ZQW18 Intelligent universal circuit breaker

Product overview

• ZQw18 series inteligent universal low-voltage circuit breakers (hereinafter referred to as circuitbreakers) are suitable for distribution network with AC 50Hz,rated voltage up to 660V(690V) and ratedcurrent below 4004~6300A to distribute electric energy and protect lines and power equipment fromoverload, undervoltage, short circuit, single-phase grounding and other faults.

• Circuit breaker has intelligent protection function, selective protection accuracy can improvethe reliability of power supply and avoid unnecessary power failure.At the same time, with an opencommunication interface, four remotes can be carried out to meet the requirements of centralizedcontrol center and automation system.

• The circuit breaker has a pulse withstand voltage of 8000V at an altitude of 2000m (the maximumvoltage at different altitudes should not exceed 12000V).This circuit breaker without intelligenttripping device and sensor can be used as isolator, marked as

• Circuit breakers meet the standards of GB/T 14048.2Low-voltage Circuit Breakers forLow-voltageSwitchgear and Control Equipment and IEC60947-2 Circuit Breakers for Low-voltage Switchgear andControl Equipment.

ZQ W 18 -2000 M /2000A 3P NST WHR

ZQ -name of the company
W -product model
18 -Design serial number
2000 -Shell grade
M -Optional codes (L, m,h) of intelligent controller
2000A -Operating current(optional)
3P -Number of optional codes (3-pole, 4-pole)
NST -Optional code of undervoltage release
WHR -Optional code of installation method (FHR WHR)

• The frame grade current Inm=2000, Inm=3200, Inm=4000, Inm= So0o, Inm=6300.
• Optional code of intelligent controller
M standard basic function+intelligent function, with programming interface.
H-type basic function+intelligent function, with programming interface and communication interface.
L-type basic function
• rated current is optional.
2000A 400/630/800/1000/1250/1600/2000A
3200A 2000/2500/3200A
4000A 3200/4000A
5000A 4000/5000A
6300A 4000/5000/6300A
• 3r esents three poles and 4 represents four poles
• Under-voltage release can be selected as NST NO Yu,YU 220V or 380V (delayed or instantaneous).
• The installation method can be FHR fixed type, horizontal board rear wiring, WHR pull-out horizontal board rear wiring.

Normal working conditions and installation conditions

• Ambient air temperature
The upper limit shall not exceed +40℃ , the lower limit shall not be lower than -5℃ , and the average value within 24h shall not exceed +35℃.
Note: For working conditions with the lower limit of-10℃ or -25℃ , users should apply with our factory. Users in working conditions where the upper limit exceeds +40℃ or the lower limit is lower than 10℃ or -25℃ should consult with our factory.
• The altitude of the installation site shall not exceed 2000m.
• atmospheric condition
The atmospheric relative humidity is not more than 50% when the ambient air temperature is +40℃ , and it can be higher at a lower temperature. The monthly average maximum relative humidity of the wettest month is 90%, and the monthly average minimum temperature is +25℃, taking into account the condensation on the product surface due to the temperature change. Users who exceed the requirements should consult with our factory.
• Protection level IP30
• Use class b or class a.
• Installation category
Circuit breakers with rated working voltage of 660V(690V) and below, under-voltage trippers, and thousands of primary coils of power transformers are installed in category lV.
installation conditions
Circuit breakers shall be installed according to the requirements of this manual. The vertical inclination of circuit breakers shall not exceed 5.

Technical data and performance

• Rated current of circuit breaker

• The rated short-circuit breaking capacity and short-time withstand current of the circuit breaker are “zero”(i.e.no flashover
outside the circuit breaker).

Note:The breaking capacity in the table is the same as the upper and lower feed lines.

• The maximum loss power of the circuit breaker is 360W,and the rated continuous current of the circuit breaker varies under
different ambient temperatures.

• Protection characteristics and functions of M-type intelligent overcurrent controller,protection characteristics of overcurrent
controller,setting value lr(l/In)and error of controller

Note:When there are(required)three sections of protection at the same time,the setting values can not cross.