1) switch normal power supply and emergency backup generator power can disconnect between the need to use a four-pole neutral switch, and the two can not be connected in parallel. 2) there is danger of a gas explosion in Zone 1 and Zone 10 dust explosion hazard place Guangzhou distribution room, swimming pool, baths and other humid places have to be provided for the neutral and phase conductors together with disconnected electrical isolation. 3) In order to maintain the maintenance, protection of personal safety, be fitted with electrical isolation to endanger the safety of neutral potential isolation. In summary, we have a variety of problems in the design of substation, to be improved in the future. My simple analysis and spotting views for reference only. Inappropriate, please correct me. Equipment arrangement in arrangement of substation equipment, we also present problems, even in violation of the provisions of the mandatory provisions, is an example only as follows: 1) The high and low voltage distribution system map and plan inconsistent. Its manifestations are two types: one is a system diagram of a plan view of the cabinet, the opposite order of the screen. When look at the system diagram is for cabinet, the front panel, which is arranged from left to right 1,2,3 ...... n; and in the plan is for the back panel, which is arranged from left to right 1, 2,, 3 ...... n, inevitably backwards. The key is to avoid errors in the system and plan for the cabinet should be front screen arranged in the order from left to right. Second, there is a plan bus bridge between the double-face arrangement of distribution panel, but has not been shown in the system of FIG. 2) low-voltage distribution screen in the front, rear screen channel width does not meet the new regulatory requirements. After the screen sometimes Jinju wall as 700mm, 1800mm drawer are only a low voltage panel double-face arrangement according to specifications GB50053-94 section 4.2.9 provides high and low voltage power distribution room, indoor low-voltage distribution power panel arranged in a row front screen, after passage of the minimum width of the screen: the screen after its passage Shandong power distribution room, fixed and drawer are 1000mm; its screen before passage, fixed single-row arrangement of 1500mm, arranged in a single row drawer 1800mm, Fixed double face arranged to 2000mm, double drawer face arranged 2300mm. Only when the building wall in case when the column type local projections protruding portion channel width can be reduced 200mm. High and low voltage power distribution room, power distribution room, Teflon electricity provided by the Power Engineering Co., Ltd. Nanyang Teflon. Nanyang Fu Long Electric Power Engineering Co., Ltd. (www.nyfulong.com) strong, credible, Nanyang in Henan transmission equipment and materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Teflon electricity into the brilliant and you work for a better future!