Molded case circuit breakers (MCCB) are key components in power distribution networks, providing protection against short circuits and overloads. Understanding the various parameters within the MCCB enclosure is essential to ensure proper operation and safety of the electrical system.
The rated voltage Ue is the system voltage, which is 5% higher than the nominal voltage at the electrical load. The plastic case circuit breaker is designed to operate with a rated impulse withstand voltage Uimp=12KV and a rated insulation voltage Ui 400V. It should be noted that the distribution network voltage should not exceed the rated insulation voltage Ui to prevent any potential danger.
The current rating of 125 Amp represents the maximum current carrying capacity of the MCCB. In addition, the instantaneous operating current parameter Ii of the magnetic release is 10In, where In is 10 times the rated current (1250A), ensuring fast and effective action under short circuit conditions.
On the right side of the molded case circuit breaker shell, the rated limit short-circuit segmenting capacity Icu=35KA and the rated operating short-circuit breaking capacity Ics=22KA demonstrate the ability of the molded case circuit breaker to handle short-circuit situations without affecting safety. MCCB is designed to have a working environment temperature range of -5°C to 40°C and a frequency of 50/60 Hz, making it suitable for various environmental conditions.
In addition, MCCB complies with production standards IEC/EN60947-2, ensuring compliance with quality and safety regulations. This standardization emphasizes the reliability and performance of MCCB, giving users peace of mind about its operational efficiency and long-term durability.
In summary, understanding the parameters within the MCCB enclosure is critical to selecting the correct circuit protection device for the electrical system. With its robust design and compliance with production standards, MCCB ensures safe and reliable operation in a variety of applications.
Post time: Jan-04-2024
