Horizontal fuse switch disconnector holder block | fuse disconnector | 3F | 400A | 690V | for NH2 fuses | on busbar

Technical Specifications
General Characteristics

Rated Operating Voltage (Ue): AC 400V / AC 690V
Rated Operating Current (Ie): 400A  
Rated Insulation Voltage (Ui): 1000V
Rated Impulse Withstand Voltage (Uimp): 12kV
Operating Frequency: 50/60Hz
Number of Poles: 3
Short Circuit and Protection Parameters
Maximum Short-Time Short-Circuit Current Impact (Icw, 1s): 15kA 

Rated Short-Circuit Limit (Iq):
• 100kA at AC400V
• 50kA at AC690V

Utilization Category:
• AC-23B (AC400V)
• AC-21B (AC690V)

Mechanical Characteristics
Mechanical Durability: 800 switching cycles

Dust and Water Resistance Level:
• ON State: IP20
• OFF State: IP30

Control Method: Handle

Mounting Method: Vertical Installation

Ambient Temperature: -5°C to +40°C

Operating Altitude: Up to 2000m above sea level

Pollution Degree: 3

Insulation Class: III, IV

Functions and Usage
Primary Circuit Disconnection Protection – Used in industrial electrical distribution networks for controlling and protecting equipment from overloads and short circuits.
Circuit Isolation and Emergency Disconnection – Can be used as a disconnector when power supply needs to be cut off quickly.
Automatic Overvoltage and Overload Protection – Ensures electrical supply safety and stability.
Easy Fuse Replacement – The housing allows for easy fuse replacement and maintenance.
Modular Design – Consists of a base, cover, and outputs, making it easy to install in various distribution cabinets.
Pros and Cons
Pros:
High operating current – suitable for high loads in industrial systems.
High short-circuit current limit – ensures safety in emergency cases.
Modular design – easy to install and maintain.
Additional accessories can be integrated – e.g., auxiliary contacts, signal accessories.
Protection against overvoltage, overload, and phase loss – ensures reliable operation under different conditions.

Cons:
Requires additional fuses – the disconnector does not work without proper fuses.
No built-in short-circuit protection – requires additional circuit breakers.
Installation requires a specialist – complex wiring requires professional installation.

The 3-phase fuse switch disconnector block is a high-quality industrial safety device designed for electrical distribution systems, control panels, and high-power electrical equipment. Its high current rating, reliable operation, and durable plastic housing ensure safe and efficient power management.

It is ideal for industrial, manufacturing, and electrical distribution applications where system safety and reliability are essential.