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NH4
Chanan
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NH4 fuse links are a crucial component of the NH fuse system, distinguished by the "4" which indicates its position as the largest size within the NH fuse series, ranging from NH00 (the smallest) to NH4.
Key characteristics of an NH4 fuse link:
Physical Size: The "4" signifies the standardized dimensions of the fuse, enabling it to fit into corresponding fuse bases or switchgear.
Electrical Ratings: NH4 fuse links have specific voltage and current ratings, representing the maximum parameters they can handle. These ratings ensure the fuse can carry a designated current under normal conditions and interrupt the current under fault conditions.
Protection Function: NH4 fuse links are designed to safeguard electrical circuits from overcurrent, typically caused by overloads or short circuits. When an overcurrent event occurs, the fuse link's fusible element melts, opening the circuit and preventing potential damage to other components or the risk of fire.
Design: NH4 fuses typically feature a knife-blade design with contact blades at both ends, enabling easy insertion and removal from fuse bases or disconnect switches.
Applications: NH4 fuses are commonly used in industrial and commercial electrical installations that require robust overcurrent protection for high-power equipment such as large motors and transformers, owing to their large size and high capacity.
Standardization: Manufactured according to International Electrotechnical Commission (IEC) standards, NH4 fuse links ensure compatibility and safety across different manufacturers and applications worldwide.
Identification: NH4 fuse links are clearly marked with their rated current and breaking capacity, facilitating the selection of the correct fuse for specific electrical applications.
NH4 fuse links play a critical role in ensuring electrical safety in heavy-duty industrial environments, providing reliable overcurrent protection to maintain system integrity and prevent damage.
| Model | Equivalent models | Rated current (A) | Rated voltage (V) | I²t (Amps² seconds) | Power loss（W) | |
| Pre-arcing | I1 120kA at 500V | |||||
| NH4-500A | RT16-4 NT4 RT20-4 RO39 3NA3 | 500 | 500 690 | 800000 | 3850000 | 37 |
| NH4-630A | 630 | 880000 | 4100000 | 48 | ||
| NH4-800A | 800 | 1500000 | 6480000 | 68 | ||
| NH4-1000A | 1000 | 4800000 | 13000000 | 80 | ||
| NH4-1250A | 1250 | 7000000 | 18000000 | 108 | ||
NH4 fuse links are a crucial component of the NH fuse system, distinguished by the "4" which indicates its position as the largest size within the NH fuse series, ranging from NH00 (the smallest) to NH4.
Key characteristics of an NH4 fuse link:
Physical Size: The "4" signifies the standardized dimensions of the fuse, enabling it to fit into corresponding fuse bases or switchgear.
Electrical Ratings: NH4 fuse links have specific voltage and current ratings, representing the maximum parameters they can handle. These ratings ensure the fuse can carry a designated current under normal conditions and interrupt the current under fault conditions.
Protection Function: NH4 fuse links are designed to safeguard electrical circuits from overcurrent, typically caused by overloads or short circuits. When an overcurrent event occurs, the fuse link's fusible element melts, opening the circuit and preventing potential damage to other components or the risk of fire.
Design: NH4 fuses typically feature a knife-blade design with contact blades at both ends, enabling easy insertion and removal from fuse bases or disconnect switches.
Applications: NH4 fuses are commonly used in industrial and commercial electrical installations that require robust overcurrent protection for high-power equipment such as large motors and transformers, owing to their large size and high capacity.
Standardization: Manufactured according to International Electrotechnical Commission (IEC) standards, NH4 fuse links ensure compatibility and safety across different manufacturers and applications worldwide.
Identification: NH4 fuse links are clearly marked with their rated current and breaking capacity, facilitating the selection of the correct fuse for specific electrical applications.
NH4 fuse links play a critical role in ensuring electrical safety in heavy-duty industrial environments, providing reliable overcurrent protection to maintain system integrity and prevent damage.
| Model | Equivalent models | Rated current (A) | Rated voltage (V) | I²t (Amps² seconds) | Power loss（W) | |
| Pre-arcing | I1 120kA at 500V | |||||
| NH4-500A | RT16-4 NT4 RT20-4 RO39 3NA3 | 500 | 500 690 | 800000 | 3850000 | 37 |
| NH4-630A | 630 | 880000 | 4100000 | 48 | ||
| NH4-800A | 800 | 1500000 | 6480000 | 68 | ||
| NH4-1000A | 1000 | 4800000 | 13000000 | 80 | ||
| NH4-1250A | 1250 | 7000000 | 18000000 | 108 | ||
