DC Isolator Switch Manufacturer
In the rapidly evolving landscape of renewable energy, particularly solar photovoltaics (PV), safety and reliability are paramount. Ensuring the protection of valuable equipment and, more importantly, personnel, requires components engineered to the highest standards. Since 2015, VIOX ELECTRIC has established itself as a leading DC isolator switch manufacturer, driven by a singular, unwavering mission: to safeguard photovoltaic systems worldwide with precision-engineered, high-performance safety components. Our dedication to quality, innovation, and customer support has made VIOX DC isolator switches a trusted choice for installers, engineers, and project managers across the globe.
Certified By
VIOX DC Isolator Switch VOPV
A Brief Self-Nomination: Why Choose VIOX Electric?
Since 2015, VIOX Electric has been a leading DC isolator switch manufacturer with a singular mission – protecting your photovoltaic systems with precision-engineered safety components. Our DC isolator switches are trusted worldwide for:
- Superior Safety Performance: With arcing time less than 8ms, our DC isolators provide exceptional protection against electrical hazards.
- Durability & Reliability: Mechanical life up to 18,000 operations and electrical life of 2,000 cycles.
- Industry-Leading Voltage Capacity: Maximum operating voltage up to 1200V DC, standing out among similar products.
- Certification Compliance: All products meet IEC60947-3 and AS60947.3 international standards.
- Versatile Application: Ideal for 1-20kW residential and commercial photovoltaic installations.
VIOX FULL RANGE of Isolator Switch
Our comprehensive range of DC isolator switches meets diverse installation requirements:
Indoor Din-Rail Mounted Series
- L1 Series: Classic design with lockable handle in “OFF” position
- L2 Series: Enhanced design with improved operational stability
- NL1/T Series: Ultra-thin handle design for space-constrained installations
- NL1 Series: Compatible with 4P CB4N or CB8N switch bodies
Outdoor Weatherproof Series
- ELR1 Series: IP66 rated enclosure with UV resistance and air valve for temperature reduction
- ELR2 Series: Streamlined IP66 rated design with multiple connection options
All series available in 16A, 25A, and 32A current ratings with voltage options of 300V, 600V, 800V, 1000V, and 1200V DC.
VIOX DC Isolator Switches More details presented
IP66
PV DC Switch Ambient air temperature -40°C~85°C The 24-hour average temperature does notexceed 40°C
Inside of DC Isolator Switch
Every detail showcases craftsmanship.
Flame-retardant shell
Safety flame-retardant, high-temperature resistant, low-temperature resistant
VIOX DC Isolator Switch DIMENSIONS AND SIZE CHART
| Feature | L1 Series | L2 Series | NL1/T Series | NL1 Series | ELR1 Series | ELR2 Series |
|---|---|---|---|---|---|---|
| Model Numbers | VOPV16-L1 VOPV25-L1 VOPV32-L1 | VOPV16-L2 VOPV25-L2 VOPV32-L2 | VOPV16-NL1/T VOPV25-NL1/T VOPV32-NL1/T | VOPV16-NL1 VOPV25-NL1 VOPV32-NL1 | VOPV16-ELR1 VOPV25-ELR1 VOPV32-ELR1 | VOPV16-ELR2 VOPV25-ELR2 VOPV32-ELR2 |
| Application | 1-20kW PV systems | 1-20kW PV systems | 1-20kW PV systems | 1-20kW PV systems | 1-20kW PV systems | 1-20kW PV systems |
| Mounting Type | Din rail | Din rail | Din rail | Din rail | Wall mount with 2 mounting tabs | Wall mount |
| Protection Level | IP20 | IP20 | IP20 | IP20 | IP66, UV Resistant | IP66, UV Resistant |
| Distinctive Feature | Standard handle design | Yellow/red handle | Ultra-thin handle | Compatible with 4P CB4N or CB8N switch bodies | 4 x M25 threaded holes | 4 x M20 knock holes |
| Handle Lock | Can be locked in “OFF” position | Can be locked in “OFF” position | Not specified | Not specified | Can be padlocked in “OFF” position | Can be padlocked in “OFF” position |
| Special Features | – | – | – | – | MC4 plugs with adaptor or cable gland option; IP66 Air valve for temperature reduction | MC4 plugs option |
| Width (mm) | 95 | 95 | 75 | 87.3 | 172 | 155.2 |
| Height (mm) | 95 | 95 | 75 | 87.3 | 188 | 170 |
| Depth (mm) | 64 | 64 | 65 | 60 | 110 | 110 |
| Specification | Details |
|---|---|
| Standards | IEC60947-3, AS60947.3 |
| Utilization Categories | DC-PV2, DC-PV1, DC-21B |
| Pole Options | 2-pole, 4-pole (Single or Double String) |
| Rated Frequency | DC |
| Rated Operational Voltage (Ue) | 300V, 600V, 800V, 1000V, 1200V DC |
| Rated Insulation Voltage (Ui) | 1200V |
| Conventional Enclosed Thermal Current (Ithe) | Same as Ie |
| Rated Short-time Withstand Current (Icw) | 1kA, 1s |
| Rated Impulse Withstand Voltage (Uimp) | 8.0kV |
| Overvoltage Category | II |
| Suitability for Isolation | YES |
| Polarity | No polarity, “+” and “-” polarities could be interchanged |
| Mechanical Life | 18,000 operations |
| Electrical Life | 2,000 operations |
| Arcing Time | Less than 8ms |
VIOX DC Isolator Switch Step-by-Step Installation
Proper installation ensures optimal performance of your DC isolator switch:
Select the Right Configuration:
Choose from 2P (2-pole), 4P (4-pole), 4T (input/output bottom), 4B (input/output top), 4S (input top/output bottom), or 2H (4 paralleled poles) based on your system requirements.
