Moulded Case Circuit breaker (MCCB)
MCCB
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Moulded Case Circuit breaker (MCCB)
Earth Leakage Circuit Breaker/MCCB
The Earth Leakage Circuit Breaker/MCCB is a three-pole or four-pole moulded case circuit breaker with integrated earth...
Product Overview
What This Model Does
The Earth Leakage Circuit Breaker/MCCB is a three-pole or four-pole moulded case circuit breaker with integrated earth leakage protection, rated for 400V AC at 50/60Hz, with a frame size of 630. It provides overcurrent, short-circuit, and earth leakage protection in a single device, suitable for industrial and commercial distribution boards. The device is designed for use in fixed installations where high breaking capacity and reliable earth fault detection are required. It is built to meet standard low-voltage protection needs while integrating earth leakage detection for enhanced safety.
Key Benefits
- Combines overcurrent, short-circuit, and earth leakage protection in one device
- Rated for 400V AC at 50/60Hz with a frame size of 630 for high-current applications
- Available in 3P or 4P configurations for three-phase or three-phase with neutral circuits
- Provides reliable earth fault detection to prevent electric shock and fire risks
- Suitable for fixed installations in industrial, commercial, and infrastructure settings
- Reduces the need for separate earth leakage relays or monitoring devices
Who It Is For
- Electrical wholesalers stocking MCCBs with earth leakage protection
- Panel builders integrating protection devices into distribution boards
- Switchgear assemblers building custom control cabinets
- Solar EPC contractors installing protection in solar inverters and distribution systems
- OEM/ODM buyers integrating a standard MCCB with earth leakage into their own systems
Problems It Solves
- Need for separate earth leakage relays and overcurrent protection devices in a single panel
- Risk of undetected earth faults leading to electric shock or fire in three-phase systems
- Lack of integrated protection in standard MCCBs for industrial applications
- Increased panel space and wiring complexity when using multiple protection devices
- Difficulty in meeting safety standards that require earth leakage detection in commercial and industrial installations
Application Scenarios
- Industrial control panels requiring combined overcurrent and earth leakage protection
- Commercial buildings with three-phase power distribution and need for earth fault detection
- Data centres and server rooms where electrical safety and system continuity are critical
- Commercial HVAC systems with three-phase motors and need for earth leakage monitoring
- Infrastructure projects such as water pumping stations and street lighting with high-current circuits
Technical Features
How It Is Built
- Three-pole or four-pole configuration for 3P or 4P three-phase circuits
- Rated voltage of 400V AC at 50/60Hz
- Frame size of 630 for high-current applications
- Integrated earth leakage protection with adjustable sensitivity
- Mechanical and electrical protection against overcurrent, short-circuit, and earth faults
- Designed for fixed installation in distribution boards and control cabinets
Materials and Construction
- Silver-alloy contacts for high conductivity and long life
- Integrated earth leakage detection module with sensing coil and trip mechanism
- Thermal-magnetic trip unit for overcurrent and short-circuit protection
Quality Control
- Trip characteristic verified against standard overcurrent and earth leakage requirements
- Earth leakage sensitivity tested at the specified threshold
- Mechanical operation checked against the design life cycle
- Insulation and dielectric withstand test performed before packing
- Final inspection for correct pole count, frame size, and label accuracy
Specifications
Stated Ratings for This Model
| Brand Name | HTDQAFCI |
|---|---|
| Rated Frequency | 50/60Hz |
| Rated Voltage | 400V |
| Number of Poles | 3P, 4P |
| Type | Moulded Case |
| Frame Size | 630 |
Ratings are as published for this model. Where a value is not published we mark it TBC rather than estimating it.
Manufacturing Process
- Moulding and machining of the breaker housing and internal components
- Assembly of the thermal-magnetic trip unit and contact system
- Integration of the earth leakage detection module and sensing coil
- Calibration of the earth leakage trip threshold and overcurrent response
- Routine dielectric and operation testing before packing
Customization Options
- Pole count selected as 3P or 4P per order
- Frame size of 630 standard, no other sizes available
- ODM branding on housing print and packaging
- Packaging and carton marking to the buyer's own specification
Comparison
How It Compares
| Standard MCCB without earth leakage | Adds earth fault protection in one device, reducing the need for additional components |
|---|---|
| MCCB with separate earth leakage relay | Reduces panel space and wiring complexity, though the relay may offer more sensitivity settings |
| MCB with earth leakage | Higher breaking capacity and frame size suitable for industrial loads, not residential use |
| Residual Current Device (RCD) with separate overcurrent protection | Single device instead of two, though the RCD may have faster response for earth faults |
Use Guide
- Connect the three-phase conductors and neutral (if 4P) to the appropriate terminals
- Ensure the device is correctly wired with phase and neutral polarity
- Verify the earth leakage trip threshold is set according to the application
- Test the device under load to confirm correct operation and trip response
- Keep the manual handle accessible for local isolation and maintenance
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FAQ
Questions About the Earth Leakage Circuit Breaker/MCCB
What pole configurations are available
The device is available in 3P and 4P configurations for three-phase and three-phase with neutral circuits.
What is the rated voltage and frequency
Rated voltage is 400V AC at 50/60Hz.
Is earth leakage protection integrated
Yes, the device includes integrated earth leakage protection for enhanced safety.
Can it be used in industrial applications
Yes, with a frame size of 630, it is suitable for industrial and commercial distribution systems.
Can we have it branded under our own name
Yes, ODM branding is available on the housing and packaging. Send your artwork and order details to [email protected].
What is the frame size
The frame size is 630, suitable for high-current applications.
What are the minimum order quantity and lead time
Both depend on the pole count and branding requirements. Email [email protected] with your model and quantity for a current response.
Get a Quotation for the Earth Leakage Circuit Breaker/MCCB
Tell us the ratings, pole counts and quantities you need and we will price this model directly.