MCB Type ATS Automatic Transfer Switch, 2P/4P 63A 125A 230/400V AC
MCB Type ATS Automatic Transfer Switch, 2P/4P 63A 125A 230/400V AC
The MCB Type ATS (Automatic Transfer Switch) is a compact, DIN-rail mountable power transfer switch designed to replace traditional bulky ATS solutions. Available in 2P/4P configurations (63A to 125A ratings, 230/400V AC), this miniature circuit breaker-style ATS automatically switches between mains power and backup generator/solar power sources. Featuring break-before-make operation, LED status indicators, and manual override capability, it ensures uninterrupted power supply for homes, offices, telecom equipment, and small commercial loads. Its modular design saves space in distribution panels, making it the ideal choice for cost-effective, reliable backup power management.
The MCB Type ATS (Automatic Transfer Switch) is a compact, DIN-rail mountable power transfer switch designed to replace traditional bulky ATS solutions. Available in 2P/4P configurations (63A to 125A ratings, 230/400V AC), this miniature circuit breaker-style ATS automatically switches between mains power and backup generator/solar power sources. Featuring break-before-make operation, LED status indicators, and manual override capability, it ensures uninterrupted power supply for homes, offices, telecom equipment, and small commercial loads. Its modular design saves space in distribution panels, making it the ideal choice for cost-effective, reliable backup power management.
1. Key Features
- Automatic & Manual Modes: Operates in fully automatic mode for unattended backup switching, or manual mode for maintenance and testing.
- Compact 2P/4P Design: Space-saving form factor ideal for single-phase residential and small commercial installations.
- Wide Current Range: Available in 63A and 125A ratings to suit different load capacities.
- LED Status Indicators: Clear visual indicators for mains power (Un/Non) and backup power (Ur/Ron) status.
- Break-Before-Make Operation: Ensures complete disconnection from one source before connecting to the other, preventing cross-feed and short circuits.
- DIN Rail Mounting: Standard 35mm DIN rail design for easy installation in distribution panels and control cabinets.
- Fast Switching Speed: Quick transfer time minimizes power interruption for sensitive equipment.
- Robust Construction: Flame-retardant housing and high-quality internal contacts ensure long service life and reliable performance.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | LMQ4-M Series |
| Poles | 2P / 3P / 4P |
| Rated Current (Ie) | 63A / 125A |
| Rated Voltage (Ue) | 230V AC / 400V AC |
| Rated Frequency | 50/60Hz |
| Operation Mode | Automatic / Manual |
| Switching Mechanism | Break-Before-Make |
| Mounting Type | 35mm DIN Rail / Panel Mount |
| Status Indicator | LED (Un/Non for mains, Ur/Ron for backup) |
| Housing Material | Flame-retardant engineering plastic (UL94 V-0) |
| Operating Temperature | -25°C ~ +70°C |
| Compliance | IEC 60947-6-1, CE certified |
3. Working Principle
The LVMA LMQ4-M ATS continuously monitors the status of the primary (mains) and secondary (backup generator) power sources:
- Normal Operation: The ATS connects the load to the primary mains power source, with the mains LED indicator lit.
- Power Outage: When mains power fails or drops below the preset threshold, the ATS automatically disconnects the load from mains and connects it to the backup generator power source.
- Power Restoration: When mains power is restored and stabilized, the ATS automatically switches the load back to the mains source and disconnects the generator.
- Manual Mode: The switch can be operated manually for testing, maintenance, or emergency power disconnection, ensuring full control for technicians.
4. Wiring diagram
5. Installation Dimensions
6. Applications
- Residential Backup Power: Homes and apartments using portable or standby generators.
- Small Commercial Facilities: Offices, retail stores, and small businesses requiring continuous power.
- Telecom & IT Systems: Small server rooms, network equipment, and communication devices.
- Off-Grid & Remote Systems: Cabins, workshops, and remote installations with generator backup.
- Emergency Power Systems: Critical lighting, security systems, and medical equipment in small facilities.
7. Installation & Operation Instructions
- Mounting: Install the LMQ4-M ATS on a standard 35mm DIN rail inside the distribution panel or control cabinet, ensuring adequate clearance for wiring and ventilation.
- Wiring:
- Connect the primary mains power source to the “A” terminal.
- Connect the secondary backup generator power source to the “R” terminal.
- Connect the load terminals to the downstream distribution panel or critical loads.
- Tighten all terminal screws to the manufacturer’s recommended torque to prevent overheating.
- Operation:
- Set the switch to “Auto” mode for automatic power transfer.
- Use the “Manual” mode only for testing, maintenance, or emergency operations.
- Verify LED indicators show the correct power source status before energizing the system.
- Safety Notes:
- Disconnect both power sources before performing any wiring or maintenance.
- Comply with local electrical codes and standards for ATS installation and generator connection.
- Regularly test the ATS in manual mode to ensure proper functionality.
8. Frequently Asked Questions (FAQ)
Q1: What is the difference between 63A and 125A models?
The 63A model is suitable for smaller residential loads (e.g., home lighting, appliances), while the 125A model supports higher current loads (e.g., larger homes, small commercial facilities). Choose the rating based on your total connected load.
Q2: Can this ATS be used with portable generators?
Yes, the LMQ4-M ATS works with most single-phase portable and standby generators. Ensure the generator’s voltage and frequency match the ATS specifications.
Q3: Does the ATS require a neutral connection?
Yes, as a 2P single-phase ATS, it requires both line and neutral connections for both power sources and the load.
Q4: What is the switching time of this ATS?
