GRL DC Isolator Switch DNH50-50/4 1500V DC, designed for photovoltaic system disconnection and central inverter protection

📜 General Product Description  

The GRL DNH50-50/4 DC Circuit Breaker is a dedicated disconnect switch for solar power systems and electrical systems operating at voltages up to DC 1500V and currents up to 50A.

This switch is designed for non-frequent connection and isolation operations with the goal of protecting electrical circuits and preventing fault transmission. It is commonly used inside Photovoltaic Inverter systems.

⚙️ Key Technical Specifications  

• Product Type: DC Disconnect Switch
• Rated Voltage: Up to DC1500V
• Rated Current: Up to 50A
• Primary Application: Solar Power Systems – DC Line Isolation and Disconnection
• Usage: Non-frequent connection and disconnection for the purpose of isolation and protection
• Internal Components: Magnetic Arc Extinction Mechanism + Gas Exhaust Channel

✨ Product Features and Characteristics

1. "Zero Arcing" Technology – No Electric Arc

• The switch relies on a design that achieves complete extinction of the electric arc during the disconnection process.
• It reduces the risk of sparking and overheating.
• It allows for a more compact and safer design within the electrical system.
• It prevents the formation of ionized gases or metallic particles that may cause damage to the Inverter's PCB components.

2. Arc Extinction Mechanism

The spark resulting from disconnection is suppressed via:

• Magnetization (Magnetic Blowout)
• Arc Elongation + Cooling
• Expelling gases and ions through a dedicated Exhaust Channel. This process prevents the accumulation of deposits on the internal inverter boards and protects the circuit from a short circuit.

3. High Inverter Protection

• It prevents the deposition of metallic particles and ionized materials on the control boards.
• It extends the lifespan of the inverter and maintains the safety of its internal components.

4. Multiple Pole Options According to Connection

It comes in different models to suit all types of connections in solar power systems:

• 2-Poles (Layers): Series connection
• 4-Poles (Layers): Series connection

This flexibility makes the switch suitable for small, medium, and large systems.

5. Simple and Safe Installation

• Clear connection instructions according to the selected number of poles.
• Compatible with all common PV systems.

⚡ Key Applications

• Solar PV Systems
• DC Combiner Box
• Protecting DC lines before the inverter
• High Voltage DC systems up to 1500V