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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3NA3254 |
| Manufacturer | Siemens |
| Product Type | HRC Fuse Element |
| Rated Current | 355 A |
| Power Loss | 26 W |
| Mounting Position | Vertical, Any |
| Size of Fuse System | NH2 according to DIN EN 60269-1 |
| Operating Class of Fuse Link | gG |
| Type of Voltage | AC/DC |
| Supply Voltage (AC) | 500 V |
| Supply Voltage (DC) | 440 V |
| Protection Class | IP20 with connected conductors |
| Switching Capacity Current | 120 kA according to IEC 60947-2 |
| Dissipation Power Loss | 26 W for rated value of the current at AC in hot operating state per pole |
| Operational Current | 355 A at AC |
| Mechanical Design Width | 57.8 mm |
| Mounting Position | Any, preferably vertical |
| Net Weight | 654 g |
| Ambient Temperature (Operation) | Minimum -5 °C, Maximum 40 °C |
| Ambient Temperature (Storage) | -20 to +50 °C at 95% relative humidity |
| Environmental Conditions | Air humidity 90% at 20 °C |
| Certificates and Approvals | General Product Approval, Declaration of Conformity, Test Certificates, Special Test Certificate |
The Siemens 3NA3254 is a high-quality HRC (High Rupturing Capacity) fuse element designed to provide reliable overcurrent protection in industrial settings. This component is part of the SENTRON product family, known for its robustness and efficiency in safeguarding electrical circuits.
With a nominal current rating of 355 A, the 3NA3254 is capable of handling significant electrical loads, making it suitable for a wide range of applications. The fuse operates effectively within a supply voltage range of up to 500 V AC and 440 V DC, ensuring versatility across different power systems.
The fuse link features a gG operating class, which indicates it is designed for general application and is capable of providing both short-circuit and overload protection. This characteristic makes it an excellent choice for protecting cables and power lines, as it can interrupt fault currents up to 120 kA according to IEC 60947-2 standards.
The 3NA3254 is engineered with blade contacts and front indicators for ease of use and quick identification of fuse status. Its non-corroding, silver-plated switching contacts are built to maintain integrity over time, ensuring long-lasting performance.
With a power loss rating of 26 W, the fuse operates efficiently, minimising energy waste and heat generation. The mechanical design allows for flexible installation, with the ability to mount the fuse in any position, though a vertical orientation is preferred for optimal performance.
The compact dimensions of 70.5 x 57 x 147.6 mm and a net weight of 654 g make this fuse element a practical choice for space-constrained environments. Its IP20 protection class with connected conductors ensures that the fuse is safeguarded against the ingress of solid objects, adding to its durability and reliability in industrial applications.
Overall, the Siemens 3NA3254 HRC fuse element is a dependable and efficient solution for protecting electrical equipment from overcurrents, ensuring the safety and continuity of electrical systems in commercial and industrial facilities.
Commonly Asked Questions
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Frequently Asked Questions
What is the operating class of this fuse link?
The fuse link operates under the gG class, which is suitable for general applications, providing protection for both cables and equipment.
Can this fuse link be used with both AC and DC voltages?
Yes, it is designed to be used with both AC and DC voltages, with a rated value of 500 V for AC and 440 V for DC.
What are the environmental operating conditions for this fuse link?
The fuse link can operate within an ambient temperature range of -5 °C to 40 °C and can handle up to 90% air humidity at 20 °C.
What is the switching capacity of this fuse link?
It has a switching capacity current of 25 kA at DC according to IEC 60947-2 and 120 kA according to IEC 60947-2 for AC.
What is the power loss associated with this fuse link?
The power loss is rated at 26 W per pole in a hot operating state when used at the rated current value.
What is the recommended mounting position for this fuse link?
While it can be mounted in any position, it is preferably mounted vertically to ensure optimal performance.
What is the size and weight of this fuse link?
The enclosure width is 57.8 mm, and the net weight of the fuse link is 654 g.
What type of protection class does this fuse link have?
It is classified under protection class IP20 when connected to conductors.
How does the operational current vary with temperature?
The operational current rating decreases as the ambient temperature increases, with specific values provided for temperatures ranging from 30 °C to 60 °C.
Does this fuse link come with any indicators?
Yes, it includes front indicators that provide a visual indication of the fuse status.
Part conditions explained
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