Principle Of Current Quick-break Protection For Cable Waterproof Connector

What is Nylon Cable Gland current quick-break protection? In fact, we can know from the literal meaning that it refers to the current protection function of instantaneous action when the current of the cable waterproof connector changes or exceeds the preset protection setting range. When the short-circuit current amplitude in the line increases, it can produce instantaneous action, thereby achieving the purpose of current protection.

However, in order to ensure the selectivity of its microcomputer protection device, it can usually only protect a small part of the line. If the current quick-break protection is installed on the line every day, then when a certain section of the line fails, people hope that it has an instantaneous action protection function, and its protection range can reach 100% of the line length as much as possible, but whether it can be achieved still needs to be analyzed according to the specific situation.

In order to solve this problem, there are generally two methods, both of which will give priority to ensuring the selectivity of the action, that is, from the integrity of the protection device startup parameters to determine that the next section of the line will not start when the outlet is short-circuited.

Another way is that in some cases, if the rapid removal of the fault is the first choice, it is necessary to use automatic reclosing to adjust this non-selective action.

When a fault occurs in the line, because the short-circuit current is relatively large, according to the relay principle, if the short-circuit current can be set to the relay action current through scientific calculation, the purpose of protection can be achieved.

However, the cable waterproof connector current quick-break protection cannot protect an entire line, and can only select one end of the line for protection, so it also needs to be coordinated with the unlimited current quick-break.