- Overview of ABB miniature circuit breakers
The low-voltage terminal power distribution protection components are all installed in standard DIN rail, including ABB miniature circuit breakers with overload, short circuit and other protection functions, which are widely used in building power distribution, commercial, industrial and control in various electrical circuits and protection, and the working current does not exceed 125A, the main model series of ABB miniature circuit breakers are S200, SN201, S800 and S500.
What effect can DIN rail mounting bring?
A: It is a complete and comprehensive modular terminal component that brings a new design concept to the traditional switchboard installation mode, which can make power distribution performance, safety and stability more convenient and simple. Whether from civil or industrial, from protection to control ABB miniature circuit breakers play a key role in switchboards. In general, the shape is unified and the appearance of the power distribution cabinet is improved. All ABB modular components can be installed in different module positions on the power distribution board to perform their respective duties, even if the components of different sizes are used. Mixed installation is also feasible without affecting performance at all, and the functions are richer and more integrated, and at the same time, the installation space is greatly saved.
- ABB miniature circuit breaker model description
1）. The specific meaning and parameters of SH200 series models are shown following :
- ARVP: with self-recovery over-voltage protection
- AVM: with overvoltage and undervoltage protection
OV: with overvoltage protection
(Only applicable to some models of ABB miniature circuit breaker SH200)
- Not marked: without neutral
NA: with neutral pole
- B characteristics: 6A/10A/13A/16A/20A/25A/32A/40A/50A/63A
C/D features：0.1A/1A/2A/3A/4A/6A/8A/10A/13A/16A/20A/25A/32A/40A/50A/63A
- Tripping characteristics: B/C/D
Number of poles: 1 pole/1 pole+NA/2 poles/3 poles/3 poles+NA/4 poles
- Product series: SH200 (rated breaking capacity 6kA)
2） The specific meaning and parameters of S200 series models are shown fllowing :
- Not marked: without neutral pole
NA: Neutral pole
Rated current:/4A/5A/6A/8A/10A/13A/16A/20A/25A/32A/40A/50A/63A
- Tripping characteristics: S200 and S200M (B/C/D/K/Z), S200P (C/D)
- Rated breaking capacity: not marked (6kA), M (10kA/15kA and characteristics K and Z), P (15kA/25kA)
Number of poles: 1 pole/1 pole+NA/2 poles/3 poles/3 poles+NA/4 poles
- Product series: S200 series, M200 series
3） The specific meaning and parameters of S200 DC DC series models are shown following：
- Rated current: B (1-4A/6A/10A/16-32A), C (0.5A/1-4A/6-63A), K (0.5A/1-4A/6-63A), Z (0.5 A/1-4A/6-63A)
- Tripping characteristics: B/C/K/Z
- Dividing ability: 10kA
- Number of poles: 1/1 pole, 2/2 pole, 3/3 pole, 4/4 pole
- Structure description of ABB miniature circuit breaker
First of all, the structure and dimensions of the circuit breaker and the existing system can be completely matched with each other, which can ensure the coordination and continuity of the appearance. The accessories of ABB miniature circuit breakers are relatively complete, allowing three auxiliary contacts to be installed at the same time. At the same time, electric operating mechanism, automatic reclosing mechanism and other components are added to the original structure, which satisfies the requirements to a great extent. For the need of remote operation, the internal structure of ABB miniature circuit breaker is shown in the figure below .
The ABB circuit breaker can be removed with a special quick snap-fit design with only a slight twist, and it can be easily removed without any screwdriver tools. The absence of shoulders effectively improves the operating space and at the same time improves the wiring efficiency. In terms of wiring structure, ABB miniature circuit breakers can be connected to cables or busbars at the upper and lower ends as input terminals, and the breaking capacity will not be affected.
- ABB miniature circuit breaker performance
1) Tripping characteristics
- B feature: suitable for providing protection for resistive loads or loads without inrush current
- C characteristic: suitable for providing protection for resistive loads and relatively low inrush current inductive loads
- D characteristic: suitable for providing protection for relatively high inrush current loads when the line is connected
K characteristic: Usually, this small circuit breaker characteristic is used in motor system or transformer system to provide protection, its 1.2 times the thermal tripping operating current can be well guaranteed for line equipment, and 10-14 times the magnetic The tripping action range can also cooperate with the motor, and at the same time has a high resistance to inrush current.
- Z characteristic: suitable for protection of sensitive loads.
2) Performance factors
There are many factors that need to be considered when selecting ABB miniature circuit breakers. Will it affect its performance? If there are any of the following conditions, it should be derated.
- Ambient temperature has influence on current carrying capacity
- Consecutive side-by-side installation effects of multiple devices
- Influence of the altitude of the installation site
- The influence of the speed of the power frequency on the equipment
