LMGL3D Series PV DC Disconnect Switch | 315A & 630A 2P 1000V Solar Isolator
LMGL3D Series PV DC Disconnect Switch | 315A & 630A 2P 1000V Solar Isolator
Model Number：LMGL3D
Poles：2P (2-Pole)
Rated Operational Current (Ie)：315A、630A
Rated Operational Voltage (Ue)：1000VDC / 1500VDC
Rated Impulse Withstand Voltage (Uimp)：8kV
Rated Short-Time Withstand Current (Icw)：65kA (for 1s, with appropriate back-up protection)
Breaking Capacity：20kA at 1000VDC / 1500VDC
Mechanical Life：≥10,000 operations
Electrical Life：≥2,000 operations at rated load
Enclosure Material：Flame-retardant engineering plastic (UL94 V-0)
Operating Temperature：-40°C ~ +85°C
Mounting Type：DIN Rail / Panel Mount (with adapter)
Certifications：IEC 60947-1, IEC 60947-3, CE, CCC
Model Number：LMGL3D
Poles：2P (2-Pole)
Rated Operational Current (Ie)：315A、630A
Rated Operational Voltage (Ue)：1000VDC / 1500VDC
Rated Impulse Withstand Voltage (Uimp)：8kV
Rated Short-Time Withstand Current (Icw)：65kA (for 1s, with appropriate back-up protection)
Breaking Capacity：20kA at 1000VDC / 1500VDC
Mechanical Life：≥10,000 operations
Electrical Life：≥2,000 operations at rated load
Enclosure Material：Flame-retardant engineering plastic (UL94 V-0)
Operating Temperature：-40°C ~ +85°C
Mounting Type：DIN Rail / Panel Mount (with adapter)
Certifications：IEC 60947-1, IEC 60947-3, CE, CCC
1. Product Brief
The LMGL3D series 2P PV DC disconnect switch is a heavy-duty professional isolation device designed exclusively for solar photovoltaic power systems. Available in two mainstream current specifications: 315A (LMGL3D-315/2P) and 630A (LMGL3D-630/2P), this DC isolator supports a rated voltage of DC 1500V and is compatible with DC 1000V solar arrays.
Certified under DC-22B/PV2 professional photovoltaic utilization category and compliant with IEC & EN 60947-3 international standards, the switch features 12kV high impulse withstand voltage and 8kA short-time withstand current. It provides safe visible circuit breaking, effective anti-arc performance, and stable overload resistance, serving as the core safety protection component for residential, commercial, and large ground-mounted solar power stations.
2. Core Product Specifications (315A VS 630A)
Below are the full technical parameters of LMGL3D series 2P solar DC disconnect switch, covering all key indicators for solar system matching and engineering selection:
Specification Item | LMGL3D-315/2P | LMGL3D-630/2P |
|---|---|---|
Model | LMGL3D-315/2P | LMGL3D-630/2P |
Pole Number | 2 Pole (2P) | 2 Pole (2P) |
Rated Thermal Current | 315A | 630A |
Rated DC Voltage | DC 1500V (Compatible DC 1000V) | DC 1500V (Compatible DC 1000V) |
Impulse Withstand Voltage | 12kV | 12kV |
Short-time Withstand Current | 8kA / 1s | 10kA / 1s |
Peak Making Current | 10kA / 0.15s | 20kA / 0.15s |
Utilization Category | DC-22B / PV2 (Solar Special Grade) | DC-22B / PV2 (Solar Special Grade) |
Protection Grade | IP20 (Indoor Cabinet Installation) | IP20 (Indoor Cabinet Installation) |
Executive Standard | IEC 60947-3, EN 60947-3, GB/T 14048.3 | IEC 60947-3, EN 60947-3, GB/T 14048.3 |
Operating Temperature | -30℃ ~ +70℃ | -30℃ ~ +70℃ |
Terminal Type | Heavy-duty Copper Bolt Terminal | Enhanced Large-size Copper Bolt Terminal |
3. Product Features & Advantages
3.1 Dual Current Specs for Full Solar Scene Coverage
The LMGL3D series provides two current options to meet differentiated project demands. The 315A model is ideal for residential rooftop solar systems, small and medium commercial PV projects, and ordinary combiner boxes. The 630A high-current model is tailored for large industrial photovoltaic power plants, ground-mounted solar farms, and high-power centralized DC distribution systems, covering all mainstream solar power scenarios.
