¡El Chint Circuit Breaker es de alta calidad!
Breaking ability characteristic code S H R
¡El rated limit short circuit breaking capacity (kA rms) Icu
AC 380/400V 50 70 100
AC 660/690V 8 10 15
¡El rated running short circuit breaking capacity Ics= (%Icu)100
Use category a.
Life (C-O cycle) Mechanical 20000 Electrical 400V In 10000
NM8 series plastic case circuit breaker (hereinafter referred to as circuit breaker) is a new product developed
by our company. Its design embodies the latest current limiting principle and manufacturing technology, and has
the characteristics of small size, compactness, modularization, high breaking, zero arcing and environmental
protection.
Circuit breaker is suitable for AC 50Hz, rated voltage 690V and below, and rated voltage 500V and DC system
, rated current to 1250A and below the circuit for switching on, breaking and carrying the rated current,
and can be in line and electrical equipment overload, short circuit, under-voltage cases of reliable
protection of lines and electrical equipment. It can also be used as protection for infrequent starting
and overload, short circuit and undervoltage of motor.
Circuit breakers can be installed vertically (that is, vertically) and horizontally (that is, horizontally);
You can also drop the line (applicable to
NM8-125, 250, 630 and NM8S-100, 250, 630).
With isolation function
Normal working conditions and installation conditions
Ambient air temperature
¡El upper limit of ambient air temperature is +40℃, the lower limit is -5℃, and the average temperature
within 24h does not exceed +35℃.
altitude
¡El altitude of the installation site shall not exceed 2000m.
atmospheric conditions
Humidity
¡El relative humidity of the atmosphere should not exceed 50% when the ambient air temperature is +40℃,
and it can be higher at lower temperature
Relative humidity, the monthly average maximum relative humidity in the wettest month is 90%. It should
be considered that the temperature change occurs on the surface of the product
On the condensation.
class of pollution
¡El pollution level is Grade 3.
4P products only provide breaking ability s and h types;
¡El rated working current of NM8-630 thermomagnetic circuit breaker is 500A；;
¡El rated working current of NM8S-630 plug-in type is 570A
NM8S - 250 H / 160/ 4C / M
NM8S: product model and release type NM8: standard type with thermomagnetic release
NM8S: intelligent instant intelligent release
250: rated current of shell frame class 100 250 630 1250
H: breaking capacity characteristic code s: standard type h: higher type r: current limiting type
160: rated current 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 180, 200, 225, 250, 315, 350, 400, 500, 630, 700, 630
4C: pole number 1 means 1 pole
2 represents 2 poles;
3 represents 3 poles;
4 represents 4 poles;
4A indicates that the N pole is not equipped with an overcurrent release element, and the N pole is always on;
4B indicates that the N pole is not equipped with an overcurrent trip element, and the N pole is closed and
divided together with the other three poles;
4C indicates that the N pole is equipped with an overcurrent tripping element, and the N pole and the other
three poles are closed and divided together
¡El action current is 1.0In；;
4D indicates that the N pole is equipped with an overcurrent tripping element, and the N pole is always on,
and the operating current is 1.0In；;
M:M: No code for motor protection: power distribution protection