ABB-F circuit breakers have been on the market for 30 years. They were officially delisted in 2012, but they are still widely used in the market. Due to the early delisting, they are relatively easy to use. A large number of markets, and there are still many on the market.
1. Learn about the classification and significance of ABB circuit breakers
ABB circuit breaker models are divided into 7 categories according to the national technical standards, and the corresponding model letters and numbers include the following:
1. The letter code of the product is represented by the following letters:
S—less oil circuit breaker;
D—multi-oil circuit breaker;
K—air circuit breaker;
L—Sulfur hexafluoride circuit breaker;
Z—vacuum circuit breaker;
Q—Production gas circuit breaker;
C—Magnetic blowing circuit breaker.
2. Installation location code; N—indoor, W—outdoor;
3. The serial number of the design series; represented by numbers 1, 2, 3...;
4. Rated voltage, KV;
5. Other supplementary working characteristic signs, G-improved, F-separated operation;
6. Rated current, A;
7. Rated breaking current, KA.
According to the installation current and size, it is divided into
Frame circuit breaker X1 series 630-1600A E series 630-6300A
Molded case circuit breaker S series (20-1600A) is about to be discontinued, T series 20-1600A
Miniature circuit breaker (commonly known as air switch) 0.5-63A, there are s260.s280, etc.
2. Wiring method of ABB-F circuit breaker
ABB F-type circuit breakers are divided into withdrawable and fixed types. The positions of the secondary terminals are different. The fixed type is on the right side of the switch, and the withdrawable type is behind the bottom. As shown below:
3. Energy storage of ABB-F circuit breaker
The closing and opening action of the frame type circuit breaker is carried out by the internal energy storage mechanism. The energy storage mechanism is provided with an energy storage spring, and the closing action can be completed by releasing the energy.
Frame type circuit breaker, also called frame switch, energy storage is divided into electric energy storage and manual energy storage. Whether it is electric or manual, its purpose is to allow the internal energy storage spring to accumulate energy, which is not limited by the brand.
Electric energy storage is completely automatic and requires no human intervention, as long as it is connected to a normal working power supply. Regardless of whether it is in the open or closed state, as long as the circuit breaker has no energy storage, the internal energy storage motor will immediately fill up the energy. That is to say, the frame circuit breaker is always in the state of energy storage, which is also not limited by the brand.
Sometimes, the power distribution cabinet will add a separate energy storage button, and only when the switch is ready to close, the manual energy storage is performed. The purpose of this is to meet the design needs of the site, and some to prolong the life of the energy storage spring inside the circuit breaker. The energy storage spring is in a state for a long time, which will definitely affect the stretchability, but this design is not very common. Used, the current production process has been greatly improved, and there is no need to worry about reducing the tensile properties.
The automatic energy storage of circuit breakers has many advantages, the main purpose is to achieve automatic control without manual intervention.
