Low Voltage Electric Components- Intelligent Universal Circuit Breaker


MZW2 Series Intelligent Universal Circuit Breaker [Low Voltage Electric Components]

Sorts of Intelligent Universal Circuit Breaker L Type -economical type (current column display, dial plate for adjustment)
M Type-general type (current digit display, button adjusts)
H Type -communication type (current digit display, button adjusts as well as communications)
2M Type-high resistance of disturbance (digit display, button adjusts)
2H Type -high resistance of disturbance communication type (current digit display, button adjusts as well as communications)

Specification & Model - Intelligent Universal Circuit Breaker
Function Power distribution or motor protection/generator protection Note
Model H Type, 2H Type 1 All are digit units. 2 L Type adopts LED display, code switch and dial switch setting mode.3 .M, H, 2M,
2H types adopt digital tube display and button adjusting mode.
M Type, 2M Type 1 communication interface: provide standard RS485 interface, multi-protocol data transmission function (internal accumulated communication protocol MODBUS protocol)

2 position lock: selective “set, local and remote control” position states
L Type functional meters measure: voltage, frequency, power factors, active power and active electric
L4 Selective protection and ground or leakage
L3 selective protection
L2 basic protection Short delay Ground or leakage
Long delay and instantaneous
functions
Other auxiliary functions 1 RMS protection
2 load current light column display
3 four groups of signal contact points output (can be programmed)
4 test function
5 breakdown memory function
6 self-diagnose function
7 MCU puts through and skips the switch
8 heat memory function		 1 more protection functions, five feature curves are selectable.
△2contact attrition and mechanical life span instruction
3 load monitor
△4 incident record
5 programming interface
6 breakdown clock△
7 history record of electric network parameter
△
Normal Working Conditions - Intelligent Universal Circuit Breaker
1. Surrounding air temperature: maximum +40°C, minimum -5°C
2. 24 hours average value less than +35°C
Note: (1) If minimum is +10°C or -25°C, please state it in the order.
(2) If maximum is over +40°C and minimum is below +10°C or -25°C, please consult with us.
Atmospheric conditions - Intelligent Universal Circuit Breaker
- The air relative humidity should below 50% at the temperature of +40°C; It can be a little higher during lower temperature. The highest relative humidity in the most humid month should be 90% and the monthly lowest average temperature is +25°C. The dew on the surface of the product due to the temperature change is considered. If beyond these stipulations, please consult with us.
- Protection rank: IP30
- category: B or A
Installation Category
Circuit breakers of rated working voltage 690V and below are belong to installation category Ⅳ; Except lack-of-voltage button release coil and power supply transformer preliminary coil are identical with the main circuit, the installation category of other auxiliary circuits belongs to 400V rated working voltage auxiliary circuit installation category III. The rated short circuit breaking ability and short term current tolerance of the circuit breaker please refer to Table II. 
Technical parameters: Intelligent Universal Circuit Breaker
Table I: Rated current of the circuit breaker

rated current of shell and frame grade INM(A)		 Rated current IN(A)
2000 (400)630, 800, 1000, 1250, 1600, 2000
3200 2000, 2500, 3200
4000 3600, 400
6300 4000, 5000, 6300

Note: The rated short circuit breaking ability and short term current tolerance of the circuit breaker please refer to Table II. The flying arc distance of the circuit breaker is “zero” (that is, there is no flying arc outside the circuit breaker)
Table II
Rated current of shell and frame grade INM(A) 2000 3200 4000 6300
Rated extreme short circuit breaking ability 400V 80 100 100 120
ICU(KA)O—CO 690V 50 65 75 85
Rated short circuit putting through ability 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 ability 400V 50 65 80 100
ICU(KA)O-CO-CO 690V 40 65 65 75
Rated short circuit current tolerance ICW 400V 50 65 65/80(MCR) 85/100(MCR)
(KA)1S, delay 0.4S,0-CO 690V 40 50 50/65(MCR) 65/75(MCR)
Note: The maximum power loss of the circuit breaker is 360W. Please refer to Table III for the rated continuous current change in different temperatures. Note: the capacity fall coefficient is 0.9 if the current is above 2500A. The capacity does not fall at 4000A within 6300A. 21 Back