3.2 Professional PV DC Anti-arc Protection
Adopting DC-22B/PV2 dedicated photovoltaic utilization category, this DC disconnect switch is professionally optimized for frequent DC load breaking. It effectively resists DC electric arcs generated by solar arrays, avoids contact ablation and burnout caused by long-term frequent switching, and solves the common failure problem of ordinary AC switches used in solar DC circuits, greatly extending service life.
3.3 Superior Surge & Short-circuit Resistance
Equipped with 12kV high impulse withstand voltage, it strongly resists lightning surges and transient voltage impacts, protecting downstream inverters and electrical equipment from surge damage. With 8kA/1s short-time withstand current and 20kA peak making capacity, it maintains stable structural performance during system short-circuit faults without deformation or damage, ensuring overall solar system safety.
3.4 Visible Break Design for 100% Operation Safety
The built-in mechanical visible break structure provides a clear disconnection gap when the switch is in OFF state. Maintenance personnel can visually confirm the complete cut-off of DC power, thoroughly eliminating hidden dangers of electric shock and arc flash during equipment inspection, maintenance and overhaul, which complies with global solar power construction safety specifications.
3.6 Heavy-duty & Durable Structure
Adopting thick pure copper conductive components and reinforced insulating shell, the switch has low resistance and low heat generation during long-term full-load operation. The ergonomic rotary safety handle with red warning strip enables quick identification of ON/OFF status. IP20 protection grade prevents accidental finger contact with live parts, ensuring safe daily operation.
3.7 Global Standard Certification & Wide Applicability
Fully compliant with international IEC and EN low-voltage electrical standards, the LMGL3D series disconnect switches have complete export qualifications, suitable for solar engineering projects in Europe, Southeast Asia, Middle East, Africa and other global regions. OEM customized logo and packaging services are available for bulk wholesale customers.
4. Application Scenarios
LMGL3D 2P PV DC disconnect switches are widely used in all types of photovoltaic power generation systems, with targeted model selection for different scenarios:
- 315A Model: Residential rooftop solar systems, small commercial PV power stations, household and small factory solar combiner boxes, off-grid solar energy storage systems
- 630A Model: Large ground-mounted solar farms, industrial & commercial high-power photovoltaic projects, centralized DC distribution cabinets, large-scale solar inverter front-end safety isolation
- General scenarios: Indoor PV distribution box supporting isolation protection, solar power system daily power-off maintenance safety device
5. Installation & Operation Guide
Correct installation and operation ensure stable and long-term service of the PV DC disconnect switch:
- Install the switch vertically inside a standard indoor waterproof PV distribution cabinet, fix it firmly through the bottom mounting holes to avoid shaking.
- Connect the positive and negative cables of the solar PV array to the upper terminals, and connect the load cables leading to the inverter to the lower terminals. Tighten the bolts fully to prevent poor contact and overheating; match large-section cables for the 630A model.
- Rotate the central handle clockwise to the ON position to energize the solar DC circuit for normal power generation operation.
- Rotate the handle counterclockwise to the OFF position to cut off the DC power completely before any equipment maintenance. Confirm the visible break gap to ensure no residual voltage.
- Regularly check terminal tightness and handle flexibility every 6 months to maintain optimal operating performance.
6. Packaging & After-sales Service
- Standard Packaging: 1 piece per independent neutral export carton, bulk carton packaging for wholesale orders to ensure transportation safety
- Custom Service: Support OEM private brand logo printing, customized color boxes and parameter labels
- Warranty Policy: 3-year factory warranty, free replacement for quality defects under standard installation and operating conditions
7. FAQ
Q1: What is the difference between 315A and 630A PV disconnect switches?
