YLM50 series moulded case circuit breaker adopts major technique performance which achieves the 90s international advanced level. It has compact structure, small volume, high short circuit breaking capacity, non arc over, Internal supplementary installation modulation installment, using post safety mask, the zoom type trip strengthen the security, as well as “the foundation”, “the lap” in different colors which make it more artistic.
This series circuit breaker’s moving contact, breakback contact and feeler lever (junction plate) which are designed to be parallel make full use of electrically operated repulsion which has not reached maximum to part the moving contact, breakback contact and limit flame current enlargement.
In addition, it adopts the technology of setting aromatic insulation material electric which is released when the arc is scalding hot to absorb electric arc energy, cool electric arc, reduce the arc stream and weaken the backward spraying of Electric arc. At the same time, using arc-control device which can make the arcing gas dissociation to cause its reduction to zero. The application of the new measure enormously enhance circuit breaker's short circuit breaking capacity, reduces the complete set electric appliance's volume. The installment of supplementary installation's modular insertion and safety mask which provides the post, as well as the zoom type trip, had guaranteed security and reliability of the circuit breaker.
YLM50 series moulded case circuit breaker (Hereafter to be referred as the circuit breaker) which is suitable in exchanges 50Hz (or 60Hz), fixed isolation voltage 690V, fixed working voltage 660V and below, directs current 250V and below, in the nominal current 12.5-800A electric circuit, is used to assign the electrical energy, while in normal condition mean infrequent closed and separation, and when the line and the equipment overload, the short circuit and owes the voltage the protective function. Circuit breakers whose fixed shell rank electric current in 400A and below make the mouse cage type electric motor start infrequently, interrupt revolution and when the electric motor overloads, the short circuit and owes the voltage play the protective function.
The circuit breakers are divided into S (standard type), M (high breaking), H (high breaking) according to its fixed limit breaking capacity.
The circuit breaker has the isolation function
Types of installation: The vertical installment (sets upright attire) or the level installment (horizontal attire).
Circuit breakers meet standards: IEC60947-2, GB14048.2
Suitable application environments and installation conditions:
1. Installation site: The altitude above sea level that does not surpass 2000m;
2. the surrounding air temperature is not higher than +40℃ and is not lower than - 5℃, mean value of 24hours does not surpass +35℃, if the ambient temperature achieves +70℃, please explain in ordering;
3. atmospheric condition: Atmospheric relative humidity may have the high relative humidity under the low temperature when surrounding air temperature for +40℃ does not surpass 50%, the wettest month's monthly mean maximum relative humidity is 90%, simultaneously this month equally the lowest temperature for +25℃, and considered occurs because of the temperature change on the product surface congeals the dew;
4 in non-explosion hazard medium, and the medium does not have sufficiently the dipping and the destruction insulation gas and the electric conduction dust place;
5. places where there is no heavy snow or rain
6. The pollution degree is 3;
7 installation categoryⅢ;
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