LMGQ7-63S DIN Rail Digital Under Over Voltage Protector with KWH Display
LMGQ7-63S DIN Rail Digital Under Over Voltage Protector with KWH Display
Auto-reset Under Over Voltage Protection is a modular DIN rail electrical protector rated AC230V 50/60Hz with current options from 16A to 80A. It instantly cuts off power once voltage exceeds overvoltage threshold or drops below undervoltage limit, auto-recloses after preset delay to avoid frequent power interruption, widely used for household appliances, commercial equipment and power distribution system protection。
Auto-reset Under Over Voltage Protection is a modular DIN rail electrical protector rated AC230V 50/60Hz with current options from 16A to 80A. It instantly cuts off power once voltage exceeds overvoltage threshold or drops below undervoltage limit, auto-recloses after preset delay to avoid frequent power interruption, widely used for household appliances, commercial equipment and power distribution system protection。
1. Product Overview
Our digital multifunctional voltage current protector is modular DIN rail design single-phase protective electrical component, combining overvoltage protection, undervoltage protection, overload overcurrent cutoff and built-in kWh energy metering in one compact unit. Equipped with colorful LED digital screen, it synchronously displays real-time AC voltage, load operating current and accumulated power consumption (kWh).
All protection threshold values (overvoltage limit, undervoltage limit, overcurrent ampere value) are freely adjustable via front SET & arrow buttons. Once circuit runs beyond preset parameters, the protector instantly breaks off output power to avoid equipment burnout from abnormal power; after grid voltage/current recovers to normal scope, the device auto-recloses to resume power supply without manual reset. Perfect for household distribution box, off-grid solar power system, rental apartment metering & load protection and small shop electrical control cabinets.
2. Key Features
- 3-in-1 Multifunction Protection: Overvoltage, undervoltage and overcurrent overload three core protection functions integrated.
- Triple Digital Display: Separated red/green/blue LED screen for real-time Voltage(V), Current(A) and Cumulative KWH energy reading.
- Fully Adjustable Protection Values: Custom set upper/lower voltage threshold and maximum overcurrent rating by front control buttons.
- Automatic Reconnect Function: Auto power restoration after grid parameters return to safe preset range, no manual operation needed.
- Standard DIN Rail Mount: 35mm DIN rail snap-in installation, same size as miniature circuit breakers for easy cabinet layout.
- Accurate Built-in KWH Meter: Real-time cumulative energy consumption statistic for power cost calculation.
- Flame Retardant ABS Housing: High temperature resistant insulating shell, anti-aging and safe for long-term indoor installation.
3. Technical Specifications
| Item | Parameter |
|---|---|
| Rated Working Voltage | AC230V 50Hz Single Phase |
| Rated Current Range | Standard 63A adjustable (custom current available) |
| Mounting | 35mm Standard DIN Rail |
| Display Content | AC Voltage / Load Current / Cumulative Kwh |
| Protection Mode | Auto-cut off on abnormal, auto-reclose after recovery |
| Adjustable Range | Overvoltage, Undervoltage, Overcurrent all customizable |
| Shell Material | Flame retardant ABS |
| Operating Temperature | -25℃ ~ +60℃ |
| Certification | CE Certified |
Parameter Menu (P-1~P-12)
| Code | Function | Range | OFF Description |
|---|---|---|---|
| P-1 | Power-on Delay | 1~999s | – |
| P-2 | Auto-recovery Delay | 1~999s | – |
| P-3 | Overvoltage Set | 230~300V | OFF: Close OV protection |
| P-4 | Undervoltage Set | 140~210V | OFF: Close UV protection |
| P-5 | Reserved | – | – |
| P-6 | Overcurrent Set | 1~63A | OFF: Close OC protection |
| P-7 | Reserved | – | – |
| P-8 | Fault Counter | 0~20 times | Lock when over limit |
| P-9 | Reserved | – | – |
| P-10 | Display Mode | 1-Standard/2-Manual/3-Auto | – |
| P-11 | Screen-off Mode | ON/OFF | OFF=Always display; ON=Auto screen off |
| P-12 | Fault Clear(LOX) | 000~999 | Clear fault record |
Trip fixed delay: 0.1~10s
4. Working Principle
- Normal Operation: The protector continuously samples real-time voltage and current data of input circuit, displaying V/A/KWH on digital screen while keeping output circuit normally connected.
