DNH50-50 DC Isolate Switch 1500VDC 50A PV System Disconnection Concentrated Inverter Protection

DC Isolate Switch Key Features

• Arc-Free Operation: Zero arc during switching, ensuring safety for operators and system components.
• Wide Voltage Range: Available in 600V, 700V, 800V, 1200V, and 1500V DC versions.
• Robust Design: Flame-retardant nylon casing (UL94 V-0 rated) offers superior thermal and environmental resistance.
• Flexible Mounting: Supports both rail and screw installation, fitting seamlessly into various DC cabinet layouts.
• Compact Form Factor: Ideal for space-limited PV inverters, combiner boxes, and battery energy storage cabinets.

Looking for a safe and efficient DC disconnection solution?

GRL DNH50-50 DC Isolate Switch is a cutting-edge arc-free isolator designed specifically for photovoltaic (PV) systems and battery energy storage systems (BESS). This model offers enhanced safety and durability, making it ideal for high-voltage DC applications up to 1500V.

Unlike traditional DC isolator switches, the DNH50-50 DC Isolate Switch features a zero-arc switching mechanism, which eliminates arcing during operation and significantly reduces maintenance risks and fire hazards. This makes it especially suitable for environments where reliability and operator safety are non-negotiable—such as off-grid PV installations, inverter cabinets, and ESS enclosures.

With a flame-retardant nylon enclosure (UL94 V-0), the DNH50-50 isolating switch maintains its stability and structural integrity under high temperatures and harsh environmental conditions. The compact design supports both DIN rail and panel-mounted installation methods, allowing for versatile integration into new or existing DC systems. Rated current is 50A, with available voltage levels of 600V, 700V, 800V, 1200V, and 1500V DC.

GRL has rigorously tested this product to meet stringent quality and electrical safety standards. Whether you’re developing a residential rooftop array, an industrial-scale PV plant, or a modular battery system, the DNH50-50 DC Isolate Switch delivers safe, fast, and reliable isolation for maintenance, emergency shutdown, and fault protection.

Compliance Standards

– GB/T14048.1 Low-voltage switchgear and controlgear – Part 1: General rules
– GB/T14048.3 Switches, disconnectors, switch-disconnectors, and fuse-combination units
– IEC60947-1 Low-voltage switchgear and control gear – Part 1: General rules
– IEC60947-3 Switches, disconnectors, switch-disconnectors and fuse-combination units

Electrical Symbols

– Disconnect switch (connection, disconnection, and isolation)

Environmental Conditions
– Ambient temperature for normal operation: -40°C to +75°C. If the ambient temperature exceeds +75°C or falls below -40°C, users should consult with the manufacturer.
– Storage temperature: -50°C to +85°C

Protection Rating
– Product protection rating: IP20
– Handle protection rating: IP66

Pollution Degree
– 3

Relative Humidity

– Atmospheric relative humidity should not exceed 50% at an ambient temperature of +40°C. Higher relative humidity is permissible at lower temperatures.

For example, relative humidity can reach 90% at an ambient temperature of 20°C.
Special protective measures should be taken by users for occasional condensation caused by temperature changes.