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The fairness of the original designers and manufacturers, these ACBs are well designed and very well made – so much so that many people consider working perfectly since decades. The expected long-term use, they are often used in critical, continuous operation of facilities such as data centers. However, do not overload or replacing older generation STR protection unit often proved to be problematic, because most of the original manufacturer no longer offers support. Instead, it usually recommends simply replaces the old ACB current production model. This may be more expensive tools necessary, and often much more, requiring considerable downtime of the switch must be replaced, and the circuit breaker.
nuisance tripping, by definition, a false alarm, fault protection unit STR, does not indicate the real problem. Unfortunately, indicating that this protection unit, not the system as a whole, that is to blame, is not easy, especially, we are all trained to assume the worst – that is a major, major problem. Repeated power cuts still a serious problem on their own, which caused many operators to look for larger units in the previous solution, rather than wait for the older units to start “playing up”.
Fortunately, thanks to prevent accidental release is also much easier and less costly for the development of a unique product updates known manufacturers.These allow the old ACBs must be updated with sophisticated electronic control, which allows the other unit continues to reliably work.
Most of the electric circuit breaker is still in use already in arrears older generation solid-state trip unit, but many users are choosing to upgrade these breakers of the art equipment, such as PS Electric’s Amp fuses Pro because it provides a measurement and to improve the selectivity and many features not available in smaller units. The key is to substantially increase the safety of the operator with features such as all the original road parallel to the curve, “Quick Trip” ARC FLASH reduction system, OLED display shows data for the last eight trip events and GUI uploading settings and downloading travel data to USB.
Typical update includes an electronic trip unit display module, electricity, automatic reset actuators, wiring, brackets and / or copper shunts. The remote-mounted display can be installed outside the switch, so the workers do not have to “suit up” view of the load, settings, and travel history. The backlight function displays accurate three-phase power meter, displaying current ground faults in real time. Non-controllers, redundant displays or batteries inside the cabinet. This eliminates the majority of cases where workers would open the door to break-in circuit breaker.
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Source by Michael R Taite