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High Breaking Capacity 4000A Air Circuit Breaker - CBRW3 from China Suppliers and Factory for Reliable Power Distribution
Normal Operating and Installation Conditions
Ambient Air Temperature
Maximum: +55°C; Minimum: -5°C.
Altitude
The installation site should not exceed 2000 meters above sea level. Derating factors for high altitude should be taken into consideration.
Atmospheric Conditions
At +55°C, relative humidity should not exceed 50%. Higher humidity is permissible at lower temperatures (e.g., up to 90% at +20°C). Special measures should prevent condensation from temperature variations.
Installation & Pollution
Pollution Degree: 3. Installation Category: Main circuit IV, Control/Auxiliary circuits III. Vertical inclination must not exceed 5°.
Protection Degree
IP30 or IP40 (when installed in a cabinet compartment with an additional door frame and transparent organic glass cover). Utilization Category: Category B.
Product Features
Product Model and Its Meanings
| ATA | 4000 | / | 4000A | / | 3P | / | Operating Voltage of Control Circuit(M) | / | Model of Intelligent Controller AC380V/AC220V/DC220V/DC110 |
| 3600A | |||||||||
| 3200A | |||||||||
| 3150A | |||||||||
| 2900A | |||||||||
| 2500A | |||||||||
| 2000A |
Main Technical Parameters
| Circuit Breaker Model | ATA4000 | ||
| Rated Current of Frame Level Inm (A) | 4000 | ||
| Rated Working Current In (A) | 2000、2500、2900、3150、3200、3600、4000 | ||
| Rated Working Voltage Ie (V) | AC230、AC400、AC690 | ||
| Rated Frequency Hz | 50/60Hz | ||
| Rated Insulation Voltage Ui (V) | 1000 | ||
| Rated Impulse Withstand Voltage Uimp (kV) | 12 | ||
| Number of Poles (P) | 3 | ||
| Total Breaking Time (ms) | 30 | ||
| Closing Time (ms) | 60 | ||
| Rated Limited Short - circuit Breaking Capacity Icu (kA) (RMS Value) | AC230V | 65 | |
| AC400V | 65 | ||
| AC690V | 50 | ||
| Rated Running Short - circuit Breaking Capacity Ics (kA) (RMS Value) | AC230V | 65 | |
| AC400V | 65 | ||
| AC690V | 50 | ||
| Rated Short - time Withstand Current Icw (1s)(kA)(RMS Value) | AC230V | 65 | |
| AC400V | 65 | ||
| AC690V | 50 | ||
| Operating Performance（Times） | Electrical Life | AC230V AC400V | 6000 |
| AC690V | 3000 | ||
| Mechanical Life | Maintenance - free | 10000 | |
| With Maintenance | 15000 | ||
| Installation Type | Fixed Type | ||
| Main Circuit Wiring Method | Horizontal Wiring, Vertical Wiring | ||
| Overall Dimensions: W×H×D mm | 537X406X406 | ||
| Weight (kg) | 77.5 | ||
Product Structure
The circuit breaker has a compact structure, small volume, and the feature of three-dimensional separation. The contact system is sealed in the insulating base and bottom plate with a separating structure. Each phase contact is separated to form individual small chambers. The intelligent controller, operating mechanism, handle, and motor operating mechanism are arranged in sequence in front of it to form their respective independent units.
1. Fixed-type Circuit Breaker:
The fixed-type circuit breaker consists of the circuit breaker body and the fixed installation side plate. The fixed installation side plate is used for installing and fixing the relative position of the circuit breaker in the switch cabinet.
2. Structure Diagram of Fixed-type Circuit Breaker
