M-NZA series plastic shell circuit breakerDetailed product description：

The M-NZA series plastic shell circuit breakers have main technical performance that meets the international level of the 1990s It has a compact structure, small size, high short-circuit breaking ability, and no arcing
The internal accessory device is installed in a modular manner, with terminal protective covers to enhance safety, and the "base" and "cover plate" are made of different colors to enhance aesthetics

M-NZA series plastic shell circuit breaker (hereinafter referred to as circuit breaker), suitable for AC 50Hz (60Hz), rated insulation voltage 690V, rated working voltage 660V
(690V) and below, DC 250V and below, rated current 12.5A-800A circuit, and used for distributing electrical energy, with infrequent closing and opening under normal conditions
Used for protection in case of overload, short circuit, and undervoltage of lines and equipment Under normal conditions, it can also be used for infrequent switching of power lines
Circuit breakers with rated shell level current below 400A can also be used for frequent starting, interruption during operation, and in case of motor overload, short circuit, and undervoltage of squirrel cage motors
Plays a protective role
Circuit breakers can be loaded with electrical accessories and mechanism accessories for various purposes, such as undervoltage release devices, shunt release devices, auxiliary contacts, alarm contacts, motor operating mechanisms, and conversion handle operating mechanisms
The circuit breaker complies with standards such as IEC60947-2 and GB14048.2

Circuit breakers are suitable for the following working environments:
a. The altitude of the installation location shall not exceed 2000M
b. The temperature of the surrounding medium is not higher than+40 ℃ and lower than -5 ℃
c. In a medium without explosive hazards, where there are no gases or conductive dust that can corrode metals or damage the environment;
d. A place free from rain and thunder
e. Pollution level 3

Installation category:
Installation method of circuit breaker
The basic installation method of circuit breakers is vertical installation, but they can also be installed horizontally

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

The handle can be operated directly without a code; Electric operation is represented by D; External rotation handle operation is indicated by Z
Circuit breakers for power distribution have no code; The motor protection type is "2"
Rated short-circuit breaking capacity level: N-Standard type; H-medium high resolution type; L-high breaking type



classification
1. Classified by the purpose of the circuit breaker: distribution protection type, motor protection type;
2. Divided by wire changing method: pre board wire changing, post board wire changing, plug-in and pull-out wire changing
3. Divided by operation mode: direct operation of the handle, external rotation of the handle, electric operation;
4. Classified by release type: only instantaneous action release (electromagnetic release), combustion+electromagnetic release (compound release)
5. According to the number of poles: Level 2, Level 3 Level 4;

There are six types of medium performance (N-level) in four pole circuit breakers:
Type A: Type N does not have an overcurrent release installed, and the N-level is always switched on and off without being combined with other three poles;
Type B: Type N does not have an overcurrent release installed, and the N pole is connected and disconnected together with the other three poles;
C-type: N-type installation of overvoltage release, with the N pole opening and closing together with the other poles;
D-type: N-type installation of overcurrent release, with the N pole always connected and not connected or disconnected together with the other three poles;
E-type: N-type neutral wire disconnection protector, with the N pole connected and disconnected together with the other three poles;
F-type: N-type installation with performance wire breakage protector, and the N pole is always connected and does not open or close together with the other three poles

Classified by accessory device: with accessory device without accessory device

Main technical performance indicators



M-NZA-125, 160 circuit breaker installation under voltage release width+15MM
Note: All four pole circuit breakers are L-shaped

Overload Long Delay Characteristics of Distribution Protection Circuit Breakers



External dimensions and installation dimensions
M-NZA-125-160 fixed type, board front wiring external dimensions and installation dimensions



Note: Y-Y type circuit breaker three pole center line
The various characteristics and accessories of the circuit breaker have been set by the manufacturer and cannot be adjusted by the user during use

M-NZA-250-1250 fixed type, board front wire changing, external dimensions and installation dimensions



Appearance and installation dimensions
M-NZA-125-800 fixed type, board rear wiring external dimensions and installation dimensions



M-NZA-1250 fixed type, board wiring external dimensions and installation dimensions



M-NZA-125-160 plug-in type, board front wiring external dimensions and installation dimensions


M-NZA-250-400 plug-in type, board front wiring external dimensions and installation dimensions


M-NZA-250-400 plug-in type, board wiring external dimensions and installation dimensions

M-NZA series plastic shell circuit breaker