Product Overview:
The ML7-63 series miniature circuit breaker (hereinafter referred to as the circuit breaker) is a new product developed by our company Bai Xing. This product has reliable performance, precise protection characteristics, high breaking ability, and small size, making it the latest product in the 21st century.
Circuit breakers are suitable for overcurrent protection of power line facilities and electrical equipment in buildings and similar places with AC 5OHz, rated voltage 23OV/4O0V, and rated working current not exceeding 63A. They can also be used for infrequent on-off operations.
This circuit breaker complies with the requirements of standards such as IEC6O898 and GB10963 "Overcurrent Protection Circuit Breakers for Household and Similar Places". Obtained electrical product safety certification.

ML7-63 series miniature circuit breaker
Product features
Distribution panels and control systems that have passed type testing according to IEC 439-1 and EN 60 439-1
Form inspection of distribution panel components IEC 439-1
Air gap and creepage distance DIN VDE 0110 III/3
Flammability characteristics - Hot rod test DIN VDE 6304-3-IIb
Standard DIN VDE 0471-2 for fire resistance test (hot wire test) of electrical products (modules and components)
Seismic and adjustment test grade RK1.0/10
Electrical parameters
Shell level rated current Inm: 63A
Rated voltage Ue: 50HZ, 230V/400V
Rated current In: B type, C type: l, 2, 4, 6, lO, 2O, 25, 32, 40, 5O, 63 A
D-type: 1, 2, 4, 6, 10, 20, 25, 32, 40 A
Rated ultimate short-circuit breaking capacity ICn: l0O00 A
Rated operating short-circuit breaking capacity ICS: 7500 A
Polar numbers: 1P, lP+N, 2P, 3P, 3P+N, 4P
Mechanical lifespan: 2000O cycles
Electrical lifespan: 8000 cycles
Types and current range of instantaneous release devices:
Type B: 3In-5In
Type C: 5In-10In
D-type: 10In to 5OIn
More reliable structural design

The ML7-63 series miniature circuit breaker adopts high-precision bimetallic material as the inverse time thermal protection element, with precise protection characteristics; The operating mechanism is a four-bar linkage mechanism with low operating force, high sensitivity, and a secure fit; The instantaneous release electromagnet has fine grading, lightweight moving iron core, small inertia, fast response, high sensitivity, and no jamming phenomenon due to the use of an internal structure, greatly improving the reliability of the whole machine; The moving contact has changed from the conventional beam type to a vertical beam type, increasing stiffness and ensuring the closing force of the contact under hot conditions. The moving contact has a smaller body size and lower inertia, ensuring the speed of movement after the moving contact is disconnected, which is conducive to the rapid transfer of the arc; The circuit breaker adopts a large arc extinguishing chamber, and the arc movement trajectory is connected by a large arc iron arc starting plate, reducing the negative force of arc movement and preventing the arc from stopping halfway. There are many iron grids (13 pieces), and the arc is quickly cut, cooled, and extinguished. The arc nozzle adopts multi-layer mesh iron grids to further cool and extinguish the arc, basically ensuring zero arcing and effectively preventing arc short circuits between the anode and cathode; The two sides of the arc chamber are protected by special organic materials, which generate a large amount of insulation vapor at the high temperature of the arc, further increasing the pressure around the arc root and effectively controlling the direction of the metal vapor jet emitted from the electrode. The gas generated by the insulation also cools the arc column, increasing the arc resistance and voltage, providing strong guarantee for the rapid extinguishing of the arc. The insulation materials on both sides also effectively prevent arc damage to the shell, ensuring the high insulation performance of the product.

The ML7-63 series miniature circuit breaker cleverly sets an RJ threshold for the closing force of the operating handle in products with higher rated current levels (5 O A and above), which can only be operated when
Only when the working force reaches a certain value can the contact be closed, and the contact can be closed at a certain high speed, which relatively eliminates the influence of human factors on the contact closing speed, reduces the electrical wear of the contact during connection, and improves the life and reliability of the circuit breaker. The comprehensive effects of various characteristics of circuit breakers include good current limiting characteristics, extremely short arc time, long service life, and reliable performance.

The ML7-63 series miniature circuit breaker has a clear indication of the contact position status.
Due to the rationality of its structural design, the direction of the power supply inlet can be arbitrarily selected.
The wiring terminal adopts a frame structure, which can securely connect both soft and hard wires. The accessories of the circuit breaker are complete, including auxiliary contacts, alarm contacts, shunt release, undervoltage release, and residual current action protection module, which provides great convenience for intelligent applications.
Working and environmental conditions
The upper limit of the surrounding air temperature shall not exceed+40 ℃, the lower limit shall not be lower than -5 ℃, and the 24-hour average value shall not exceed+35 ℃.
The altitude of the installation site shall not exceed 200 meters.
The relative humidity of the atmosphere at the installation site shall not exceed 50% at the highest temperature around+4 O ℃, and may have higher relative humidity at lower temperatures. The average maximum relative humidity in the wettest month shall not exceed 90%; At the same time, the average minimum temperature for the month shall not exceed+25 ℃, taking into account the condensation that occurs on the surface of the product due to temperature changes.
Pollution level 2.