Views: 0 Author: Site Editor Publish Time: 2022-07-19 Origin: Site
Miniature circuit breakers are suitable for overload and short circuit protection of AC 50/60Hz rated voltage 230/400V, rated current up to 63A lines, and can also be used for infrequent operation conversion of lines under normal conditions. Miniature circuit breakers are mainly used in various places such as industrial, commercial, high-rise and residential buildings.
What are the electrical parameters of the Miniature circuit breaker?
What are the mechanical parameters of the Miniature circuit breaker?
How to judge whether we want to choose a molded case circuit breaker or a Miniature circuit breaker?
a. In line with electrical standards: IEC60898-1、GB/T 10963.1;
b. Rated voltage (Ue): 230/400V; 50/60Hz;
c. Rated short-circuit breaking capacity Icu: 10kA IEC898 (1~63A);
d. Tripping characteristics: B, C, D characteristic curves
e. Selective level: 3
f. Working temperature: -5 to +40℃
g. Shell protection grade: IP40 (after installation)
h. Life: electrical, no less than 8000 on-off actions
a. Length of exposed surface: 45mm
b. Shell height: 80mm
c. Shell width: 17.5mm per pole (single pole)
d. Installation method: adopt IEC standard guide rail 35mm
e. Terminal form: dual-purpose terminals can be connected to busbars and wires
f. Terminal wiring capacity: busbar 1-25mm2; busbar thickness 0.8-2mm
Both case circuit breakers and Miniature circuit breakers need to comply with some basic product standards and have the same working principle. Next, let's talk about the difference between the two. Generally speaking, there are the following points:
1. Different electrical parameters
2. Different mechanical parameters
3. Different working environments.
From the point of view of purchase, let's talk about the difference between several case circuit breakers and Miniature circuit breakers. In terms of current level, the current level of molded case circuit breakers is up to 2000A, while the maximum current level of Miniature circuit breakers is within 125A. Due to the difference in capacity between the two, in the specific work, the effective area of the molded case circuit breaker is also larger than that of the Miniature circuit breaker, and the wires connected to it are also relatively thick, which can reach more than 35 square meters, while the Miniature circuit breaker is only suitable for connecting 10 wire below the square. Therefore, for indoor conditions, it is more suitable to choose molded case circuit breakers for larger rooms.
From the installation method, the molded case circuit breaker is mainly installed with screws, which are easy to press, have good contact and stable operation. The Miniature circuit breaker is mainly installed through the guide rail, and sometimes the contact is poor due to insufficient torque. Due to the different installation methods of the two, the installation of the molded case circuit breaker is more stable and less difficult than the Miniature circuit breaker.
Zhejiang Shilong Electric Technology Co., Ltd. has been a trustworthy supplier in the Miniature circuit breaker area for many years. You will get the best quality products and the most intimate after-sales service which is beyond your imagination.
