RGS77-690V/1000V/630A500A450A fast fuse

1RGS77-690V/1000V/630A500A450A fast fuse Product Overview:

Positive melting fast fuse RGS77 690V 800V 1000V 630A 600A 560A 550A 500A 450A 400A 350A 315A 300A 280A 250A 225A 200A 180A 160A 150A 125A 100A Zhejiang Zhengrong Electric Co., Ltd. is a manufacturer of fast melting fuses for fuses

IIRGS77-690V/1000V/630A500A450A fast fuse Product Details

Product storage temperature: -40 ℃ to 120 ℃. The relative humidity should not exceed 70% at 40 ℃, 80% at 30 ℃, and 90% below 20 ℃. Packaging storage temperature: -40 ℃ to 70 ℃. Relative humidity not exceeding 90%, no condensation.

The fuse operates under the following normal usage conditions and does not require additional modifications. When exceeding normal usage conditions, if within the allowable usage range, some parameters may need to be adjusted or consulted. If it exceeds the allowed usage conditions, please consult our company and conduct a job adaptability assessment and testing of the conditions. The recommended long-term current value should not exceed 80% of the rated current.

Parameter correction for changes in ambient air temperature: When operating below -5 ℃, the pre arc time of the low fold overload overcurrent of the fuse is slightly extended, and the rated current is slightly increased. However, unless -5 ℃ or above is not within the working range, it is generally not considered to increase the rated current of the fuse. When the fuse operates above 40 ℃, the rated current requires additional correction with a correction factor of - Kt. Note 1: The value of Kt has taken into account the impact of the fuse's rated current safety margin under normal operating conditions. Note 2: The ambient air temperature needs to last for 1-2 hours or more to have a significant impact.

Under normal working conditions, a) The fuse is installed separately in natural air without ventilation, and there are no other heating or cooling components within 1 meter except for the connecting wires. b) The connection terminal of the fuse should ensure stable and reliable electrical contact. The contact resistance should not significantly affect the operation of the fuse. c) Fuses can be installed vertically, horizontally, or diagonally. If relying on spring pressure to ensure the electrical connection of the fuse, it is advisable to choose a suitable position during installation to avoid the adverse effects of gravity and vibration on the electrical connection. Forced air cooling can increase the heat dissipation of fuses and increase the rated current of fuses. Correction factor for wind speed and rated current - Kv.

a) When installing fuses, the minimum gap between live parts of adjacent fuses should meet the insulation requirements. If necessary, insulation partitions should be installed between fuses to prevent phase to phase short circuits caused by live replacement of fuses. b) Combined with regular maintenance of electrical equipment, carry out inspection and maintenance, remove dust, and oxide layers in contact with conductive parts. c) Fuses with mechanical damage must be replaced. d) Do not replace fuses with loads unless permitted by usage requirements, such as fuse type load switches. e) During the product's lifespan, there will be no generation of environmental factors such as exhaust gas, dust, noise, etc. f) After the end of the product's lifespan, metal parts can be recycled, and non-metallic parts can be crushed and disposed of as general industrial waste, without causing secondary pollution to the environment.