The LMQ4-M ATS features fast switching (typically <1 second) to minimize power interruption for most loads. For sensitive equipment, verify the switching time meets your specific requirements.
Q5: Can I switch between sources manually?
Yes, the ATS includes a manual operation mode for testing, maintenance, or emergency use. Always disconnect power before using manual mode for safety.
Q6: Is this ATS compatible with solar power systems?
It can be used with grid-tie solar systems with backup generators, or off-grid solar systems paired with battery/generator backup, provided the voltage and frequency are within the ATS specifications.
Q7: Is the LMQ4-M ATS CE certified?
Yes, the LMQ4-M series complies with IEC 60947-6-1 standards and carries the CE mark, ensuring compliance with international safety requirements.
9. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Key Features
- Automatic & Manual Modes: Operates in fully automatic mode for unattended backup switching, or manual mode for maintenance and testing.
- Compact 2P/4P Design: Space-saving form factor ideal for single-phase residential and small commercial installations.
- Wide Current Range: Available in 63A and 125A ratings to suit different load capacities.
- LED Status Indicators: Clear visual indicators for mains power (Un/Non) and backup power (Ur/Ron) status.
- Break-Before-Make Operation: Ensures complete disconnection from one source before connecting to the other, preventing cross-feed and short circuits.
- DIN Rail Mounting: Standard 35mm DIN rail design for easy installation in distribution panels and control cabinets.
- Fast Switching Speed: Quick transfer time minimizes power interruption for sensitive equipment.
- Robust Construction: Flame-retardant housing and high-quality internal contacts ensure long service life and reliable performance.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | LMQ4-M Series |
| Poles | 2P / 3P / 4P |
| Rated Current (Ie) | 63A / 125A |
| Rated Voltage (Ue) | 230V AC / 400V AC |
| Rated Frequency | 50/60Hz |
| Operation Mode | Automatic / Manual |
| Switching Mechanism | Break-Before-Make |
| Mounting Type | 35mm DIN Rail / Panel Mount |
| Status Indicator | LED (Un/Non for mains, Ur/Ron for backup) |
| Housing Material | Flame-retardant engineering plastic (UL94 V-0) |
| Operating Temperature | -25°C ~ +70°C |
| Compliance | IEC 60947-6-1, CE certified |
3. Working Principle
The LVMA LMQ4-M ATS continuously monitors the status of the primary (mains) and secondary (backup generator) power sources:
- Normal Operation: The ATS connects the load to the primary mains power source, with the mains LED indicator lit.
- Power Outage: When mains power fails or drops below the preset threshold, the ATS automatically disconnects the load from mains and connects it to the backup generator power source.
- Power Restoration: When mains power is restored and stabilized, the ATS automatically switches the load back to the mains source and disconnects the generator.
- Manual Mode: The switch can be operated manually for testing, maintenance, or emergency power disconnection, ensuring full control for technicians.
4. Wiring diagram
5. Installation Dimensions
6. Applications
- Residential Backup Power: Homes and apartments using portable or standby generators.
- Small Commercial Facilities: Offices, retail stores, and small businesses requiring continuous power.
- Telecom & IT Systems: Small server rooms, network equipment, and communication devices.
- Off-Grid & Remote Systems: Cabins, workshops, and remote installations with generator backup.
- Emergency Power Systems: Critical lighting, security systems, and medical equipment in small facilities.
7. Installation & Operation Instructions
- Mounting: Install the LMQ4-M ATS on a standard 35mm DIN rail inside the distribution panel or control cabinet, ensuring adequate clearance for wiring and ventilation.
- Wiring:
- Connect the primary mains power source to the “A” terminal.
- Connect the secondary backup generator power source to the “R” terminal.
- Connect the load terminals to the downstream distribution panel or critical loads.
- Tighten all terminal screws to the manufacturer’s recommended torque to prevent overheating.
- Operation:
- Set the switch to “Auto” mode for automatic power transfer.
- Use the “Manual” mode only for testing, maintenance, or emergency operations.
- Verify LED indicators show the correct power source status before energizing the system.
- Safety Notes:
- Disconnect both power sources before performing any wiring or maintenance.
- Comply with local electrical codes and standards for ATS installation and generator connection.
- Regularly test the ATS in manual mode to ensure proper functionality.
8. Frequently Asked Questions (FAQ)
Q1: What is the difference between 63A and 125A models?
The 63A model is suitable for smaller residential loads (e.g., home lighting, appliances), while the 125A model supports higher current loads (e.g., larger homes, small commercial facilities). Choose the rating based on your total connected load.
Q2: Can this ATS be used with portable generators?
Yes, the LMQ4-M ATS works with most single-phase portable and standby generators. Ensure the generator’s voltage and frequency match the ATS specifications.
Q3: Does the ATS require a neutral connection?
Yes, as a 2P single-phase ATS, it requires both line and neutral connections for both power sources and the load.
Q4: What is the switching time of this ATS?
The LMQ4-M ATS features fast switching (typically <1 second) to minimize power interruption for most loads. For sensitive equipment, verify the switching time meets your specific requirements.
Q5: Can I switch between sources manually?
Yes, the ATS includes a manual operation mode for testing, maintenance, or emergency use. Always disconnect power before using manual mode for safety.
Q6: Is this ATS compatible with solar power systems?
It can be used with grid-tie solar systems with backup generators, or off-grid solar systems paired with battery/generator backup, provided the voltage and frequency are within the ATS specifications.
Q7: Is the LMQ4-M ATS CE certified?
Yes, the LMQ4-M series complies with IEC 60947-6-1 standards and carries the CE mark, ensuring compliance with international safety requirements.
9. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
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