Miniature circuit breaker operating conditions

Posted by elcb on April 24th, 2018

Miniature circuit breaker operating conditions 1, the ambient air temperature limit does not exceed +40 °C, the lower limit is not less than -5 °C, and the average temperature of 24h does not exceed +35 °C; Note 1: The lower limit is -10 °C or -25 °C operating conditions, the user must declare to the manufacturer at the time of ordering; Note 2: The user must consult with the manufacturer if the upper limit value exceeds +40°C or the lower limit is lower than -25°C. 2. The altitude of the installation site does not exceed 2000m; 3. Atmospheric relative humidity does not exceed 50% when the ambient air temperature is +40°C. Relative humidity may be allowed to be higher at lower temperatures, for example 90% at +20°C, occasionally due to temperature changes. Condensation should take appropriate measures; 4, pollution level: 2; 5, installation categories: Class II and Class III; 6. The external magnetic field of the installation site should not exceed 5 times of the geomagnetic field. 7, generally installed vertically, any direction of tolerance 2 °; 8. There should be no significant impact and vibration at the installation site. Miniature circuit breaker parameters 1. Rated working voltage (Ue): AC 230V/400V (1P), 400V (2P, 3P, 4P). 2. Rated insulation voltage (Ui): 600V. 3, rated impact withstand voltage (Uimp): 4KV. 4. Rated current (In): 1A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A. 5, rated short-circuit breaking capacity (Icn): 6A-40A: 6000A, 50A-63A: 4500A. 6, running short-circuit breaking capacity (Ics): 6A-40A: 6000A, 50A-63A: 4500A. 7. Number of poles: a. Unipolar (1P); b. Two poles (2P); c. Three poles (3P); d. Quadrupole (4P). 8. Instantaneous tripping type: a. Type C (5ln-10ln); b. Type D (10ln-16ln). 9, the reference environment temperature: 30 °C. 10. Grid distance (mm): 6A-40A: 50mm, 50A-63A: 45 mm. 11, shell protection grade: IP20. 12. Lifetime: a. Electrical life: no less than 4,000 times; b. Mechanical life: no less than 20,000 times. Application of miniature circuit breakers The miniature circuit breaker has the characteristics of advanced structure, reliable performance, strong breaking capacity, and beautiful appearance. It is mainly used in places with AC 50HZ or 60HZ, rated voltage below 400V and rated operating current below 63A. For overloading and short-circuit protection of lighting, distribution lines and equipment in office buildings, residential buildings and similar buildings, it can also be used for infrequent on-off operation and conversion of the line. It is mainly used in various places such as industrial, commercial, high-rise and residential houses.

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