Fusible Panelboards and Switchgear
Last Updated: April 1, 2025
Description
Fusible panelboards and switchgear are electrical distribution devices designed to convert incoming electrical power into several smaller circuits. They provide overload protection through the use of fuses, which contain a metallic element that melts when the current exceeds a specific amperage, thereby interrupting the circuit and preventing damage to the system .
Working Principle
Fusible panelboards and switchgear operate by using fuses to protect against overcurrent and short circuit conditions. When the current flowing through the circuit exceeds the rated capacity of the fuse, the metallic element within the fuse melts, breaking the circuit and stopping the flow of electricity. This mechanism is crucial for protecting electrical systems from damage due to overloads or faults. The use of fuses in these devices ensures that once a fault is cleared, the circuit remains open until the fuse is manually replaced, providing a clear indication of a fault condition and preventing automatic re-energization of a potentially unsafe circuit .
Applications
Fusible panelboards and switchgear are used in various applications across different industries. They are commonly employed in commercial and industrial facilities to power lighting systems or motors with small electrical loads. Additionally, they are used in critical power distribution systems, such as uninterruptible power supply (UPS) and inverter applications, to ensure that a fault in one circuit does not adversely affect other branches. Customized solutions are available for both new construction projects and for matching existing installations .
Advantages over other Panelboards and Switchgear
Fusible panelboards and switchgear offer specific advantages over non-fusible designs. The primary advantage is their ability to provide overcurrent and short circuit protection, which non-fusible switches do not offer. This makes fusible designs more suitable for systems with higher fault currents, as they can safely interrupt the circuit and prevent damage to the system .
Limitations
One limitation of fusible panelboards and switchgear is the need for manual replacement of fuses after a fault condition. This can lead to increased downtime compared to systems that use circuit breakers, which can often be reset without the need for replacement. Additionally, the initial cost of fusible systems may be higher due to the need for replacement fuses and the labor involved in replacing them .
Considerations
When considering fusible panelboards and switchgear, it is important to evaluate factors such as initial costs, operating expenses, and maintenance requirements. The initial cost may be higher due to the need for fuses and the potential for more frequent replacements compared to circuit breaker systems. Operating expenses can also be affected by the need to stock replacement fuses and the labor costs associated with replacing them. However, fusible systems can offer high durability and reliability, as they provide clear fault indication and prevent automatic re-energization of faulty circuits. It is also important to consider the accuracy of the protection provided, as fuses are designed to operate at specific current levels, ensuring precise protection for the system .
from Aggreko
100 amp Electrical Distribution. Aggreko pays strict attention to our portable power delivery systems to help meet our clients ’ stringent requirements for dependable, high-performance rental equipment. Our rental electrical distribution are precisely matched with our generator rentals. [See More]
- Main Device: Breakers; Fusible
- Panels: Single-Panel
- Style: Ground Mounted
- Maximum Current: 100.0
from Siemens Energy Sector
Up to 24 kV. Up to 25 kA. Up to 630 A. Single busbar. Type-tested. Metal-enclosed. Climate-independent. Maintenance-free. Individual panels and block versions. No gas work at site. Fast and easy to install. Rated voltage. kV. 7.2. 12. 15. 17.5. 24. Rated short-duration power-frequency withstand... [See More]
- Main Device: Breakers; Fusible
- Max. Voltage: ? to 24000.00
- Style: Rack Mounted
- Maximum Current: ? to 25000.0
from Schneider Electric
