The Chint Circuit Breaker is high quality!
The rated limit short circuit breaking capacity Icu kA 65
The rated operating short circuit breaking capacity Ics kA 32.5
Flying arc distance (mm) ≤100
Mechanical life (times) 4000
Electrical life (times) 1000
NM1LE series residual current operated circuit breaker (hereinafter referred to as residual current
operated circuit breaker) is one of the new residual current operated circuit breakers designed and
developed by our company with international advanced technology. It is suitable for circuits with AC
50Hz, rated voltage to 400V and rated current of 16A to 800A A.
Its main function is to provide indirect contact protection for fatal personal electric shock. Residual
current operated circuit breakers with rated residual operating current not exceeding 30mA can also be
used as supplementary protection for direct contact when other protection measures fail, but cannot be
used as the only direct contact protection. At the same time, it can also be used to prevent electrical
fire caused by contact with fault current. It can be used to protect the overload and short circuit of
the line, and can also be used for infrequent switching of the line.
The residual current operated circuit breaker has the advantages of small size (equal to that of the
corresponding molded case circuit breaker), high breaking height, short arcing and residual operating
current, and can be equipped with alarm contacts, shunt release, under-voltage release, auxiliary
contacts, rotating handle operating mechanism, electric operating mechanism and other accessories,
and can adopt various wiring modes such as front board, back board and plug-in, which is an ideal
product for users.
Residual current operated circuit breakers can be installed vertically (i.e. vertically) or horizontally
(i.e. horizontally).
There are four types of neutral pole (n) of four-pole circuit breaker:
Type a: the n pole is not equipped with overcurrent tripping element, and the n pole is always on, and
does not close with other three poles;
Type b: the n pole is not equipped with overcurrent tripping element, and the n pole is closed and divided
together with other three poles (the n pole is closed first and then divided);
Type c: the n pole is equipped with an overcurrent tripping element, and the n pole is closed and divided
together with the other three poles (the n pole is closed first and then divided);
Type d: the n pole is equipped with overcurrent tripping element, and the n pole is always on, and does not
open or close with other three poles.
Normal working conditions and installation conditions
Ambient air temperature
The upper limit of ambient air temperature is+40℃;
The lower limit of ambient air temperature is-5℃;
The average value of ambient air temperature within 24h shall not exceed +35℃.
Elevation: the elevation of the installation site shall not exceed 2000m.
Pollution level: 3.
Installation category: ⅲ.
Atmospheric conditions: the relative humidity of the atmosphere shall not exceed 50% when the ambient
air temperature is +40℃; It can have higher relative humidity at lower temperature;
The monthly average maximum relative humidity in the wettest month is 90%, and the monthly average minimum
temperature in this month is +20℃, taking into account the condensation on the product surface due to temperature change.
External magnetic field: the external magnetic field near the installation site of residual current operated
circuit breaker shall not exceed 5 times of the earth magnetic field in any direction.
NM1LE - 125 H P / 3 3 10 2 100A 30mA 0.4s AC230V AC230VAC230V
NM1LE: Type characteristic NM1LE residual current operated circuit breaker
125: rated current codes of shell frame level are 125A, 250A, 400A, 630A and 800A
H: breaking ability characteristic code s standard type h higher type
P: operation mode code handle direct operation no code p electric operation z rotating handle operation
3. Number of poles 2 poles 3 poles 4 poles
3: Name of Release 2 Electromagnetic Release 3 Thermomagnetic Release
10: attachment 00 has no attachment
08 alarm contact
10 shunt trip
20 auxiliary contacts
28 auxiliary contacts,
Alarm contact
30 Undervoltage Release
40 shunt trip
Auxiliary contact
48 shunt trip
Auxiliary head
Alarm contact
60 Two sets of auxiliary contacts
70 Undervoltage Release
Auxiliary contact
68 Two sets of auxiliary contacts
Alarm contact
2: No code for power distribution, 2 for motor protection
100A: rated current (A) 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 180, 200, 225, 250, 315, 350, 400, 500, 630
30mA: rated residual operating current (mA) ordinary type 30, 50, 100, 200, 300, 500
Adjustable code 30, 50, 100
50、100、200
50、200、300
100、200、300
100、300、500
200、300、500
300、500
0.4s: breaking time (s) common code 0.1 0.2 delayed code 0.3 0.4 0.5
AC230V: rated voltage of electric operating mechanism AC230V AC400V DC230V
AC230V: rated voltage of shunt trip AC230V AC230V AC400V DC230V DC240V
AC230V: undervoltage release AC230V AC400V
Example: NM1LE-125h/431063a 50ma0.4s ac230v represents nm1le-125 residual current operated circuit breaker for distribution protection, with rated current of 125A at shell level.
Current 63A, high breaking capacity, quadrupole, rated residual operating current 50mA, delay type, breaking time < ＜0.4s, thermomagnetic release with shunt release (AC230V).
Selection, installation and use shall conform to the product instruction manual or relevant national standards.