MZW2 series intelligent universal circuit breakerDetailed product description：

Product Overview:
The MZW2 series intelligent universal circuit breaker absorbs the advantages of various intelligent circuit breakers at home and abroad. It has the characteristics of compact structure, high reliability, short full break time, and no arcing. In addition to multifunctional protection features, it also has various auxiliary functions such as ammeter, voltmeter, power factor meter, fault inspection, self diagnosis MCR, etc. It also has a communication interface and can achieve long-distance four remote functions. The product has passed the strict assessment of the latest international electromagnetic compatibility standard IEC60947-2 (97) and various type tests. The main technical specifications include
Aim to reach the advanced level of similar products both domestically and internationally.

MZW2 series intelligent universal circuit breaker

Usage and classification
The MZW2 series intelligent universal circuit breaker (hereinafter referred to as the circuit breaker) has a rated voltage of 400V, 690V, AC 50Hz, and a rated current of 400A-6300A. It is mainly used in distribution networks to distribute electrical energy, protect lines, and protect power equipment from overload, short circuit, single-phase grounding, undervoltage, and other hazards. This circuit breaker has multiple intelligent protection functions, which can achieve selective protection and precise action, avoiding unnecessary power outages and improving power supply reliability. Simultaneously equipped with an open communication interface, it can perform four remote operations to meet the requirements of the group center and automation system.
This circuit breaker has a pulse withstand voltage of 8000V at an altitude of 2000M (adjusted according to standards for different altitudes, up to a maximum of 12000V). This circuit breaker does not come with an intelligent system
Separators and sensors can serve as isolation devices.
The circuit breaker complies with standards such as GB14048.2 "Low Voltage Switchgear and Control Equipment Circuit Breakers" and IEC60947.2 "Low Voltage Switchgear and Control Equipment Circuit Breakers".

classification
A by usage category
a、 Non selective
b、 selectivity
B divided by installation method
a、 fixed type
b、 drawer-type
C divided by pole: three poles, four poles
D divided by operation mode
a、 electric operation
b、 Manual operation (for maintenance purposes)
Types of release devices
Intelligent overcurrent controller, undervoltage instantaneous (or delayed) release, and shunt release.
Performance and characteristics of intelligent overcurrent controller

performance characteristics
Performance:
a、 Intelligent controllers are divided into: H-type (communication type), M-type (ordinary type), L-type (economy type), 2M type (high immunity type), 2H type (high immunity communication type)
b、 It has overload long delay inverse time limit, short delay inverse time limit, timed limit, and instantaneous action functions. Users can set the required protection features by themselves;
c、 Single phase grounding protection function:
d、 Display function: setting current display, action current display, and line voltage display (voltage display should be specified at the time of ordering);
e、 Alarm function: overload alarm;
f、 Self check function: overheating self check, microcomputer self diagnosis;
g、 Test function: Test the action characteristics of the controller.
There are five types of intelligent controllers based on their functions:
L-type - Economic type (current column display, dial adjustment)
M-type - ordinary type (current digital display, button adjustment)
H-type - communication type (current digital display, button adjustment and communication)
2M type - high anti-interference type (current digital display, button adjustment)
2H type - high anti-interference communication type (electronic digital display, button adjustable and communicable)

Specification Model

purpose		Distribution or motor protection/generator protection					remark
model		H-type, 2H type					1. All are numbers Modular unit 2. L-type adopts LED Display, code on Turn off and toggle switch Setting method 3. M, H, 2M The 2H model adopts digital technology Tube display, button Whole way
		M-type, 2M type				1. Communication interface: Provide Provide standard RS485 connection Mouth, multi protocol data Transmission function (internal) Integrate a communication protocol Discussion on MODBUS Protocol 2. Position lock: optional Settings, Local and Remote control "position state
		L-shaped			Menu function Measurement: Voltage, frequency, power factor, active power, active kWh
		L4 selects protection+grounding or leakage
		L3 Select Protection
		L2 Basic Protection	short delay	Grounding or leakage
		Long delay+instantaneous
function
	Other auxiliary	1. Effective value protection 2. Load current light column current indication 3. Four sets of signal contact outputs (programmable) 4. Experimental function 5. Fault memory function 6. Self diagnostic function 7. MCU connection and over limit tripping function 8. Hot memory function			1. More protection functions, five characteristic curves to choose from △ 2. Contact wear and mechanical life indication 3. Load monitoring △ 4. Event record 5. Programming interface 6. Fault clock function △ 7. Power grid parameter history recording function △

Note: "△" is an optional function
Normal working conditions
Surrounding air temperature
The upper limit value shall not exceed+40 ℃;
The lower limit value shall not be lower than -5 ℃;
The average value over 24 hours shall not exceed+35 ℃;
Note: The working conditions with a lower limit of A at+10 ℃ or -25 ℃ must be declared by the user to our factory when placing an order;
If the upper limit value of B exceeds+40 ℃ or the lower limit value is below -10 ℃ or -25 ℃, the user should negotiate with our factory.
The altitude of the installation location shall not exceed 2000M
atmospheric conditions
The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is+40 ℃; At lower temperatures, there can be higher relative humidity, with an average maximum relative humidity of 90% in the wettest month, and a monthly average minimum temperature of+25 ℃, taking into account condensation on the product surface due to temperature changes. Beyond the regulations, users should negotiate with our factory.

Protection level: IP30.
Usage category: Class B or Class A.
Installation category
Circuit breakers with a rated working voltage of 690V or below are used for installation category IV; The installation category of auxiliary circuits, except for the undervoltage trip coil, the primary coil of the power transformer, and the main circuit of the circuit breaker, has a rated working voltage of 400V. The installation category of auxiliary circuits is III.
The rated short-circuit breaking capacity and short-time withstand current of the circuit breaker are shown in Table 2.
Technical parameters and data
The rated current of the circuit breaker is shown in Table 1

Shell level rated current INM (A)	Rated current IN (A)
two thousand	(400) 630, 800, 1000, 1250, 1600, 2000
three thousand and two hundred	2000, 2500, 3200
four thousand	3600, 400
six thousand and three hundred	4000, 5000, 6300

The rated short-circuit breaking capacity and short-time withstand current of the circuit breaker are shown in Table 2. The arcing distance of the circuit breaker is "zero" (i.e. there is no arcing outside the circuit breaker) Table 2

Shell level rated current INM (A)		two thousand	three thousand and two hundred	four thousand	six thousand and three hundred
Rated ultimate short-circuit breaking capacity	400V	eighty	one hundred	one hundred	one hundred and twenty
ICU（KA）O—CO	690V	fifty	sixty-five	seventy-five	eighty-five
Rated short-time making capacity	400V	176/0.2	220/0.2	220/0.2	264/0.2
NXICU（KA）/COSF	690V	105/0.25	143/0.2	165/0.2	187/0.2
Rated operating short-circuit breaking capacity	400V	fifty	sixty-five	eighty	one hundred
ICU（KA）O-CO-CO	690V	forty	sixty-five	sixty-five	seventy-five
Rated short-circuit withstand current ICW	400V	fifty	sixty-five	65/80(MCR)	85/100(MCR)
（KA）1S， Delay 0.4S, 0-CO	690V	forty	fifty	50/65（MCR）	65/75（MCR）

The maximum power consumption of the circuit breaker is 360W. The rated continuous current variation of the circuit breaker at different ambient temperatures is shown in Table 3
Note: The derating factor for voltages above 2500A is 0.9, with 4000A of 6300A not derating.