M-NZM series plastic shell circuit breakerDetailed product description：

Purpose and Scope of Application
The M-NZM series plastic shell circuit breaker (hereinafter referred to as the circuit breaker) is one of the new circuit breakers developed and researched by our company using international advanced design and manufacturing technology. Its rated insulation voltage is 800V (M-NZM1-63 is 500V), suitable for circuits with AC 50Hz, rated working voltage below 690V (M-NZM1-63 is 400V), and rated working current up to 800A for infrequent switching and motor starting. Circuit breakers have overload, short circuit, and undervoltage protection functions, which can protect circuits and power equipment from damage.
Circuit breakers are classified into three types based on their rated ultimate short-circuit breaking capacity (LCU): N-type (standard type), H-type (higher breaking type), and L-type (high breaking type). This circuit breaker has the advantages of small size, high breaking height, short arcing (some specifications have zero arcing), and anti vibration, making it an ideal product for land and ship use.

Model and meaning of M-NZM series plastic shell circuit breaker


Note:
1) Circuit breakers for power distribution have no code; The circuit breaker for protecting the motor is represented by 2.
2) The handle can be operated directly without a code; Electric operation is represented by P; Rotate the handle and use Z to indicate.
Applicable working environment
Altitude of 2000m and below;
The temperature of the surrounding medium should not exceed+40oC (+45oC for marine products)
And not less than -5oC;
Can withstand the influence of humid air;
Capable of withstanding the effects of salt spray and oil spray;
The maximum tilt is ± 25.5o;
Can work reliably under normal ship vibration;
Can work reliably under earthquake conditions (4g);
In non explosive media, there is no medium that can corrode metals
Places where insulating gases and conductive dust are damaged;
In a place without rain or snow invasion.




Release mechanism and accessory code


Release mechanism and internal accessory code



Note:
200: Refers to the circuit breaker body with only electromagnetic release; 300: Refers to a circuit breaker body with a thermal electromagnetic release; 000: The body of a circuit breaker without a release.
For M-NZM2-100 and M-NZM3-225 bipolar products, only 210, 310, 220, 320, 230, and 330 are available; M-NZM2-100, M-NZM3-160, 225 quadrupole
Circuit breakers without 218, 318, 248, 348, and without 240, 340, 260, 360, 268, 368 when the N pole is of type A and D;
The auxiliary contacts in specifications 248, 348, 278, and 378 of M-NZM4-400, M-NZM6-630, and M-NZM6-800 are a pair of contacts (i.e., one normally open and one normally closed),
The auxiliary contacts in specifications 268 and 368 are three pairs of contacts (i.e. three normally open and three normally closed).

The cross-sectional area of the connecting wire and the corresponding rated current

Rated current value (A)

ten

16,20

twenty-five

thirty-two

40,50

sixty-three

eighty

one hundred

one hundred and twenty-five

one hundred and sixty

18,200,225

two hundred and fifty

315,350

four hundred

Wire cross-sectional area (mm)two）

one point five

two point five

four

six

ten

sixteen

twenty-five

thirty-five

fifty

seventy

ninety-five

one hundred and twenty

one hundred and eighty

two hundred and forty

Rated current value (A)	Cable		Copper bar
	Cross sectional area (mm)two）	quantity	Size (mm x mm)	quantity
five hundred	one hundred and fifty	two	30x5	two
six hundred and thirty	one hundred and eighty-five	two	40x5	two
700,800	two hundred	two	40x5	two

Internal and external attachments
Internal accessories of circuit breaker
According to the user's needs, the circuit breaker accessories can be directly wired or equipped with wiring terminals.
1. Undervoltage release device
There are three types of undervoltage release devices:
Type A: One specification with five voltage levels: AC50Hz 110V 230V 400V;
DC 110V 220V
Type B: (three-phase protection) One specification: AC50Hz 400V
Type C: Two specifications: AC50Hz 230V or 400V
Wiring diagram (internal accessories of the switch are shown in the dashed box)



When the rated working voltage is 70%~35%, the undervoltage release should reliably trip the circuit breaker. Warning: The undervoltage release must be powered on before the circuit breaker can be tripped and closed. Otherwise, it will damage the circuit breaker!