Mounting the Isolator:
- For Din-rail models (L1, L2, NL1/T, NL1): Clip onto standard 35mm Din rail
- For Enclosed models (ELR1, ELR2): Use mounting tabs to secure to wall or enclosure
Wiring Connection:
- Follow the wiring diagram specific to your chosen configuration
- Ensure proper tightening of all connections before energization
- For bridging link installations, refer to our correct installation guideline
Voltage/Current Verification:
- Confirm your system voltage and current match the isolator ratings
- For example, at 1000V DC, VOPV32 series can handle up to 10A in 2P/4P configuration
Testing Operation:
- Verify smooth operation of the handle mechanism
- Confirm the lockable function works properly in the “OFF” position
Label the Switch
Clearly label the isolator switch for easy identification during future use or emergencies
For detailed installation videos and troubleshooting guidance, visit the Technical Resources section of our website.
Get Your FreeDC Isolator Switch Sample!
We provide samples for free, you just need to tell us what you need
More Than Just a DC Isolator SwitchManufacturer
At VIOX, we go beyond manufacturing DC Isolator Switch by offering a suite of value-added services tailored to meet your project needs. Our commitment to excellence ensures that every customer receives personalized attention, expert guidance, and seamless support throughout their journey with us.
Service Consultation
Whether your DC Isolator Switch requirements are straightforward or complex, our team provides expert advice and technical consultation. For more intricate projects, we offer in-depth engineering support to ensure optimal product selection and application.
Product Recommendations
Unsure which DC Isolator Switch suits your PV system? Our specialists provide free, customized recommendations based on your specific operational and environmental requirements, ensuring you get the perfect fit.
Logistics Support
If you lack a reliable freight forwarder, we can arrange transportation from our factory to your project site at no extra cost. Our logistics team ensures timely and secure delivery to keep your project on schedule.
Installation Support
Need help with installation? Our technical team is available to answer your questions or provide hands-on support. For larger projects, we can even dispatch an engineer to your site for on-the-ground assistance.
Frequently Asked Questions
We have compiled some common questions from our clients. If your question isn’t included here, our customer service is always available to help. We’d love to talk with you.
How Can I Get a Quote for the DC Isolator Switch
To get a quote for our DC Isolator Switch, contact our customer service team. We are available 24/7. Just provide the specifics of your order like the type, size, and quantity. We’ll guide you through the entire ordering process.
What is Your MOQ for the Order?
We have a low MOQ or minimum order quantity. You can order as little as one unit, and we will deliver according to your specifications.
What Is the Turnaround Time for My Order?
The standard turnaround time for our DC Isolator Switch is 7 to 10 business days. Delivery time may extend by up to 15 business days due to transit. For custom or bulk orders, we can discuss the turnaround time before finalizing your order.
Can I Get a Sample Before Placing the Order?
Yes, we provide samples for evaluation and approval. Creating samples typically takes 3 to 7 business days.
Can You Make Customized DC Isolator Switch
Yes, we offer customized DC Isolator Switch. Let us know your requirements, and our expert customer service team will work with you through the design process.
What is Your Warranty for the DC Isolator Switch
We offer a 1-year warranty on all DC Isolator Switch we produce. This ensures we deliver high-quality products. Every product is thoroughly tested before delivery.
KNOWLEDGE About DC Isolator Switch
What is a DC Isolator
A DC isolator switch is a specialized electrical device designed to safely disconnect direct current power sources from circuits or equipment. It consists of conductive contacts and an operating mechanism, typically a rotary handle, that enables rapid isolation of the load from the power source. These switches are crucial for maintenance, fault diagnosis, and emergency situations, allowing technicians to work on electrical systems without the risk of electric shock or equipment damage. DC isolators are commonly rated for voltages up to 1500V DC and currents up to 32A, making them suitable for a wide range of applications in renewable energy systems and industrial settings.
