subject: Of Europe And The United States Cable Distribution Boxes Difference [print this page] Click to see more exciting information Click to see more exciting information
China High pressure Cable distribution boxes in the patch device currently used, divided into two major European and American series. 20th century European-style device is imported from Europe and 80 outdoor box Transformer substation Cable to connect the concept of a reference to the cable distribution boxes in the field, the American device sucked from the U.S. introduction of 90 seat-mounted box Transformer substation The concept of reference into the cable plug to the cable distribution box.
1 European components and devices of different points of American
European and American devices have no clearly defined boundaries, our understanding of the industry are also inconsistent. They are slightly different performance and price, find out the difference between the work of the selection is quite significant.
1.1 devices with different insulation
American conductor devices out there surrounded by three layers of rubber, the most inner semi-conductor shielding layer, middle layer-based insulation layers, the outermost permanent ground for the semi-conductor shielding layer, so that shielded the price slightly high. European-style two-story device appearance of bread wrapped in rubber, not the most external stratum.
1.2 branch circuit to connect the concept of different
European device serial branch mode, about a number of silicone rubber insulated T-type device from the direction of the short arm of one by one, connected in series to form the main loop, each T piece from the long arm of the branch leads to. This approach has some shortcomings in series branch: If a branch road from the T piece fails, then the series components must be removed, the removal of defective parts to re-group T-series can continue after the run ended when troubleshooting, component also need to try again and re-splitting, more trouble; more than the first series with the main circuit, affecting the reliability of electrical conductivity and reduce dynamic stability; when larger series with components, the axis is difficult to maintain a straight line, leading to some of the bonding interface deviate from the normal position, the interface of dielectric strength and ability will reduce water seepage.
The American branch of device was used in parallel mode, just to overcome the series branch of the faults. Parallel branch is in the distribution boxes of the box walls fixed a (three-phase) is called the parent row of the insulation board devices, which play the role of convergence bus. Mother board has a number of row Electric Outside the cone on the parallel connection seat, regardless of inlet and outlet, branch lines and other cables all connected to the bus bar plate. Busbar internal conductor is silver plate welding, conductive reliable, but bigger difference between three-phase, phase jumper cable slightly more difficult, and the three-phase bus bar plate lined up the length of the box size will become larger.
1.3 with the surface of the cone taper different
European tie by German standards DIN47636 taper design, smaller taper; American with the taper is designed according to American Standard IEEE386, taper slightly. With different taper, will bring the following two ways:
A) The interface between devices of different dielectric strength along the surface. Insulation strength of bonding interface with the exponential increase in pressure rebound relationships, high flexible silicone rubber, the weight of the more compact the higher dielectric strength. Those with the big rebound taper on the large dielectric strength to be higher, so the interface insulation strength of American Continental's bigger than that.
B) different watertight. Taper with the larger, the more closely the weight of the interface of rubber materials, seepage water, the better the performance. Therefore, the water seepage American device performance is slightly better than the European-style device.
4 European and American devices device principle of distinction
Domestic production patch devices, some factories will be in Europe, the United States and the two type of structures, mixed, more difficult to distinguish. The following three basic concepts will help us determine:
A) the device from the patch branch structure, the parallel is the American branch, the branch of a European series.
Of Europe And The United States Cable Distribution Boxes Difference
