DNH9 Fuse Disconnector Switch 250A GRL Supplier

Mode:

DNH9-250

Rated operational voltage:

AC415V/AC690V

Rated operational current：

250A

Rated Insulation Voltage (Ui)：

1000V

Number of poles:

1P/2P/3P/4P

Certification:

Email:

[email protected]

fused disconnect switch

isolation switch

fuse holder

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Description

DNH9 Fuse Disconnector Switch Overview

Introduction

The DNH9 fuse Disconnector Switch is designed for distribution and motor circuits with high short-circuit currents. It serves multiple roles, including power switching, isolation switching, and emergency switching. Complying with national and international standards (GB/T 14048.3 and IEC/EN60947-3), the DNH9 offers robust protection and exceptional performance in various industrial and electrical applications.

Technical Parameter

Parameter	DNH9-160	DNH9-250
Rated Working Voltage (Ue)	230V AC / 415V AC / 1000V DC	415V AC / 690V AC
Rated Working Current (Ie)	160A	250A
Agreed Heating Current (Ith)	160A	250A
Rated Limited Short-Circuit Current (with fused core)	100kA	100kA
Usage Category (with fused core)	AC-23B / DC-21B	AC-23B
Rated Insulation Voltage (Ui)	1000V	1000V
Rated Impulse Withstand Voltage (Uimp)	12kV	12kV
Rated Frequency	50/60Hz	50/60Hz
Electrical Lifespan	200 cycles	200 cycles
Maximum Torque	30 Nm	30 Nm
Fuse Standard	IEC60269-2 / GB/T 13539.2	IEC60269-2 / GB/T 13539.2
Power Consumption	23W	≤32W
Surrounding Air Temperature	-5°C to +40°C	-5°C to +40°C
Altitude	≤2000m	≤2000m
Pollution Level	III, IV	III, IV
Transportation and Storage	-25°C to +55°C	-25°C to +55°C

Certificate

Click here to download the DNH9 Fuse Switch Disconnector certification

DNH9 Fuse Disconnector Switch Features

1、Versatile Functionality: Suitable for distribution circuits, motor circuits, and emergency circuit protection, ensuring reliable performance under high short-circuit currents.

2、Compliance with Standards: Fully meets GB/T 14048.3 and IEC/EN60947-3 requirements, offering confidence in quality and performance.

3、Robust Construction: Designed for high durability with an electrical lifespan of up to 200 cycles and support for up to 100kA short-circuit currents.

4、Wide Operating Range: Rated voltage up to 1000V DC and 690V AC, with support for ambient temperatures from -5°C to +40°C.

5、Compact Design: Compact and ergonomic for seamless integration into electrical systems, with flexible installation options.

Operating Conditions

Ambient Temperature: -25°C to +55°C; capacity reduction may be required for temperatures beyond this range.
Humidity: Maximum relative humidity of 50% at 40°C, up to 90% at 20°C for lower temperatures.
Altitude: Operates reliably at altitudes ≤2000m.
Environmental Requirements: Free from explosive or corrosive gases, significant vibrations, or exposure to rain or snow.
Pollution Level: Rated for levels III and IV, ensuring resilience in harsh conditions.
Installation Stress: External cables and busbars should be supported independently to avoid additional stress on the switch.

Application Scenarios

The DNH9 Fuse Switch Disconnector is ideal for:

Industrial motor circuits require robust circuit protection.
Distribution networks with high fault current potential.
Emergency circuit isolation in power systems.
High-performance AC and DC protection in demanding environments.

Precautions

Ensure proper alignment during installation to prevent mechanical stress.
For use in extreme environments, consult with the manufacturer for appropriate configurations.
Periodically inspect the fuse core and terminals to maintain optimal performance.