DC Isolator Components
DC isolator switches consist of several key components that work together to ensure safe and effective isolation of DC power sources:
Conductive contact section: Comprises multiple sets of dynamic and static contactors that enable rapid connection and disconnection
Operating mechanism: Typically a rotary handle that drives the contactors
Enclosure: A protective housing made of insulating materials, often UV-resistant and weatherproof for outdoor applications
Arc chutes: Plate-like extensions that help extinguish electric arcs created during contact movement
Terminal connections: Points where incoming and outgoing conductors interface with the switch
Lockout-tagout mechanism: A safety feature preventing accidental operation during maintenance
These components are designed to handle specific DC voltage levels and current ratings, ensuring optimal performance and safety in various applications such as photovoltaic systems and battery energy storage solutions.
Types of DC Isolator Switches
Three main types of DC isolator switches are commonly used in various applications:
Battery Isolation Switches: Specifically designed for safely disconnecting power in battery systems, these switches are crucial for maintenance and emergencies in off-grid setups and electric vehicles.
DC Disconnect Switches: Widely employed in solar installations, these switches allow for the safe isolation of photovoltaic panels from inverters during maintenance or fault conditions.
Circuit Breaker Isolation Switches: Engineered for high-voltage applications, these switches combine the functionality of a circuit breaker with isolation capabilities, offering both overcurrent protection and the ability to safely disconnect equipment.
Each type is tailored to specific requirements, ensuring optimal safety and functionality in their respective applications.
DC Isolator Operating Principle
DC isolator switches operate through a simple yet effective mechanism to safely disconnect DC power sources. When activated, the switch’s contacts physically separate, creating an air gap that interrupts the flow of current1. This process involves:
Initial closed position with contacts connected and conducting current
Activation of the operating mechanism, either manually or remotely
Separation of contacts, creating an air gap to interrupt current flow
Potential electric arc generation, which is extinguished by arc chutes
Full separation, resulting in an open position with the circuit isolated from the DC power source
The switch’s rapid connection and disconnection capabilities, achieved through handle rotation, allow for swift isolation in emergency situations2. This visible break serves as a clear indication of the circuit’s disconnected state, enhancing safety protocols in various DC applications such as photovoltaic systems and battery storage units.
Installation and Safety Tips
To install a DC isolator switch, gather essential tools including a screwdriver, wire stripper, insulated cables, cable glands, and a mounting box or enclosure. Begin by identifying and turning off the power source, then mount the switch in an accessible location. Connect cables to corresponding terminals, ensuring tight and secure connections, and use cable glands for protection. After installation, test the circuit and clearly label the switch for easy identification.
Safety is paramount when working with DC isolator switches. Always turn off power before handling electrical components, use insulated tools, and wear protective gear such as gloves and safety glasses. Consult a qualified electrician if unsure about installation procedures, and ensure compliance with local electrical codes and standards. Regular maintenance, including inspections for corrosion, damage, and proper functioning of the arc suppression mechanism, is crucial for maintaining operational safety and efficiency.
Common Installation Mistakes and How to Avoid Them
When installing DC isolator switches, common mistakes can lead to serious safety hazards and system failures. One frequent error is improper sealing, which can result in water ingress, causing corrosion and potential electrical failures. To prevent this, ensure top-entry enclosures are used and conduits are correctly glued, especially in outdoor installations.
Another critical mistake is incorrect wiring, which can create loose connections or arcing faults. To avoid this:
Always turn off power before installation
Follow manufacturer guidelines for specific wiring configurations
Use appropriate cable sizing and insulated cables rated for the system’s voltage
Secure connections using cable glands to prevent loosening
Perform a continuity test after installation to ensure proper wiring
Additionally, failing to consider environmental factors like prolonged sun exposure can degrade isolator materials over time. To mitigate this, use UV-resistant materials and consider the placement of the isolator to minimize direct sunlight exposure.
Choosing DC Isolator Switches
When selecting DC isolator switches for your photovoltaic (PV) project, consider these key factors:
Voltage and current ratings: Choose a switch that exceeds the maximum open-circuit voltage (Voc) of your solar panels and can handle the system’s maximum current.
Environmental protection: Opt for switches with appropriate IP ratings for outdoor installations, ensuring durability against dust and moisture.
Compliance and certification: Select switches that meet international standards like IEC 60947-3 and have recognized certifications.
Arc suppression: Look for switches with effective arc extinguishing mechanisms to enhance safety during disconnection.
Installation compatibility: Ensure the switch offers flexible mounting options and is compatible with your system’s components.
