XUW2 Air Circuit Breaker
Scope of application
XUW2 Air Circuit Breaker, ACB (hereinafter referred to as circuit breaker) is suitable for distribution network with AC 50Hz, rated voltage to 660V (690V) and below, the rated current 630A~6300A, used to distribute power and protect line and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. Air Circuit Breaker have intelligent protection function, selective protection is precise, can improve power supply reliability and avoid unnecessary power outages. At the same time, it has an open communication interface to carry out "Four Remotes" to meet the requirements of the control center and automation system. The circuit breaker has an impulse withstand voltage of 8000V at 2000 meters (revised at different altitudes, not exceeding 12000V). The acb air circuit breaker are not equipped with intelligent controller and sensor, and can be used as isolator.
XUCKY is a professional air circuit breaker manufacturers The acb air circuit breaker meets the GB14048.2 "Low-voltage switchgear and controlgear Low-voltage circuit breakers" and IEC60947-2 "Low-voltage switchgear and controlgear circuit breakers" and other standards.
Model and meaning
● Classification
According to the installation method: fixed type, drawer type.
According to the poles: three poles, four poles. According to the operating mode: electric operation, manual operation (overhaul, maintenance).
● Release type
Intelligent controller, under-voltage transient (or delay) release, shunt release.
● Intelligent controller performance
a. The intelligent controller of Air Circuit Breaker is divided into: bse5 (H type: communication), bse4 (M type: common intelligent type), bse3 (L type: economic type);
b. With overload long delay inverse time limit, short delay inverse time limit, definite time limit, instantaneous function. Users can set their own required protection characteristics;
c. Single-phase grounding protection function;
d. Display function: setting current display, operating current display, main display of each phase voltage (voltage display should be put forward when ordering);
e. Alarm function: overload alarm;
f. Self-check function: overheating self-check, microcomputer self-diagnosis;
g. Test function: Test the operating characteristics of the controller.
Normal working conditions and installation conditions
● Ambient air temperature: The upper limit value does not exceed +40°C, the lower limit value is not less than -5°C, and the average value in 24h does not exceed +35°C. Note: The working condition is that lower limit value is -10°C or -25°C, the user should declare with the company; The upper limit exceeds +40°C or the lower limit is lower than -10°C or -25°C working conditions, users should consult with the company.
● The altitude of the installation site does not exceed 2000m.
● Atmospheric conditions of Air Circuit Breaker: Atmospheric relative humidity does not exceed 50% when the ambient air is +40°C. It can have relatively high relative humidity at lower temperatures. The monthly average maximum relative humidity of the wetest month is 90%. The average minimum temperature is +25°C and consider the condensation that occurs on the product surface due to temperature changes. Exceed the required requirements and consult with the company.
● Protection level: IP30
● Pollution level: III
● Use category: Class B or Class A
● Installation category: acb air circuit breaker and undervoltage release with rated operating voltage of 660V (690V) or less. The primary coil of the power transformer is used for installation category IV. The installation category of the auxiliary circuit and control circuit is III.
● Installation conditions: The circuit breaker shall be installed in accordance with the requirements of this manual. The vertical inclination of the circuit breaker shall not exceed 5° (the inclination of the mine circuit breaker shall not exceed 15°).