- Abnormal Protection Trigger: When voltage exceeds set overvoltage value, drops below undervoltage threshold or load current surpasses preset overcurrent ampere, internal relay instantly disconnects output power to protect downstream electrical appliances.
- Auto Recovery: After grid voltage and load current recover back to user-set safe range and stay stable for preset delay time, the unit automatically closes output circuit to restore power supply.
- Energy Statistics: Built-in metering chip continuously accumulates consumed kWh for long-term power consumption record.
5. Application Fields
- Household Electricity: Home main circuit overvoltage/overload protection, residential distribution box installation
- Rental Housing: Apartment room individual power protection + energy consumption statistics
- Solar PV System: Off-grid single-phase solar inverter output voltage & current protection
- Small Commercial: Convenience store, vending machine, office equipment power safety protection
- Monitoring Equipment: Camera & NVR power anti-surge and overload protection
6. Installation & Operation Guide
- Mount the device onto standard 35mm DIN rail inside distribution cabinet firmly.
- Wiring: Upper terminals for mains INPUT power, bottom terminals for OUTPUT connecting to downstream loads.
- Parameter Setting: Press SET button to enter setup menu, use up/down arrows to modify overvoltage, undervoltage and overcurrent protection values according to actual requirement.
- Power-on Test: Switch on input power, check real-time V/A display, simulate abnormal voltage/current to verify automatic cut-off and auto-reclose function.
- Safety Tip: Cut off upstream main power supply before modifying internal wiring or resetting parameters.
7. FAQ
Q1: Can this protector calculate monthly power consumption?
Yes, it records total cumulative kWh continuously, users can record initial reading manually to calculate periodic power usage.
Q2: Is auto-reconnect delay time adjustable?
Most versions support adjustable auto-reset delay time to avoid frequent on-off caused by instantaneous grid fluctuation.
Q3: What’s maximum rated load current?
Standard stock model is 63A, other current specifications like 40A/80A can be customized.
Q4: Can it work for solar off-grid AC output?
Yes, it is widely used for single-phase solar inverter AC output protection in home solar systems.
Q5: Does this product pass CE certification?
All our DIN rail multifunctional voltage current protectors have passed CE certification complying with EU low voltage standards.
8. Technical Documents & Support
Download the full datasheet for detailed specifications, wiring diagrams, and trip coordination guidelines.
Contact our engineering team for custom configurations, communication module integration, or OEM solutions for large-scale projects.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
Our digital multifunctional voltage current protector is modular DIN rail design single-phase protective electrical component, combining overvoltage protection, undervoltage protection, overload overcurrent cutoff and built-in kWh energy metering in one compact unit. Equipped with colorful LED digital screen, it synchronously displays real-time AC voltage, load operating current and accumulated power consumption (kWh).
All protection threshold values (overvoltage limit, undervoltage limit, overcurrent ampere value) are freely adjustable via front SET & arrow buttons. Once circuit runs beyond preset parameters, the protector instantly breaks off output power to avoid equipment burnout from abnormal power; after grid voltage/current recovers to normal scope, the device auto-recloses to resume power supply without manual reset. Perfect for household distribution box, off-grid solar power system, rental apartment metering & load protection and small shop electrical control cabinets.
2. Key Features
- 3-in-1 Multifunction Protection: Overvoltage, undervoltage and overcurrent overload three core protection functions integrated.
- Triple Digital Display: Separated red/green/blue LED screen for real-time Voltage(V), Current(A) and Cumulative KWH energy reading.
- Fully Adjustable Protection Values: Custom set upper/lower voltage threshold and maximum overcurrent rating by front control buttons.
- Automatic Reconnect Function: Auto power restoration after grid parameters return to safe preset range, no manual operation needed.
- Standard DIN Rail Mount: 35mm DIN rail snap-in installation, same size as miniature circuit breakers for easy cabinet layout.
- Accurate Built-in KWH Meter: Real-time cumulative energy consumption statistic for power cost calculation.
- Flame Retardant ABS Housing: High temperature resistant insulating shell, anti-aging and safe for long-term indoor installation.