The two models share the same voltage grade, protection performance, anti-arc capability and safety standards. The only difference is the rated current. 315A is suitable for small and medium solar systems, while 630A high-current model is designed for large-scale ground solar farms and high-power industrial PV projects.
Q2: Can this switch be used for DC1500V solar systems?
The 315A and 630A models are rated at DC1500V and are fully compatible with DC1000V solar array systems.
Q3: Is this DC isolator suitable for outdoor direct installation?
No. This switch is IP20 rated, designed for indoor cabinet installation only. It must be installed inside a waterproof and dustproof distribution cabinet for outdoor solar projects to avoid rain, dust and UV erosion.
Q4: What are the advantages of PV2/DC-22B grade compared with ordinary switches?
DC-22B/PV2 is a professional photovoltaic DC load break grade. It can withstand frequent DC on-off operations and resist DC arc ablation, which ordinary AC switches cannot achieve. It is the mandatory safety standard for formal solar power systems.
1. Product Brief
The LMGL3D series 2P PV DC disconnect switch is a heavy-duty professional isolation device designed exclusively for solar photovoltaic power systems. Available in two mainstream current specifications: 315A (LMGL3D-315/2P) and 630A (LMGL3D-630/2P), this DC isolator supports a rated voltage of DC 1500V and is compatible with DC 1000V solar arrays.
Certified under DC-22B/PV2 professional photovoltaic utilization category and compliant with IEC & EN 60947-3 international standards, the switch features 12kV high impulse withstand voltage and 8kA short-time withstand current. It provides safe visible circuit breaking, effective anti-arc performance, and stable overload resistance, serving as the core safety protection component for residential, commercial, and large ground-mounted solar power stations.
2. Core Product Specifications (315A VS 630A)
Below are the full technical parameters of LMGL3D series 2P solar DC disconnect switch, covering all key indicators for solar system matching and engineering selection:
Specification Item | LMGL3D-315/2P | LMGL3D-630/2P |
|---|---|---|
Model | LMGL3D-315/2P | LMGL3D-630/2P |
Pole Number | 2 Pole (2P) | 2 Pole (2P) |
Rated Thermal Current | 315A | 630A |
Rated DC Voltage | DC 1500V (Compatible DC 1000V) | DC 1500V (Compatible DC 1000V) |
Impulse Withstand Voltage | 12kV | 12kV |
Short-time Withstand Current | 8kA / 1s | 10kA / 1s |
Peak Making Current | 10kA / 0.15s | 20kA / 0.15s |
Utilization Category | DC-22B / PV2 (Solar Special Grade) | DC-22B / PV2 (Solar Special Grade) |
Protection Grade | IP20 (Indoor Cabinet Installation) | IP20 (Indoor Cabinet Installation) |
Executive Standard | IEC 60947-3, EN 60947-3, GB/T 14048.3 | IEC 60947-3, EN 60947-3, GB/T 14048.3 |
Operating Temperature | -30℃ ~ +70℃ | -30℃ ~ +70℃ |
Terminal Type | Heavy-duty Copper Bolt Terminal | Enhanced Large-size Copper Bolt Terminal |
3. Product Features & Advantages
3.1 Dual Current Specs for Full Solar Scene Coverage
The LMGL3D series provides two current options to meet differentiated project demands. The 315A model is ideal for residential rooftop solar systems, small and medium commercial PV projects, and ordinary combiner boxes. The 630A high-current model is tailored for large industrial photovoltaic power plants, ground-mounted solar farms, and high-power centralized DC distribution systems, covering all mainstream solar power scenarios.
3.2 Professional PV DC Anti-arc Protection
Adopting DC-22B/PV2 dedicated photovoltaic utilization category, this DC disconnect switch is professionally optimized for frequent DC load breaking. It effectively resists DC electric arcs generated by solar arrays, avoids contact ablation and burnout caused by long-term frequent switching, and solves the common failure problem of ordinary AC switches used in solar DC circuits, greatly extending service life.
