Overview
The ASCB1 series is Acrel‘s smart power consumption terminal solution, consisting of intelligent micro circuit breakers and intelligent gateways. Breakers (1:1 with distribution circuits) monitor voltage, current, power, energy, temperature & leakage (optional); gateway aggregates up to 16 breakers via RS485 and uploads to cloud via 4G/Ethernet/WiFi. Ideal for low-voltage terminal distribution networks in industrial, commercial & residential buildings—integrating remote control, protection, energy metering and fault location.
Highlight
Highly Integrated
- Protection, metering and control in one unit, replacing multiple traditional components.
Fully Adjustable
- All protection thresholds/delays (overvoltage, undervoltage, overcurrent, overload, leakage, temperature) are configurable.
Smart Remote Control
- Supports local motorized, remote, and scheduled control; control priority selectable (local/remote/local-only).
Tool-Free Wiring
- Standard 35mm DIN-rail, pre-fabricated 8PIN data cable cascade, eliminates wiring errors.
Specification
Intelligent Micro Circuit Breaker
| No. | Product Name | Product Model | Poles | Circuit Type | Electrical Parameter Monitoring | Leakage & Temp. Monitoring | Rated Current | Dimensions (H*W*D mm) | Communication | Installation |
| 1 | Smart MCB 1P | ASCB1-63-C-□-1P | 1P | Single-phase | √ | Temp. (optional) | 6,10,16,20,25,32,40,50,63A | 88*18*68 | RS485 (Modbus) | DIN-rail |
| ASCB1-63-D-□-1P | ||||||||||
| 2 | Smart MCB 2P | ASCB1-63-C-□-2P | 2P | Single-phase | √ | Temp. (optional) | 6,10,16,20,25,32,40,50,63A | 88*36*68 | RS485 (Modbus) | DIN-rail |
| ASCB1-63-D-□-2P | ||||||||||
| 3 | Smart MCB 3P | ASCB1-63-C-□-3P | 3P | Three-phase | √ | Temp. (optional) | 6,10,16,20,25,32,40,50,63A | 88*54*68 | RS485 (Modbus) | DIN-rail |
| ASCB1-63-D-□-3P | ||||||||||
| 4 | Smart MCB 4P | ASCB1-63-C-□-4P | 4P | Three-phase | √ | Temp. (optional) | 6,10,16,20,25,32,40,50,63A | 88*72*68 | RS485 (Modbus) | DIN-rail |
| ASCB1-63-D-□-4P | ||||||||||
| 5 | Smart RCBO 2P | ASCB1LE-63-C-□-2P | 2P | Single-phase | √ | Leakage + Temp. | 6,10,16,20,25,32,40,50,63A | 88*36*68 | RS485 (Modbus) | DIN-rail |
| ASCB1LE-63-D-□-2P | ||||||||||
| 6 | Smart RCBO 4P | ASCB1LE-63-C-□-4P | 4P | Three-phase | √ | Leakage + Temp. | 6,10,16,20,25,32,40,50,63A | 88*72*68 | RS485 (Modbus) | DIN-rail |
Show More
Intelligent Gateway
| No. | Product Name | Product Model | Connect to MCB | Dimensions (H*W*D mm) | Communication | Installation | Protection Rating | Display |
| 1 | Gateway – RS485 | ASCB1-MS | √ (≤16) | 88*72*68 | Uplink: RS485 / Downlink: RS485 | DIN-rail | IP20 | LCD |
| 2 | Gateway – Ethernet | ASCB1-MS-CE | √ (≤16) | 88*72*68 | Uplink: Ethernet / Downlink: RS485 | DIN-rail | IP20 | LCD |
| 3 | Gateway – 4G | ASCB1-MS-4G | √ (≤16) | 88*72*68 | Uplink: 4G / Downlink: RS485 | DIN-rail | IP20 | LCD |
| 4 | Gateway – WiFi | ASCB1-MS-WF | √ (≤16) | 88*72*68 | Uplink: WiFi / Downlink: RS485 | DIN-rail | IP20 | LCD |
Function
Core Monitoring & Protection Functions
- Monitoring: Voltage, current, power, energy, frequency, power factor, temperature, leakage (ASCB1LE only).
- Protection/Alarm: Overvoltage, undervoltage, overcurrent, overload, short-circuit, overtemperature, leakage (ASCB1LE only).
- Control: Local manual toggle, local motorized, local locking, remote control, scheduled control.
- Precise Metering: Voltage/current Class 1, energy Class 1, leakage current Class 1.
- Function Positioning: Acts as a “smart actuating neuron” for low-voltage distribution terminals, enabling digital and intelligent power distribution networks.
FAQ
The ASCB1-MS series gateway supports up to 16 units of intelligent micro circuit breakers (ASCB1-63 / ASCB1LE-63). Different types of breakers can be arbitrarily combined and cascaded via 8PIN data cables, ensuring stable and reliable communication.
The downstream communication of breakers uses Modbus-RTU (RS485); the gateway uplink supports RS485, Ethernet, 4G, WiFi depending on the model, with protocols including Modbus-RTU, Modbus-TCP, MQTT. It can quickly connect to third-party energy management platforms; we provide open API documentation and technical integration support.
Type C: Trips at 5~10x In, suitable for conventional loads such as lighting, sockets, household appliances.
Type D: Trips at 10~14x In, suitable for impact loads such as transformers, motors, UPS.
Select according to the inrush current characteristics of the loads in the circuit.
Yes. The ASCB1-MS series gateway features a built-in LCD dot-matrix screen. Using the panel buttons, users can browse:
Real-time voltage, current, power, energy per circuit
Alarm/fault status
Historical event logs (20 entries each for alarms, faults, operations)
Fully localized visualization, no cloud required.
The operating ambient temperature for the breaker is -10℃ to 55℃, with a 24-hour average not exceeding 40℃. For high-temperature environments, we recommend:
Install distribution boards indoors or in shaded, ventilated areas, avoiding direct sunlight
Ensure adequate heat dissipation
For high-density installations, consider derating or consult our technical team
Yes. The ASCB1LE-63 series features a T/monthly button on the panel. A short press initiates a leakage test trip; the breaker should trip reliably, and the panel LED flashes alternately at 0.5s intervals, indicating the self-test function is normal.
Yes. Authorized users can remotely read/modify the breaker’s protection settings, communication parameters, scheduled control tasks via the host computer or cloud platform. Currently, firmware upgrade is performed via the local RS485 interface; remote upgrade will be supported in future 4G/WiFi versions.
Refer to the table below. After installation, it is recommended to tug the wires gently and retighten with the specified torque.
Rated Current (A) 10 16～20 25 32 40～50 63
Conductor Area (mm²) 1.5 2.5 4 6 10 16
Torque (N·m) 3.5 3.5 3.5 3.5 3.5 3.5
The product enclosure rating is IP20, suitable for indoor dry environments. For coastal or high-humidity projects, we recommend:
Use distribution enclosures with IP54 or higher protection rating
Install modules inside the enclosure, avoiding direct exposure
Conformal coating (moisture, salt spray, fungus protection) customization is available—please specify in your order
Summary
The Acrel ASCB1 series intelligent micro circuit breaker is more than just a switch; it is a complete “sensing-protection-control-communication” integrated terminal solution. Through the deep integration of digital protection settings and IoT communication architecture, it upgrades traditional passive protection to proactive warning and precise maintenance. It represents the ideal foundational unit for building a new-generation intelligent power distribution IoT.
