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EXM3E Electronic MCCB Breaker

The EXM3E is an advanced electronic MCCB breaker designed for high-performance protection and intelligent control in low-voltage distribution systems. With a rated insulation voltage up to 1000V and current ratings up to 1250A, it ensures safe and reliable protection against overload, short circuit, under-voltage, and earth faults.
Equipped with electronic release units, the EXM3E allows adjustable protection settings, fault indication, and remote monitoring, making it ideal for industrial automation and power distribution. It is fully compliant with IEC 60947-2 and GB/T 14048.2 standards.

✅ Precision Electronic Protection
✅ High Breaking Capacity
✅ Flexible Installation Options
✅ Communication & Remote Control Ready
✅ Wide Application Compatibility
✅ Modular Accessories Support

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Product Description

Precision Electronic Protection

Equipped with an advanced electronic trip unit, offering highly accurate overload, short-circuit, and ground fault protection with adjustable parameters.

High Breaking Capacity

Supports up to 100kA breaking capacity, ensuring safe operation in demanding industrial power distribution systems.

Flexible Installation Options

Available in fixed, plug-in, and withdrawable mounting types, suitable for various switchgear and panelboard configurations.

Communication & Remote Control Ready

Optional RS485 Modbus module enables integration with energy management and building automation systems.

Wide Application Compatibility

Suitable for low-voltage distribution, motor protection, industrial automation, and renewable energy systems.

Modular Accessories Support

Compatible with a full range of accessories including auxiliary contacts, alarm contacts, shunt trip, UV release, and motorized operation.

Applications

The EXM3E Electronic MCCB is ideally suited for applications requiring precise, programmable circuit protection and advanced monitoring capabilities. Its high breaking capacity and intelligent trip unit make it a reliable choice for use in industrial power distribution networks, automated manufacturing systems, large commercial buildings, and renewable energy installations such as solar or wind power plants. . Whether used in main switchboards, motor control centers, or sub-distribution panels, the EXM3E provides enhanced protection, operational flexibility, and system safety.

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Product Specs

Item	EXM3E Series
Standard	IEC 60947-2 / GB/T 14048.2
Frame Current (Inm)	125A,160A, 250A, 320A,400A, 630A,800A,1000A,1250A
Rated Operational Voltage (Ue)	AC400V / AC690V
Rated Insulation Voltage (Ui)	AC1000V
Rated Impulse Withstand Voltage (Uimp)	8/12kV
Rated Frequency	50/60Hz
Rated Current (In)	40A–1250A
Number of Poles	3P / 4P
Breaking Capacity	15kA-100kA
Trip Unit Type	Electronic
Protection Features	Overload, Short Circuit, Instantaneous Trip, Ground Fault (Optional)
Installation Type	Fixed / Plug-in / Withdrawable (≥400A)
Connection Method	Front / Rear Terminal
Mechanical Life	≥5,000 operations
Electrical Life	≥1,000 operations
Operating Temperature	-25℃ to +70℃
Altitude	≤ 2000m
Pollution Degree	Class 3
Control Voltage (Optional)	DC24V (for accessories)
Optional Accessories	Auxiliary Contact, Alarm Contact, UV Release, Shunt Trip, Motor Op.
Mounting Method	Vertical (default), Horizontal (customized)

Product Content

🔹 How to Choose the Right EXM3E Electronic MCCB Breaker

Rated Current & Frame Size
Select from 125A, 250A, 400A, 630A, 800A, 1000A, 1250A frame sizes based on your load and system requirements. Rated current options range from 63A to 1250A.

Pole Configuration
Choose between 3P and 4P versions depending on whether neutral protection is needed in your application.

Trip Unit Type
The EXM3E series features electronic trip units with programmable settings, offering:

Long-time delay protection
Short-time delay protection
Instantaneous trip protection
Earth fault protection (optional)

Breaking Capacity Types

C type: Basic
S type: Standard
H type: High breaking capacity
Select based on expected fault current levels in your system.

Installation & Mounting
Available in fixed, plug-in, and withdrawable types (from 250A and above). Ensure your panel layout supports the chosen format.

Connection Options

Front or rear terminal connections
Vertical mounting (standard), horizontal available by customization

🔹 How to Purchase the EXM3E Electronic MCCB Breaker

Define Product Configuration
Example:
EXM3E-250S / In 200A / 4P / Electronic Trip Unit / Front Terminal / Earth Fault Enabled / Qty: 10

Specify Accessories
Optional:

Auxiliary contact
Alarm contact
Undervoltage release
Shunt trip
Motorized operating mechanism
Please indicate control voltage if selecting undervoltage or shunt trip (e.g., AC230V, DC24V).

Confirm Installation Requirements

Mounting type (fixed, plug-in, withdrawable)
Terminal connection direction
Accessories box or motor operator if needed

OEM & Engineering Support

Custom logos, packaging, and documentation available
Technical consulting and integration support for OEMs or large-scale projects

FAQs

1. What is the difference between EXM3E electronic MCCB breaker and a traditional MCCB?

Answer：

The EXM3E electronic mccb breaker features an intelligent electronic trip unit, offering adjustable protection settings and precise fault detection, whereas traditional MCCBs typically use thermal-magnetic mechanisms with fixed characteristics.

2. Can the EXM3E electronic mccb breaker be used for motor protection?

Answer：

Yes. The electronic trip unit allows customization of overload and short-circuit parameters, making it suitable for protecting motors from abnormal currents.

3. What trip functions does the EXM3E electronic mccb breaker support?

Answer：

EXM3E supports overload (Ir), short-circuit (Isd), instantaneous (Ii), and optional ground fault protection, with adjustable time-current curves for precise coordination.

4. Is communication available for EXM3E Electronic MCCB Breaker?

Answer：

Optional communication modules are available (Modbus RTU over RS485), enabling remote monitoring, diagnostics, and integration with energy management systems.Optional communication modules are available (Modbus RTU over RS485), enabling remote monitoring, diagnostics, and integration with energy management systems.

5. What types of mounting are available?

Answer：

EXM3E electronic mccb breaker supports fixed mounting by default and plug-in/withdrawable types for 250A and above, offering flexibility in installation and maintenance.

6. What accessories can be added to this electronic mccb breaker?

Answer：

Available accessories include auxiliary contacts, alarm contacts, under-voltage release, shunt trip, and motorized operators for remote control.

7. How do I select the correct model for my application?

Answer：

You should consider rated current, number of poles (3P or 4P), breaking capacity (C, S, H type), trip unit settings, and mounting/connection preferences. Refer to the “How to Choose” section for detailed guidance.

8. What standards does the EXM3E comply with?

Answer：

It complies with IEC 60947-2 and GB/T 14048.2, ensuring reliable performance and global compatibility.