Vertical fuse switch disconnector holder block | 3P | 250A | 690V | for NH1 fuses | for panel mounting

Technical Specifications:
Electrical parameters (with fuse connection):
Rated operating voltage (Ue): AC400V / AC500V / AC690V
Rated operating current (Ie): 250A (AC400V), 250A (AC500V), 200A (AC690V)
Thermal continuous current (Ith): 250A (AC400V), 250A (AC500V), 200A (AC690V)
Utilization category: AC-23B, AC-22B, AC-21B
Limited short-circuit current (Iq): 100kA (AC400V), 100kA (AC500V), 50kA (AC690V)
Insulation voltage (Ui): 1000V
Impulse withstand voltage (Uimp): 12 kV
Frequency: 50/60 Hz
Electrical durability: 200 cycles
Electrical parameters (with copper connection):

Rated operating voltage (Ue): AC500V
Rated operating current (Ie): 250A
Thermal continuous current (Ith): 250A
Utilization category: AC-23B
Limited short-circuit current (Icw): 12kA
Insulation voltage (Ui): 1000V
Impulse withstand voltage (Uimp): 12 kV
Frequency: 50/60 Hz
Electrical durability: 200 cycles
Mechanical data:
Mechanical durability: 1400 cycles
Copper busbar distance: 185 mm
Protection degree: IP20 (open state), IP30 (closed state)
Operating temperature: -5°C to +55°C
Operating mode: Continuous operation
Control: Handle
Mounting type: Vertical
Operating altitude above sea level: ≤2000 m
Pollution degree: 3
Overvoltage category: III
Fuse data (RT16NTNH – GB/T13539.2, IEC 60269-2):
Operating current (In): 250A (AC400V), 250A (AC500V), 200A (AC690V)
Power loss (P): 18W (AC400V), 23W (AC500V), 32W (AC690V)
Additional features:
Electronic fuse monitoring system (EFM) – optional installation.
Micro switch for open/close signal outputs – can be integrated.
Applications:

Industrial electrical distribution systems
Electrical panels and substation equipment
Overload and short-circuit protection
Fuse load disconnectors for high-power electrical equipment
Energy, manufacturing, and industrial facilities requiring reliable current disconnection
Pros:

High short-circuit current limit – ensures a high level of protection.
Powerful current disconnection – suitable for high-load systems.
Integrated EFM module – allows electronic fuse condition monitoring.
Compact vertical mounting – saves space in electrical panels.
High insulation level and impulse voltage resistance.
Good mechanical resistance – ensures long service life.

Cons:

Requires an additional fuse – no built-in fuse, must be purchased separately.
Only supports vertical installation – may be inconvenient in some panel configurations.
Proper connection tightening is necessary – to avoid poor contact.

The vertical fuse disconnector holder is a high-quality electrical switch designed for reliable electrical network protection against overloads and short circuits. This device is particularly suitable for industrial power distribution systems where high current disconnection capacity and reliable protection are required. With additional accessories such as electronic fuse monitoring (EFM) or signal micro switches, this model can be effectively adapted for various electrical installations.