Power Distribution - Circuit Breaker Type. Ideal for service entrance equipment or downstream distribution panels in the electrical system of a large commercial or industrial facility. Space-saving module for value-added digital solutions. Combines I-Line and lighting sections in one panelboard. [See More]
- Main Device: Breakers; Fusible
- Maximum Current: 100.0 to 800.0
- Panels: Single-Panel
from SOCOMEC
FUSERBLOC are manually operated multipolar fuse combination switches. They make and break on load and provide safety isolation and protection against overcurrent for any low voltage electrical circuit. Advantages Improved safety. • Complete isolation of the fuse with double breaking per pole... [See More]
- Main Device: Fusible
- Panels: Single-Panel
- Style: Rack Mounted
- Maximum Current: 20.0 to 1250.0
from Aggreko
1200 amp Electrical Distribution. Aggreko pays strict attention to our portable power delivery systems to help meet our clients ’ stringent requirements for dependable, high-performance rental equipment. Our rental electrical distribution are precisely matched with our generator rentals. [See More]
- Main Device: Breakers; Fusible
- Panels: Single-Panel
- Style: Ground Mounted
- Maximum Current: 1200.0
from Siemens Energy Sector
Up to 36 kV. Up to 20 kA. Up to 630 A. Single busbar. Type-tested. Metal-enclosed. Climate-independent. Maintenance-free. Individual panels and block versions. No gas work at site. Fast and easy to install. Rated voltage. kV. 36. Rated short-duration power-frequency. withstand voltage. kV. 70. Rated... [See More]
- Main Device: Breakers; Fusible
- Max. Voltage: ? to 36000.00
- Style: Rack Mounted
- Maximum Current: ? to 20000.0
from SOCOMEC
FUSERBLOC fuse combination switches combined with high speed fuses (UR) provide optimal breaking and making on load, safety isolation and protection of power semiconductors (variable speed drives, inverters …). Advantages Limitation of short-circuit current. The limitation of short-circuit... [See More]
- Main Device: Fusible
- Panels: Single-Panel
- Style: Rack Mounted
- Maximum Current: 25.0 to 1250.0
from Aggreko
5 amp Electrical Distribution. Aggreko pays strict attention to our portable power delivery systems to help meet our clients ’ stringent requirements for dependable, high-performance rental equipment. Our rental electrical distribution are precisely matched with our generator rentals. [See More]
- Main Device: Breakers; Fusible
- Panels: Single-Panel
- Style: Ground Mounted
- Maximum Current: 5.0
from Siemens Energy Sector
Up to 15 kV, 31.5 kA, 2500 A busbar, 2500 A feeder. Up to 24 kV, 25 kA, 2500 A busbar, 2000 A feeder. Metal-enclosed. Single-busbar. Gas-insulated. Hermetically enclosed. Factory-assembled, type-tested switchgear. according IEC 62 271-200. Customer's Benefit: - Environmental Independence. -... [See More]
- Main Device: Breakers; Fusible
- Max. Voltage: ? to 24000.00
- Style: Rack Mounted
- Maximum Current: ? to 31500.0
from SOCOMEC
FUSERBLOC UL fusible disconnect switches are heavy duty switches that break and make power circuits on and off load. The switches employ double break contacts per pole that ensure complete isolation of the fuse when the switch is in the “OFF ” position. These switches are extremely... [See More]
- Main Device: Fusible
- Panels: Single-Panel
- Style: Rack Mounted
- Maximum Current: 30.0 to 800.0
from SOCOMEC
FUSOMAT are manually controlled tri- or tetrapolar fuse combination switches. They can be tripped remotely. They break or switch off on load and provide safety isolation and protection against overcurrent for any low voltage electrical circuit. They can automatically disconnect a circuit in... [See More]
- Main Device: Fusible
- Panels: Single-Panel
- Style: Rack Mounted
- Maximum Current: 250.0 to 1250.0
from SOCOMEC
RM and RMS are modular fuse disconnect switches for cylindrical fuses. They provide safety disconnection and protection against overloads and short-circuits in any low voltage electrical circuit. - RM: fuse disconnect switches without signalisation (for fuses without striker). - RMS: fuse disconnect... [See More]
- Main Device: Fusible
- Panels: Single-Panel
- Style: Rack Mounted
- Maximum Current: 32.0 to 50.0