YLM50Z series intelligent Moulded Case Circuit Breaker (Hereafter be referred to as the circuit breaker) is a new circuit breaker designed and developed by the company using the international vanguard technology design on the basis of YLM50 product and applies to exchanges 50Hz, fixed isolation voltage 690V, fixed working voltage 660V (690V) and below, nominal current 250A to 800A low pressure electrical network.
Because the circuit breaker has the intellectualized trip, not only does it increase the nominal current choice scope, has overloads the long time delay inverse time lag, short-circuits the short time delay inverse time lag, instantaneous short circuit limit time three sections of protections, and overloads the long time delay and short-circuits the short time-lag action time to be possible to establish voluntarily by the user.
The circuit breaker has three sections of protections besides the intelligent trip, but also has owes the voltage protection.
It is loaded with the electromagnetism tripping short circuit transient behavior reserve protection, causes the product to be safer and more reliable.
Five kind of tripping characteristic choice: The user may carry on the establishment and the adjustment according to the load current request to the trip; The electronic trip provides the energy by circuit breaker oneself, the electric current signal and the control supply come from the installment in circuit breaker's ring-like current transformer.
The pre-warning to instruct: When the circuit breaker has the load current through, and work correctly, the light emitter diode instruction on the circuit breaker surface covers is a green; When the load current surpasses the preinstall magnitude of current, the light emitter diode instruction on the circuit breaker surface covers is yellow; When the load current surpasses two time of installation magnitudes of current, light emitter diode instruction of the circuit breaker surface covers is red.
The external dimensions are the same with YLM50Z series intelligent Moulded Case Circuit Breaker and the installment has the interchangeability. The installment is interchangeable.
Types of installation: The vertical installment (sets upright attire) or the level installment (horizontal attire).
This circuit breaker conforms to standards IEC60947-1, IEC60947-2, GB/T14048.1, GB14048.2.and so on.
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; in places where there is no heavy rain or snow.
5. The pollution degree is 3;
6 installation categoryⅢ;
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