Intelligent Functions：

a. It is equipped with multiple functions including overload long-time inverse-time delay, short-time inverse-time delay, short-time definite-time delay and instantaneous tripping. These functions can be set independently by users to form the required protection characteristics.
b. Single-phase grounding protection performance.
c. Display function: Display of setting current Ir and operating current.
d. Ammeter function: Detection of main circuit current.
e. Alarm function: Overload alarm.
f. Self-test function: Overheat protection, equivalent contact wear detection, and microcomputer self-diagnosis.
g. Test function: Testing of the operating characteristics of the release.

Purpose and Scope of Application
B2W1 Intelligent Air Circuit Breaker(hereinafter referred to as the circuit breaker)It is applicable to power distribution networks with AC 50Hz, rated voltage up to 600V (690V) and below, as well as rated current ranging from 630A to 6300A. It is designed to distribute electrical energy and protect circuits and power supply equipment against damages caused by faults such as overload, undervoltage, short circuit and single-phase grounding. Equipped with intelligent protection functions, the circuit breaker delivers precise selective protection, which enhances power supply reliability and avoids unnecessary power outages. Meanwhile, it is provided with an open communication interface that supports the four remote control functions (remote measurement, remote signaling, remote control, and remote adjustment), meeting the requirements of control centers and automation systems. At an altitude of 2000 meters, the impulse withstand voltage of the circuit breaker is 8000V (values shall be corrected according to standards for different altitudes, with the maximum voltage not exceeding 12000V). Without the intelligent controller and sensors, the circuit breaker can be used as an isolator, which shall be marked as follows:
The circuit breaker complies with standards such as GB 14048.2 Low-voltage Switchgear and Controlgear - Low-voltage Circuit Breakers and IEC 60947-2 Low-voltage Switchgear and Controlgear - Circuit Breakers.
Model Designation and Interpretation

Normal Operating and Installation Conditions
● Ambient Air Temperature
Upper limit: not exceeding +40℃
Lower limit: not less than -5℃
24-hour average value: not exceeding 35℃
Note:
For operating conditions where the lower limit is -10℃ or -25℃, the user shall declare this to our company.
For operating conditions where the upper limit exceeds +40℃ or the lower limit is lower than -10℃ or -25℃, the user shall consult with our company.
The altitude of the installation site shall not exceed 2000 m.
● Atmospheric Conditions
The relative atmospheric humidity shall not exceed 50% when the ambient air temperature is +40℃. Higher relative humidity is permissible at lower temperatures. The monthly average maximum relative humidity of the wettest month shall be 90%, while the monthly average minimum temperature of the same month shall be +25℃. Condensation on the product surface caused by temperature changes shall be taken into account. Any deviation from the specified requirements shall be consulted with our company.
● Protection Class: IP30
● Pollution Degree: II
● Application Category: Category B or Category A
● Installation Category
Circuit breakers with a rated operating voltage of 660V (690V) and below, as well as undervoltage releases and primary coils of power transformers, shall be used for Installation Category IV.
Auxiliary circuits and control circuits shall be for Installation Category II.
● Installation Conditions
The circuit breaker shall be installed in accordance with the requirements of this instruction manual. The vertical inclination of the circuit breaker shall not exceed 5 degrees (the inclination of mining-type circuit breakers shall not exceed 15 degrees).