustable operating currents to connect and break currents under normal conditions, including specified overload conditions, and can connect and break specified abnormal conditions such as short circuits. current below.
In terms of its structure and function, the series of products is no longer a single product such as a contactor, circuit breaker or thermal relay, but a set of control and protection systems. Its appearance fundamentally solves the problems of unreasonable control and protection coordination caused by the unreasonable selection of traditional discrete components, usually circuit breakers or fuses + contactors + overload relays. In particular, it overcomes the problems caused by the unreasonable selection of discrete components. When electrical products with different assessment standards are combined together, the protection characteristics and control characteristics are not coordinated, which greatly improves the operational reliability and continuous operation performance of the control and protection system
The series of products are circuit breakers such as The best replacement product for low-voltage electrical appliances such as contactors, thermal relays, fuses, etc., and is an upgraded product of the series.
丨Fire-fighting protection switch
Complete product models and types
Basic models of series products
Series digital fire-fighting control and protection switches
Series isolation control and protection switches< br/> Product multi-function combination device model
Two-speed control and protection switch
Three-speed control and protection switch
Reversible control and protection switch
Star-delta decompression starting Auto-coupling decompression starter
丨Fire protection switch
How to judge whether the control and protection switch you bought is a high-quality product
Look at the appearance mold to see if it exists Burrs, gap size, 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. Friends who have the conditions 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
Contact silver point content
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 various problems will arise at that time. The time and cost of replacement are working conditions
The upper limit of the ambient air temperature does not exceed + ℃
The lower limit value is not less than ℃
The daily average value is not more than +℃
When the ambient air temperature exceeds the above range, special settings must be made at the factory
Altitude of the installation site Not exceeding meters
Atmospheric conditions
Atmospheric relative humidity does not exceed when ambient air temperature +°C. Higher
relative humidity can be achieved at lower temperatures. When the monthly average minimum temperature is +℃, the average maximum relative humidity of the month is. Measures must be taken to prevent condensation on the product due to temperature changes
Pollution level
Installation category III system and IV system
The control power supply voltage should be within the fluctuation range of ~
丨Fire protection switch
Applicable places
Industrial facilities
Equipment in metallurgy, coal mines, steel, petrochemical ports, ships, railways and other fields Electric and motor protection and control systems
Motor control centers, especially intelligent electric control systems or power distribution control and protection systems that require high rated operating breaking capacity
Single motor control and protection systems
Power distribution center
Commercial and civil facilities
Electrical control and protection systems such as lighting power conversion pumps, fans, air conditioners, fire lighting, etc. in modern buildings
Remote control lighting systems.
Hospital
Information processing center, bank, municipal securities trading center, etc.
Telecommunications room
Commercial building, large shopping mall, supermarket, etc.
Infrastructure
Port or Railway systems, airports, railway passenger transportation centers, etc.
Highway lighting or ventilation systems
Military station control and protection systems such as border posts, radar stations
Fire protection systems
Fire pumps and fans for various occasions Etc.
丨Fire protection switch
New pictures, new pictures