3.3 Superior Surge & Short-circuit Resistance
Equipped with 12kV high impulse withstand voltage, it strongly resists lightning surges and transient voltage impacts, protecting downstream inverters and electrical equipment from surge damage. With 8kA/1s short-time withstand current and 20kA peak making capacity, it maintains stable structural performance during system short-circuit faults without deformation or damage, ensuring overall solar system safety.
3.4 Visible Break Design for 100% Operation Safety
The built-in mechanical visible break structure provides a clear disconnection gap when the switch is in OFF state. Maintenance personnel can visually confirm the complete cut-off of DC power, thoroughly eliminating hidden dangers of electric shock and arc flash during equipment inspection, maintenance and overhaul, which complies with global solar power construction safety specifications.
3.6 Heavy-duty & Durable Structure
Adopting thick pure copper conductive components and reinforced insulating shell, the switch has low resistance and low heat generation during long-term full-load operation. The ergonomic rotary safety handle with red warning strip enables quick identification of ON/OFF status. IP20 protection grade prevents accidental finger contact with live parts, ensuring safe daily operation.
3.7 Global Standard Certification & Wide Applicability
Fully compliant with international IEC and EN low-voltage electrical standards, the LMGL3D series disconnect switches have complete export qualifications, suitable for solar engineering projects in Europe, Southeast Asia, Middle East, Africa and other global regions. OEM customized logo and packaging services are available for bulk wholesale customers.
4. Application Scenarios
LMGL3D 2P PV DC disconnect switches are widely used in all types of photovoltaic power generation systems, with targeted model selection for different scenarios:
- 315A Model: Residential rooftop solar systems, small commercial PV power stations, household and small factory solar combiner boxes, off-grid solar energy storage systems
- 630A Model: Large ground-mounted solar farms, industrial & commercial high-power photovoltaic projects, centralized DC distribution cabinets, large-scale solar inverter front-end safety isolation
- General scenarios: Indoor PV distribution box supporting isolation protection, solar power system daily power-off maintenance safety device
5. Installation & Operation Guide
Correct installation and operation ensure stable and long-term service of the PV DC disconnect switch:
- Install the switch vertically inside a standard indoor waterproof PV distribution cabinet, fix it firmly through the bottom mounting holes to avoid shaking.
- Connect the positive and negative cables of the solar PV array to the upper terminals, and connect the load cables leading to the inverter to the lower terminals. Tighten the bolts fully to prevent poor contact and overheating; match large-section cables for the 630A model.
- Rotate the central handle clockwise to the ON position to energize the solar DC circuit for normal power generation operation.
- Rotate the handle counterclockwise to the OFF position to cut off the DC power completely before any equipment maintenance. Confirm the visible break gap to ensure no residual voltage.
- Regularly check terminal tightness and handle flexibility every 6 months to maintain optimal operating performance.
6. Packaging & After-sales Service
- Standard Packaging: 1 piece per independent neutral export carton, bulk carton packaging for wholesale orders to ensure transportation safety
- Custom Service: Support OEM private brand logo printing, customized color boxes and parameter labels
- Warranty Policy: 3-year factory warranty, free replacement for quality defects under standard installation and operating conditions
7. FAQ
Q1: What is the difference between 315A and 630A PV disconnect switches?
The two models share the same voltage grade, protection performance, anti-arc capability and safety standards. The only difference is the rated current. 315A is suitable for small and medium solar systems, while 630A high-current model is designed for large-scale ground solar farms and high-power industrial PV projects.
Q2: Can this switch be used for DC1500V solar systems?
The 315A and 630A models are rated at DC1500V and are fully compatible with DC1000V solar array systems.
Q3: Is this DC isolator suitable for outdoor direct installation?
No. This switch is IP20 rated, designed for indoor cabinet installation only. It must be installed inside a waterproof and dustproof distribution cabinet for outdoor solar projects to avoid rain, dust and UV erosion.
Q4: What are the advantages of PV2/DC-22B grade compared with ordinary switches?
DC-22B/PV2 is a professional photovoltaic DC load break grade. It can withstand frequent DC on-off operations and resist DC arc ablation, which ordinary AC switches cannot achieve. It is the mandatory safety standard for formal solar power systems.
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