Rated current value (A)	Undervoltage release power (W)
	AC230V	AC400V
M-NZM1-63	three point five	three point three
M-NZM2-100	two point six	three point three
M-NZM3-160	three point eight	three point three
M-NZM3-225	three point eight	three point three
M-NZM4-400	three point seven	two point seven
M-NZM5-630	two point three	two point seven
M-NZM6-800	two point five	two point eight

2. Split release device
Wiring diagram (dashed box shows internal attachments for production)

K: The normally closed contact of the micro switch connected in series with the coil inside the shunt release is automatically disconnected when the circuit breaker is opened and closed when it is closed.

3. Alarm contact

The position of the circuit breaker when it is in the "open" and "close" positions
The position of the circuit breaker when it is in "automatic trip" (alarm) mode

Specifications: AC50Hz, 230V or 400V; DC220V or 24V (note: DC24V is not recommended).
When the rated control power supply voltage is between 70-110%, the shunt release should reliably trip the circuit breaker.

4. Auxiliary contacts

The circuit breaker is in the "open" position		Circuit breakers with a current rating of 400A or higher on the shell frame (one set of four pairs of contacts)
		Circuit breakers with a current rating of 225A or below (one set of two pairs of contacts)
The position of the circuit breaker when it is in the "closed" position		Circuit breakers with a current rating of 400A or higher on the shell frame (one set of four pairs of contacts)
		Circuit breakers with a current rating of 225A or below (one set of two pairs of contacts)

External accessories of circuit breaker
1. Mechanical linkage locking mechanism for two circuit breakers

model	A		B	C	D	L	H	Remarks
M-NZM1-63	seventy-eight		one hundred and two	eighteen	thirteen	ninety-five	twenty-two	Used for M-NZM1-63N, H
M-NZM2-100	ninety-two		one hundred and twenty	eighteen	eleven point five	one hundred and eighteen	twenty-two	Used for M-NZM2-100N, H, L
M-NZM3-160	one hundred and seven		one hundred and thirty-five	eighteen	nine	one hundred and thirty	twenty-two	Used for M-NZM3-160N, H, L
M-NZM3-225	one hundred and seven		one hundred and thirty-five	eighteen	nine	one hundred and thirty	twenty-two	Used for M-NZM3-225N, H, L
M-NZM4-400	one hundred and fifty		one hundred and ninety	forty-two	sixteen	one hundred and seventy-five	twenty-two	Used for M-NZM4-400N, H, L
M-NZM5-630	one hundred and eighty-two		two hundred and twenty	forty-two	twelve	one hundred and ninety-eight	twenty-two	Used for M-NZM6-630N, H
M-NZM6-800	two hundred and ten		two hundred and forty	forty-two	twenty-nine point five	two hundred and thirty	twenty	Used for M-NZM-630/800H, L
M-NZM1-63/4P		one hundred and three	one hundred and thirty-two	eighteen	thirteen	one hundred and twenty-five	twenty-two	Used for M-NZM1-63 Level 4
M-NZM2-100/4P		one hundred and twenty-two	one hundred and fifty-two	eighteen	eleven point five	one hundred and fifty	twenty-two	Used for M-NZM2-100 Level 4
M-NZM3-160/4P		one hundred and forty-two	one hundred and seventy-three	eighteen	nine	one hundred and sixty-eight	twenty-two	Used for M-NZM3-160 Level 4
M-NZM3-225/4P		one hundred and forty-two	one hundred and seventy-three	eighteen	nine	one hundred and sixty-eight	twenty-two	Used for M-NZM3-225 Level 4
M-NZM4-400/4P		one hundred and ninety-eight	two hundred and forty	forty-two	sixteen	two hundred and twenty-five	twenty-two	Used for M-NZM4-400 Level 4
M-NZM5-630/4P		two hundred and forty	two hundred and eighty	forty-two	twelve	two hundred and fifty-eight	twenty-two	Used for M-NZM5-630 Level 4

Note: For products with M-NZM2-100 arcing distance of 50mm, L1=200mm


M-NZM series plastic shell circuit breaker