Photovoltaic Isolated DC Switch Factory

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Photovoltaic Isolated DC Switch

Scope of Application: Suitable for AC 50Hz~60Hz environments, with rated operating voltages covering 300V/600V/800V/1000V/1200V.  Suitable for indoor and outdoor EL environments, and classified as DC-PV1/DC-PV2.
Product Application:  Controls the opening and closing of switch contacts through an electromagnetic system to achieve current isolation and conduction, ensuring the stable operation of the photovoltaic system. In case of leakage or short circuit faults on the DC side, it can quickly respond and cut off the fault current, effectively protecting system safety and preventing equipment damage.

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About Us
Zhejiang Zhuochao Electric Co., Ltd.
Zhejiang Zhuochao Electric Co., Ltd.
Founded in 2012, Zhejiang Zhuochao Electric Co., Ltd. has been specializing in the manufacture and sale of universal change-over switches, combination switches, power disconnect switches, load break switches and welding machine switches. In particular, the company's Photovoltaic Isolated DC Switch feature advanced technology in the industry in the industry. Our products have obtained ISO 9001 Quality Management System Certification, National 3C Certification, TUV Certification, CE Certification and RoHS Certification, and are manufactured in strict compliance with national standards. They enjoy a strong market presence across China and are exported to numerous countries and regions in Europe, the Americas and Southeast Asia. We have also established cooperative partnerships with a number of internationally renowned brands.
Equipped with advanced production equipment and precision testing instruments, the company has introduced high-tech production processes and experienced engineers, providing support for product R&D, quality upgrading and management innovation. Thanks to the joint efforts of all employees and the strong support of domestic and overseas customers, we have accumulated rich experience in design, production and manufacturing. Currently, the company is committed to further expanding its overseas market share, and developing domestic market channels and customers. It also try to innovate marketing strategies, and build a sound market order to fully safeguard the interests of agents and customers. We unswervingly adhere to a clear market positioning, focus on two core points—technology innovation & reliable quality and marketing channel enhancement, and regard quality product, standardized market pricing and comprehensive after-sales service as three three fundamental commitments, so as to create a win-win development situation for both manufacturers and distributors.
Facing a promising future, the company will uphold the tenet of providing better products and services to satisfy customers. Relying on advanced modern enterprise management, we will deepen internal reforms, fully implement the quality assurance system, and carry forward the spirit of "Pragmatism, Integrity, Innovation and Progress". Looking ahead, we will continuously adjust the industrial structure, expand capital strength, implement the brand strategy, and march towards the global market!
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Industry knowledge

Photovoltaic Isolated DC Switches are not only utilized in traditional ground-mounted power stations but also widely deployed across diverse scenarios, including distributed rooftop systems, electric vehicle (EV) charging systems, and integrated energy storage systems.

Varying application environments impose distinct requirements on switch performance; for instance, high-temperature desert regions prioritize weather resistance and dust protection ratings, whereas coastal areas place greater emphasis on corrosion resistance. This diversity in applications has driven the segmentation of product structures and technological approaches.

Product Structure and Technical Classification

From the perspectives of structure and function, Photovoltaic Isolated DC Switches can be categorized into the following types:

1. Classified by Installation Method

  • Built-in Type (Integrated)

Integrated directly into the inverter unit (e.g., PV Inverter Load Switch).

Advantages: Space-saving, convenient installation.

Disadvantages: Complex maintenance and replacement procedures.

  • External Type (Standalone)

Installed independently within a combiner box or on the DC side.

Advantages: Easy maintenance and inspection, clear safety isolation.

Disadvantages: Increased wiring costs.

2. Classified by Voltage Level

  • Low Voltage (≤1000V DC)
  • Medium Voltage (1000V–1500V DC)
  • High Voltage (Customized, ≥1500V DC)

3. Classified by Operation Method

  • Manual Operation
  • Electric Remote Control
  • Intelligent Interlinked Control (Integrated with EMS)

Analysis of Core Performance Indicators

To satisfy the requirements of various systems, the design of Photovoltaic Isolated DC Switches must prioritize the following key performance indicators:

  • Rated Current and Voltage
  • Breaking Capacity
  • Insulation Strength
  • Temperature Rise Control
  • Mechanical and Electrical Lifespan

Furthermore, in high-power-density systems, the thermal management design and arc suppression capabilities of PV DC Isolator Switches are particularly critical, as these factors directly impact the safety and stability of the equipment.

Industry Standards and Certification Systems

Various countries and regions have established rigorous certification standards for photovoltaic DC isolator switches, primarily including:

  • IEC 60947-3 (International Standard for Low-Voltage Switchgear)
  • UL 508i (North American Market)
  • TÜV Certification (European Market)
  • GB/T (Chinese National Standards)

These standards not only regulate product performance but also establish market entry thresholds, thereby driving the industry toward high-quality development. VI. Comparative Analysis of Typical Applications

Application Scenario Functional Requirements Recommended Type Key Features
Ground-mounted Power Stations High Voltage, High Current External PV DC Isolator Switch High stability, easy maintenance
Commercial & Industrial Rooftops Space-constrained, Flexible Installation Integrated PV Inverter Load Switch Compact design, space-saving
Residential PV Systems Cost-sensitive, Simple Operation Manual Isolator Switch High cost-effectiveness, easy to operate
Energy Storage Systems High Safety, Rapid Response Intelligent Control Isolator Switch Supports remote and automated control

Technical Development Trends

As the complexity of new energy systems increases, Photovoltaic Isolated DC Switches are evolving in the following directions:

1. Intelligence

  • Integration of sensors and communication modules
  • Support for remote monitoring and fault diagnosis

2. High Voltage Adaptability

  • Compatibility with systems of 1500V and above
  • Enhancement of insulation and arc-extinguishing technologies

3. Modular Design

  • Facilitates rapid installation and replacement
  • Reduces maintenance costs

4. Safety Redundancy Design

  • Dual-break-point structure
  • Mechanisms to prevent accidental operation

Selection and Application Recommendations

When selecting the appropriate Photovoltaic Isolated DC Switch for actual projects, the following factors should be prioritized:

  • System voltage and current matching
  • Installation environment (temperature, humidity, IP protection rating)
  • Requirement for remote control functionality
  • Compatibility with the inverter or overall system (e.g., integration requirements for PV Inverter Load Switches)

Proper product selection not only enhances system safety but also reduces long-term operation and maintenance costs.

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