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The DNH1-1600/3 Fuse Switch Disconnector from GRL is a heavy-duty switching and isolation device engineered for industrial electrical protection in low-voltage power distribution systems. Designed for rated currents of 800A, 1000A, 1250A, and 1600A, it delivers reliable performance in demanding environments such as manufacturing plants, substations, renewable energy installations, and large-scale machinery systems.
With compliance to IEC60947-3 and GB/T 14048.3, this fuse switch disconnector combines the safety of isolation with the robustness of load-breaking capability. It is suitable for AC-21B (AC690V), AC-22B (AC400V), and DC-21B (DC440V) usage categories, offering exceptional versatility for both AC and DC applications.
| Parameter | Value |
|---|---|
| Rated Current (In) | 800A / 1000A / 1250A / 1600A |
| Rated Voltage (Ue) | 690V |
| Rated Insulation Voltage (Ui) | 1000V |
| Rated Impulse Withstand Voltage (Uimp) | 12 kV |
| Conventional Thermal Current (Ith) | 1600A |
| Usage Category | AC-21B (AC690V), AC-22B (AC400V), DC-21B (DC440V) |
| Mechanical Lifespan | 600 operations |
| Operating Temperature | -25°C to +55°C |
| Dimensions (W×H×D) | 380 × 355 × 240 mm |
| Weight | 13.5 kg (without fuse) / 22.5 kg (with fuse) |
1. Wide Current Range for Flexible Applications
Available in 800A, 1000A, 1250A, and 1600A configurations, the DNH1-1600/3 adapts to a variety of industrial setups. This range enables system designers to precisely match the switch to the load requirements, thereby improving safety and efficiency.
2. Load-Break Operation
The switch can be operated under full load, allowing for safe isolation during maintenance without the need to shut down the entire system. This feature reduces downtime and ensures uninterrupted productivity.
3. Compliance with International Standards
Certified to IEC60947-3 and GB/T 14048.3, the device meets global safety and performance requirements, making it suitable for international projects and installations.
4. Heavy-Duty Design for Harsh Environments
With an operating temperature range of -25°C to +55°C, the DNH1-1600/3 maintains consistent performance in extreme conditions, from cold storage facilities to high-temperature industrial zones.
5. Enhanced Safety Features
The integrated locking device prevents unauthorized operation, reducing the risk of accidents. Its durable construction and precision engineering ensure long-term reliability.
6. Compact and Robust Construction
With dimensions of 380 mm width, 355 mm height, and 240 mm depth, the switch offers a space-efficient design for switchboards and panel assemblies. The unit weighs 13.5 kg without a fuse and 22.5 kg with fuse, making installation and handling easier.
The DNH1-1600/3 Fuse Switch Disconnector is widely used in:
Mining and heavy industry where rugged reliability is essential
As a leading manufacturer of industrial electrical protection devices, GRL provides fuse switch disconnectors that combine:
High breaking capacity to handle fault conditions safely
Long service life under continuous operation
International certification for global market compliance
Customizable configurations for different voltage and current ratings
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