3. Technical Specifications
| Item | Parameter |
|---|---|
| Rated Working Voltage | AC230V 50Hz Single Phase |
| Rated Current Range | Standard 63A adjustable (custom current available) |
| Mounting | 35mm Standard DIN Rail |
| Display Content | AC Voltage / Load Current / Cumulative Kwh |
| Protection Mode | Auto-cut off on abnormal, auto-reclose after recovery |
| Adjustable Range | Overvoltage, Undervoltage, Overcurrent all customizable |
| Shell Material | Flame retardant ABS |
| Operating Temperature | -25℃ ~ +60℃ |
| Certification | CE Certified |
Parameter Menu (P-1~P-12)
| Code | Function | Range | OFF Description |
|---|---|---|---|
| P-1 | Power-on Delay | 1~999s | – |
| P-2 | Auto-recovery Delay | 1~999s | – |
| P-3 | Overvoltage Set | 230~300V | OFF: Close OV protection |
| P-4 | Undervoltage Set | 140~210V | OFF: Close UV protection |
| P-5 | Reserved | – | – |
| P-6 | Overcurrent Set | 1~63A | OFF: Close OC protection |
| P-7 | Reserved | – | – |
| P-8 | Fault Counter | 0~20 times | Lock when over limit |
| P-9 | Reserved | – | – |
| P-10 | Display Mode | 1-Standard/2-Manual/3-Auto | – |
| P-11 | Screen-off Mode | ON/OFF | OFF=Always display; ON=Auto screen off |
| P-12 | Fault Clear(LOX) | 000~999 | Clear fault record |
Trip fixed delay: 0.1~10s
4. Working Principle
- Normal Operation: The protector continuously samples real-time voltage and current data of input circuit, displaying V/A/KWH on digital screen while keeping output circuit normally connected.
- Abnormal Protection Trigger: When voltage exceeds set overvoltage value, drops below undervoltage threshold or load current surpasses preset overcurrent ampere, internal relay instantly disconnects output power to protect downstream electrical appliances.
- Auto Recovery: After grid voltage and load current recover back to user-set safe range and stay stable for preset delay time, the unit automatically closes output circuit to restore power supply.
- Energy Statistics: Built-in metering chip continuously accumulates consumed kWh for long-term power consumption record.
5. Application Fields
- Household Electricity: Home main circuit overvoltage/overload protection, residential distribution box installation
- Rental Housing: Apartment room individual power protection + energy consumption statistics
- Solar PV System: Off-grid single-phase solar inverter output voltage & current protection
- Small Commercial: Convenience store, vending machine, office equipment power safety protection
- Monitoring Equipment: Camera & NVR power anti-surge and overload protection
6. Installation & Operation Guide
- Mount the device onto standard 35mm DIN rail inside distribution cabinet firmly.
- Wiring: Upper terminals for mains INPUT power, bottom terminals for OUTPUT connecting to downstream loads.
- Parameter Setting: Press SET button to enter setup menu, use up/down arrows to modify overvoltage, undervoltage and overcurrent protection values according to actual requirement.
- Power-on Test: Switch on input power, check real-time V/A display, simulate abnormal voltage/current to verify automatic cut-off and auto-reclose function.
- Safety Tip: Cut off upstream main power supply before modifying internal wiring or resetting parameters.
7. FAQ
Q1: Can this protector calculate monthly power consumption?
Yes, it records total cumulative kWh continuously, users can record initial reading manually to calculate periodic power usage.
Q2: Is auto-reconnect delay time adjustable?
Most versions support adjustable auto-reset delay time to avoid frequent on-off caused by instantaneous grid fluctuation.
Q3: What’s maximum rated load current?
Standard stock model is 63A, other current specifications like 40A/80A can be customized.
Q4: Can it work for solar off-grid AC output?
Yes, it is widely used for single-phase solar inverter AC output protection in home solar systems.
Q5: Does this product pass CE certification?
All our DIN rail multifunctional voltage current protectors have passed CE certification complying with EU low voltage standards.
8. Technical Documents & Support
Download the full datasheet for detailed specifications, wiring diagrams, and trip coordination guidelines.
Contact our engineering team for custom configurations, communication module integration, or OEM solutions for large-scale projects.
Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
Related Products
Contact Us
Have questions about our products or services? Our team is here to help you with any inquiries.