By carefully evaluating these criteria, you can select a DC isolator switch that enhances the safety and reliability of your PV installation while complying with industry standards.
DC Isolator Switch Benefits
DC isolator switches offer several advantages over other types of switches in renewable energy systems and DC applications:
Enhanced safety: DC isolators provide a visible and physical disconnect point, significantly reducing the risk of electrical shock during maintenance or emergencies. Their ability to safely isolate circuits allows technicians to work on systems without the danger of unexpected power flow.
Cost-effectiveness: Due to their simple structure compared to more complex protection devices like circuit breakers, DC isolator switches are an economically practical solution for electrical isolation.
Compliance with electrical codes: Implementing DC isolator switches ensures regulatory compliance, enhancing overall system safety and reliability.
Fault isolation: In the event of a system fault, DC isolators can quickly disconnect the power source, minimizing damage to components and improving system reliability.
Flexibility: DC isolators often feature remote operation capabilities, allowing for convenient control from a central location, which is particularly useful in large-scale installations.
These advantages make DC isolator switches essential components in solar PV systems, battery storage solutions, and other DC applications, offering a balance of safety, efficiency, and cost-effectiveness.
Maintenance Schedule for Isolators
DC isolator switches should be inspected and maintained regularly to ensure their proper functioning and safety. The Clean Energy Council (CEC) recommends an annual maintenance schedule for solar systems, including DC isolators. However, some experts suggest that this frequency may be excessive for well-installed systems.
For most residential solar installations, inspecting and maintaining DC isolator switches every five years is generally sufficient. This schedule balances safety concerns with practical considerations. However, more frequent inspections may be necessary if:
You notice a change in system performance
The system generates warnings or alerts
There’s a build-up of debris around the isolator
You suspect damage from wildlife or weather
Regular maintenance should include checking for signs of wear, corrosion, or physical damage, cleaning the isolator, and ensuring all connections are tight. It’s crucial to have these inspections performed by a licensed electrician, preferably one accredited by the Clean Energy Council, to ensure compliance with safety regulations.
Testing DC Isolator Function
To test if a DC isolator switch is functioning correctly, follow these steps:
Safety first: Ensure the system is de-energized and use appropriate personal protective equipment.
Visual inspection: Check for any visible damage, corrosion, or loose connections.
Continuity test: Use a multimeter set to continuity mode. With the switch in the “ON” position, test between corresponding terminals. You should hear a beep indicating continuity. In the “OFF” position, there should be no continuity.
Insulation resistance test: Using an insulation tester, apply the appropriate DC voltage between terminals and measure the resistance. The reading should meet the manufacturer’s specifications.
Operational test: If safe to do so, energize the system and verify that the isolator effectively disconnects the power supply when switched off.
Always consult the manufacturer’s guidelines and local electrical codes when performing tests. If in doubt, seek assistance from a qualified electrician.
Yueqing’s DC Isolator Switch Dominance
Yueqing, a city in Zhejiang province, China, has become a key player in the global DC isolator switch market, driven by its thriving electrical manufacturing industry with a focus on photovoltaic (PV) components. Prominent manufacturers like Yueqing VIOX Electric Co., Ltd. have played a significant role in this growth. Companies in Yueqing produce a diverse range of DC isolator switches, from 600V to 1500V ratings, meeting various PV system needs and securing numerous international certifications such as ISO9001, CE, TUV, and CB, which bolster their global competitiveness.
Yueqing’s DC isolator switches are exported to over 120 countries, with strong market presence in regions like the Middle East, Southeast Asia, and South America. Although specific market share data is unavailable, the concentration of manufacturers and their extensive operations indicate that Yueqing commands a significant share of global DC isolator switch production for solar PV applications.
DC Isolator Switch Manufacturing Process Overview
The production process of DC isolator switches involves several key steps to ensure quality and reliability:
Component manufacturing: Precision-engineered parts like contacts, springs, and housings are produced using advanced manufacturing techniques.
Assembly: Components are carefully assembled in a controlled environment, often using automated processes to ensure consistency.
Quality control: Each unit undergoes rigorous testing, including continuity checks, insulation resistance tests, and operational verification.
Enclosure fitting: Switches are sealed in weatherproof enclosures, typically rated IP66 for outdoor use in solar installations.
Final inspection: Completed units are subjected to a final round of testing and visual inspection before packaging.
Throughout the process, manufacturers like VIOX employ meticulous pre-assembly inspections and utilize digital intelligent image detection and laser detection technologies to maintain high quality standards. This attention to detail ensures that DC isolator switches meet the stringent safety and performance requirements of solar PV systems and other DC applications.
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VIOX Electric is ready to assist you with your OEM DC Isolator Switch needs. We offer high-quality and cost-effective solutions.
