Horizontal fuse switch disconnector holder block | 3P | 630A | 690V | for NH3 fuses

Technical Specifications
General Characteristics
Nominal operating voltage (Ue): AC 400V / AC 690V
Nominal operating current (Ie): 630A
Nominal insulation voltage (Ui): 1000V
Nominal impulse withstand voltage (Uimp): 12kV
Operating frequency: 50/60Hz
Number of poles: 3

Short-Circuit and Protection Parameters
Maximum short-circuit current withstand (Icw, 1s): 15kA
Nominal short-circuit withstand limit (Iq):
• 100kA at AC400V
• 50kA at AC690V

Usage category:
• AC-23B (AC400V)
• AC-21B (AC690V)

Mechanical Characteristics
Mechanical endurance: 800 switching cycles
Dust and water resistance level:
• In switched-on state: IP20
• In switched-off state: IP30

Control method: Handle
Mounting method: Vertical mounting
Ambient temperature: -5°C to +40°C
Operating altitude: Up to 2000m above sea level
Environmental pollution level: 3
Insulation class: III, IV

Functions and Usage
Main electrical circuit disconnection protection – used in industrial electrical distribution networks to control and protect equipment from overloads and short circuits.
Circuit insulation and emergency disconnection – can be used as a disconnecting switch for quickly cutting off the power supply.
Automatic protection against overvoltages and overloads – ensures the safety and stability of the power supply.
Easy NT-type fuse replacement – the casing allows easy fuse replacement and maintenance.
Modular construction – composed of a base, cover, and outlets, making it easy to install in various distribution cabinets.

Advantages and Disadvantages

Advantages:

High working current (up to 630A) – suitable for heavy loads in industrial systems.
High short-circuit current limit (up to 100kA) – ensures safety in emergency situations.
Modular construction – easy to install and maintain.
Additional accessories can be integrated – e.g., additional contacts, signaling accessories.
Protection against overvoltage, overloads, and phase loss – ensures reliable operation in various conditions.
Disadvantages:

Requires additional fuses – the disconnecting switch does not operate without appropriate NT-type fuses.
No built-in short-circuit protection – additional circuit breakers are needed.
Installation requires a specialist – complex connections require professional installation.
The 630A 3-phase fuse disconnect block is a high-quality industrial safety device designed for electrical distribution systems, control cabinets, and high-power electrical equipment. Its high current limit, reliable operation, and sturdy plastic casing ensure safe and efficient energy supply management.

Perfect for use in industries, manufacturing, and electrical distribution sectors where system safety and reliability are crucial.