The design of USX series molded case circuit breakers reflects the latest current limiting principle and manufacturing technology. it has the characteristics of compact structure, full modularization, high breaking and zero flying arc. its rated insulation voltage is 750v, suitable for AC 50Hz, rated working voltage 690v, rated working current to 1250A circuit for infrequent conversion and motor infrequent start. The circuit breaker has overload, short circuit and undervoltage protection devices, which can protect the line and power equipment from damage. The circuit breaker complies with ICE60947-1 and 1CE60947-2 implementation standards.
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Technical Parameters
Product Description
Standard Certifications IEC60947   GB14048
Item No. USX400,USX630
Number of poles 3,4
Electrical characteristics as per IEC60947-2 and EN60947-2
Rated current(A) In 400-500-630
Rated Operating Voltage(V) Ue 400v
Rated Insulated Voltage (Ui) Ui 800
Rated impulse withstand voltage(kV) Uimp 8kV
Types of Circuit Breakers   F N H
Ultimate breaking capacity
(kA rms Icu)
220/240 40 85 100
380/415 36 50 70
440 30 42 65
500 25 30 50
525 20 22 35
660/690 10 10 20
Rated service breaking capacity
(kA rms Icu)                                        100%
100%
Utilization category   A
Mechanical Parameters Mechanical 4000
Electrical 1000
Protection
Overload protection Bimetal
Instantaneous protection Magnetic
Auxiliaries
Indication contacts AX
AL
AXAL
Voltage releases SHT
UVR
Control Manual with toggle
with direct or extended rotary handle
Dimensions(mm) 3P 255X140X160

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