Type:Air Poles Number:3 or 4 Rated current:630-6300A Rated frequency:50Hz
Universal circuit breakers, also known as frame circuit breakers, are mechanical switches that can switch on, carry, and break current under normal circuit conditions, and can also switch on, carry a certain time, and break current under specified abnormal circuit conditions. Appliances. Universal circuit breakers are used to distribute electrical energy and to protect circuits and power equipment from overload, undervoltage, and short circuits.
This circuit breaker generally has a steel frame, and all components are installed in the frame. It has a large capacity, can be equipped with a multi-function trip unit and more auxiliary contacts, and has high segmentation ability and thermal stability, so it is often used in places requiring high breaking capacity and selective protection.
Intelligent universal circuit breaker is suitable for AC 50Hz, rated voltage 380V, 660V, rated current 200A-6300A in the power distribution network. It is mainly used to distribute electrical energy and protect lines and power equipment from overload, undervoltage, short circuit, single phase. Hazards such as ground faults, this circuit breaker has a variety of intelligent protection functions, which can achieve selective protection, accurate action, avoid unnecessary power outages, and improve power supply reliability. Under normal conditions, it can be used for infrequent switching of lines. Circuit breakers below 1250A can be used to protect motors against overload and short circuits in networks with AC 380V and 50Hz voltage. Under normal conditions, it can also be used for infrequent starting of the motor.
1. The upper limit of ambient air temperature does not exceed + 40 ° C, the lower limit is not lower than -5 ° C, and the average value of 24h does not exceed + 35 ° C.
2. The installation site does not exceed 2000m above sea level.
3. Atmospheric relative humidity does not exceed 50% when the ambient air temperature is + 40 ° C; higher relative humidity may be available at lower temperatures; the monthly average maximum relative humidity of the wettest month is 90%, and the month of the month The average minimum temperature is + 25 ° C, and takes into account the frost on the product surface due to temperature changes.
4. Pollution level: Level 3
5. Installation conditions: can be installed vertically or horizontally
6. Installation category: The main circuit of the circuit breaker and the under-voltage venting air, the installation category of the primary coil of the power transformer is IV, and the installation category of the remaining auxiliary circuits and control circuits is category III.
1. Divide by purpose a. Power distribution b. Protecting motors
2. Select protection performance by selection a. Selection type b. Non-selective
3. Divided by transmission a. Handle direct drive (front center handle direct drive and side handle direct drive, rated working voltage 1140V only for side) b. Electromagnet transmission
4. According to the type of release a. With overcurrent release 脱 b. With overcurrent release and shunt release c. With over-current release and under-voltage instantaneous (or delayed) release） d. With over-current release, under-voltage instantaneous (or time-delay) release and shunt puller
5. Divided by the type of overcurrent protection a. Short-circuit instantaneous action b. Long overload delay, short-circuit short delay and instantaneous action of large short circuit
6. Divided by the type of undervoltage protection a.Under-voltage instantaneous action b. Undervoltage delay action 延时
7. Dividing according to the way in and out of the main circuit a. In and out line after board (horizontal in and out line) b. Board forward and out line (vertical in and out line) c. Board forward line, rear board outlet (horizontal outlet, vertical outlet) d. Out of the board, forward of the board (vertical outlet, horizontal outlet)