15KB12 Datasheet/PDF15KB12 is a standard type of intelligent fire-protection fuse, specially developed for high-end protection from strong current in special industrial applications, with excellent temperature resistance, and commonly used in audio-visual, telecommunication, construction site, power transforming and distributing areas.
The dimension of the 15KB12 fuse is the same as 5x20mm glass tube fuses, mainly made out with material like porcelain, aluminum alloy, silver alloy, nickel platinum etc., with a visual indicator to indicate the Fuse circuit and current status. The maximum power dissipation can reach up to 4000A.
The visual indicator is a mechanical transmission device activated by the temperature of the fuse body. In the case of over current, the temperature of the fuse body raises rapidly to a certain preset level and then activates the visual indicator and it gradually changes color from blue to red, indicating that fuse has been activated and there is a current overload. This feature helps to keep the system and personnel safety, and also simplifies the circuit and current fault maintenance.
The working principle of 15KB12 fuse relies on a small temperature difference between two states. That is, when there is normal current, 15KB12 fuse has a temperature of 30°C~60°C. When the current is increased, due to the lag effect between device warm-up speed and current speed, the fuse temperature rises quickly to a certain preset temperature then activates the transmission device and the indicator color changes.
Though the 15KB12 fuse provides effective protection from strong current, its over-current protection is not instantaneous. In order to reduce damages caused by excessive current flow, it is important to consider and evaluate the time-delay of the fuse according to the requirement of the application. This is because the speed of current rising will influence the time-delay of the fuse, and the long-term protection plays a vitally important role in the system and personnel safety.
In a nutshell, the 15KB12 fuse is an ideal choice for protecting the system from over-current when dealing with powerful current in industrial applications. With its accurate temperature control, excellent temperature resistance and visual indicator, the 15KB12 fuse not only offers efficient protection of the device, but also increases the safety of system and personnel.