ZQW18-1600 Intelligent universal circuit breaker

Application Scope

ZQW18 series air circuit breaker ,which is suitable forAC5OHz、Rated current 20OA-4000A,Rated insulation voltage1140V,Ratedoperation voltage AC400V/AC690V/AC1140Vin distribution system and which distribute the power andprotect circuit, power supplydevice against fault to overload,under-voltage, short-circuit and single-phasedamage and also disconnect function. Air circuitbreaker with multiple functions and high selection protection, which improve the reliability of power supply.

Multiple Protection Device

Draw out-type air circuit breaker shall include doorinterlock,draw out-type three positions lock and unlockdevice,disconnection position key-lock, closing / openingbutton lock protection device.

Type symbol
ZQ W 18 □ – □ / □

ZQ -Number of Pole
w -Grade current for ACR case
18 -H: high breaking capacity, normal in blank
□ -Design no.:
□ -Air circuit breaker
□ -Enterprise code

Standard & Certificate

Compliance with Part No:1 General of IEC60947 Low Switch and Control Equipment
Compliance with Part No:2 Low Voltage Switch Circuit Breaker of IEC60947 Low Switch and Control Equipment

Normal service conditions:

• Ambient temperature:-5″C~+40℃; the average value no more than+35°C within 24 hours
• Ultimate air conditions: Maximum temperature:+40°C ，Air relative humidity no more than 50%.Higher relative humidity
• While lower temperature, for example:20C up to 90%.To make provision for occasional incur due to dewing.
• Site altitude: ≤2000m.
• Level of contamination:Ⅲ
• Mounting conditions: Perpendicularity & angularity of air circuit breaker ≤5°. Air circuit breaker is installed under non-explosive, nonconducted dust, • non-sufficient corrosion metal and without destructive insulation conditions.
• Mounting category: Mounting category Ⅳ for main circuit of air circuit breaker,under-voltage trip coil and the power transformer primary coil.Mounting category Ⅲ forother supplement circuit and control circuit.
• Degree of protection:IP30，IP40 (Mounting protective frame)
• Utilization category:B

Construction diagram

• Draw out-type air circuit breaker three positions lock
Draw out-type base must have connection, testing and closing position by a indicator. Air circuit breaker shall be locked respectively on the three positions by the handle and, shall push three-position unlock button for release.

• Draw out-type air circuit breaker position lock device
the base must have connection/testing/closing position padlock. the base cannot be moved other positions after pulling out the padlock.The padlock is provided for the user.