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July 22, 2014, the Czech Republic, Shanghai Electric latest news: Our company successfully developed the latest pluggable terminal LZ1FM-5.0 / 5.08. This type of terminal is a type of through-wall terminal and belongs to the series of plug-in terminal blocks . Its biggest product advantage lies in the unique rubber sleeve design, which successfully solves the problem that the terminal is exposed to dust during use. The LZ1FM-5.0/5.08 terminal is designed to maintain superior product performance in harsh environments, providing technical support for signal transmission and current delivery. In addition, the series can be used with many plugs such as LC1M, LC2M, LC3M, LC4M, LC5M, LC6M and so on.

Application scenario diagram:

One: the problem of burning black

1. The current is too large;

2. Oxidation.

So how do you judge which cause it? The method we take is to rub it with a finger. If it can be wiped off, like ash, it is a black substance that is formed by oxidation. It can be worn away with sandpaper or a sickle.

Two: the problem that causes high temperature

There are two possibilities: the loose terminal causes the contact resistance to be too large, thus overheating; the terminal is not loose, but the circuit is overheated due to some unknown reason, such as the power supply voltage is too high, or the load is shorted.

1, the voltage is too high. It can be checked from the source, the secondary voltage of the transformer - the voltage in the distribution box - the voltage of each consumer.

2, ground fault. It can also be checked from the transformer and then grounded to the distribution box. The ground should be grounded, while the normal phase should eliminate ground faults. It can be measured by insulation meter or shaker when power is off, and segmented measurement. It is only possible to measure cables, wires, circuit breakers, switches and other power supply and distribution lines in sections. If it is difficult to segment, remove weak electrical equipment. The fuse of the sensing device.

The key to grounding is that the grounding resistance is low and the contact area is large. The former can ensure that the grounding point has a low potential "zero potential" close to the earth potential, which can avoid the possibility that the thunderbolt will go back from the grounding line and break into the power supply circuit after you hit the thunder. The latter guarantees sufficient capacity to provide a fault current path, including lightning or short-circuit faults.