CD Automation CD3000E 2ph 280-700A power regulator

CD Automation CD3000E 2ph 280-700A power regulator

Brand: CD Automation

Origin: Italy

Brand Description: Since 1987, CD Automation has been providing thyristor units - SCR, static relays, soft starters, and high-quality temperature regulators for the industrial automation field. One of the factors contributing to success is building a sales team with a strong technical background to collaborate with customers in finding the best solutions. Italian CD Automation products include controllers, starters, relays, and are widely used in textiles, plastics, microwave ovens, and other industries.

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CD Automation CD3000E 2ph 280-700A power regulator

Shandong Sailite's main products include various sensors, hydraulic and pneumatic components, optical detection equipment, analytical instruments, experimental equipment, electrical equipment and components, brake transmission components, machines, tools, etc.

Industrial Knowledge

Self healing fuse: using sodium metal as the melt, it has high conductivity at room temperature. When a short circuit fault occurs in the circuit, the short-circuit current generates high temperature, causing sodium to rapidly vaporize, and the vaporized sodium exhibits a high resistance state, thereby limiting the short-circuit current. After the short-circuit current disappears, the temperature drops and the metallic sodium returns to its original good conductivity. Self resetting fuses can only limit short-circuit current and cannot truly break the circuit. Its advantage is that there is no need to replace the melt and it can be reused.

Fuse:

1. The main advantages and characteristics of fuses

① Good selectivity. As long as the rated current of the fuse link of the upper and lower level fuses meets the requirement of the overcurrent selection ratio of 1.6:1 specified in the national standard and IEC standard, that is, the rated current of the upper level fuse link is not less than 1.6 times that of the lower level, it is considered that the upper and lower levels can selectively cut off the fault current;

② Good current limiting characteristics and high breaking capacity;

③ Relatively small size;

④ The price is relatively cheap.

2. The main drawbacks and weaknesses of fuses

① After the fault is blown, the fuse link must be replaced;

② The protection function is single, with only one overcurrent inverse time characteristic, which is used for overload, short circuit, and grounding faults;

③ When a phase fuse occurs, it will cause adverse consequences for the operation of two phases in a three-phase motor. Of course, a fuse with an alarm signal can be used to compensate for this. A phase fuse can disconnect three phases;

④ Remote control cannot be achieved, it needs to be combined with an electric knife switch.

Non selective circuit breaker:

1. Main advantages and characteristics

① After the fault is disconnected, it can be manually reset without the need to replace components, unless maintenance is required after cutting off the large short-circuit current;

② Long delay release and instantaneous current release with inverse time characteristics have two protection functions, which are used for overload and short circuit protection respectively, and each performs its own duties;

③ Remote control can be achieved when operating the mechanism with electricity.

2. Main drawbacks and weaknesses

① It is difficult to achieve selective disconnection between upper and lower level non selective circuit breakers, and when the fault current is large, it is easy to cause both upper and lower level circuit breakers to instantly disconnect;

② The relative price is slightly higher;

③ Some circuit breakers have lower breaking capacity, such as those with lower rated current installed near large capacity transformers, which may result in insufficient breaking capacity. The existing high resolution products can meet the requirements, but the price is relatively high.