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DW1 - 4000 Air Circuit Breaker (ACB/Universal Circuit Breaker) Fixed & Drawer Type
DW1-4000 belongs to DW1 series mainstream low-voltage ACB, designed for 50Hz, 380V/660V power distribution systems, serving as core main switch for Medium-sized substation, heavy industry workshop, commercial complex main switch. It integrates complete circuit protection, dual installation modes, and stable operation performance, fully compliant with GB/T 14048.1/2 & IEC 60947-1/2 standards.
DW1 Series Universal Air Circuit Breaker (ACB) – Model & Application Scenario
| Series Model | Frame Current (In) | Rated Working Voltage | Typical Application Scenarios |
|---|---|---|---|
| DW1-1000 | 1000A | AC 380V/660V 50Hz | Medium power distribution, factory workshop main switch, commercial building power supply |
| DW1-1600 | 1600A | Large workshop distribution, high-rise building distribution room, industrial equipment main power | |
| DW1-2000 | 2000A | Industrial park distribution, large shopping mall, hospital main power system | |
| DW1-3200 | 3200A | Factory substation, industrial production line, large data center auxiliary power | |
| DW1-4000 | 4000A | Medium-sized substation, heavy industry workshop, commercial complex main switch | |
| DW1-6300 | 6300A | Large substation, heavy industry production base, municipal power distribution network | |
| DW2-1000 | 1000A | AC 380V/660V 50Hz | Upgraded medium distribution, frequency conversion equipment power, marine auxiliary power |
Note: All DW1/DW2 series ACB are designed for low-voltage power distribution systems, providing overcurrent, short-circuit and under-voltage protection for power supply lines and electrical equipment.
DW1-4000 Universal Air Circuit Breaker (ACB) – Product Overview
The DW1-4000 universal air circuit breaker is an extra-high capacity low-voltage electrical device for AC 50Hz power distribution systems, with rated working voltage AC 380V/660V and rated frame current 4000A. Complying with GB/T 14048.2 and IEC 60947-2 standards, it adopts a reinforced structure and high-performance contact system, specially designed for large-capacity power distribution and short-circuit protection in heavy industry and power stations.
Equipped with high-precision electronic or thermal-magnetic tripping units, it provides complete protection against overload, short circuit, undervoltage, phase loss and other faults. With ultra-high breaking capacity, low temperature rise and long service life, it is widely used in medium-sized substations, heavy industry workshops, large commercial complexes and other high-power applications.
DW1-4000 ACB – Core Product Advantages
- Ultra-high breaking capacity: Rated ultimate short-circuit breaking capacity up to 75kA (AC 380V), suitable for large power systems.
- 4000A extra-high frame current: Stable long-term operation under heavy load with low temperature rise and high safety.
- Flexible tripping modes: High-precision electronic tripping and reliable thermal-magnetic tripping available.
- Comprehensive fault protection: Integrates overload, short circuit, undervoltage, phase loss and fault indication functions.
- Reinforced modular structure: Independent mechanism, contact system and tripping unit for easy maintenance.
- Stable energy storage operation: Fast closing/opening speed, mechanical life up to 10,000 operations.
- High protection level: Flame-retardant shell with IP30 protection, adapting to harsh industrial environments.
- Multiple installation methods: Fixed type and draw-out type compatible with standard high-current draw-out cabinets.
- Intelligent interconnection: Optional remote control, signal feedback and communication interface for smart power systems.
Main Technical Parameters
DW1-4000 ACB – Main Technical Parameters
| Parameter Category | Parameter Item | DW1-4000 Specification |
|---|---|---|
| Basic Electrical Parameters | Rated Working Voltage (Ue) | AC 380V / AC 660V |
| Rated Frame Current (In) | 4000A | |
| Rated Frequency (f) | 50Hz | |
| Short-Circuit Breaking Capacity | Rated Ultimate Breaking Capacity (Icu) @ 380V | 75kA |
| Rated Service Breaking Capacity (Ics) @ 380V | 55kA | |
| Peak Withstand Current (Icw) @ 380V | 150kA | |
| Rated Breaking Capacity @ 660V | 50kA | |
| Tripping Characteristics | Tripping Type | Thermal-magnetic / Electronic (optional) |
| Instant Tripping Current | 10~14In (short circuit) | |
| Overload Tripping Time | Inverse time characteristic (1.05In no trip for 2h; 1.3In trip within 2h) | |
| Mechanical Performance | Mechanical Life | 10,000 times |
| Electrical Life | 5,000 times | |
| Structural Parameters | Pole Number | 3P / 4P |
| Protection Grade | IP30 | |
| Installation Method | Fixed type / Draw-out type | |
| Environmental Parameters | Working Temperature | -5℃ ~ +40℃ (≤95% humidity, no condensation) |
| Pollution Degree | 2 | |
| Compliance Standards | National & International Standards | GB/T 14048.2, IEC 60947-2 |
Outline dimension and Install Dimension of drawer type
Outline dimension and install dimension of Fiexed Type
DW1-4000 ACB – Installation Instructions & Selection Guide
1. Installation Instructions
- DW1-4000 ACB supports fixed and draw-out installation, suitable for standard high-current low-voltage cabinets, and must be installed vertically (verticality error ≤1°).
- 3P model is used for heavy industrial power systems; 4P model is suitable for large infrastructure and data centers requiring neutral protection.
- Use copper cables up to 300mm², with terminal tightening torque 16–18Nm to ensure reliable connection and avoid overheating.
- Keep the working environment free of corrosive gas, conductive dust and strong vibration; install forced ventilation in closed high-temperature spaces.
- After installation, perform a manual tripping test to verify normal operation of all protection functions.
- Perform regular maintenance every 6 months: clean internal dust, check contact wear and mechanism flexibility.
2. Selection Guide
- Voltage selection: AC 380V for conventional heavy-duty distribution; AC 660V for special industrial power systems.
- Pole type selection: 3P for high-power motors, pumps and compressors; 4P for mixed single/three-phase load systems.
- Tripping selection: Thermal-magnetic tripping for standard distribution; electronic tripping for precision adjustable protection.
- Installation selection: Fixed type for compact distribution cabinets; draw-out type for large substations requiring convenient maintenance.
- Function selection: Add undervoltage release for important loads; select communication module for intelligent power monitoring systems.
DW1-4000 ACB – Typical Application Scenarios
Medium-sized Substations & Heavy Industry
Main incoming line, heavy industry workshop power supply, metallurgical equipment distribution
Main incoming line, heavy industry workshop power supply, metallurgical equipment distribution
Large Commercial Complexes
Super-large shopping malls, integrated business districts, high-rise building main power
Super-large shopping malls, integrated business districts, high-rise building main power
Data Centers & Energy Bases
Main power distribution, UPS system protection, large data center power supply
Main power distribution, UPS system protection, large data center power supply
Extra-high Power Equipment
Large motors, compressors, fans, pumps and other heavy industrial machinery
Large motors, compressors, fans, pumps and other heavy industrial machinery
Municipal & Public Projects
Airport, railway station, port and wharf main power distribution systems
Airport, railway station, port and wharf main power distribution systems
Other High-power Applications
Large construction site main power, marine power systems, industrial park master switch
Large construction site main power, marine power systems, industrial park master switch