Nanyang Nanyang distribution room installation _ Teflon distribution room service selected power distribution room _ Nanyang

 13 distribution room design requirements, low voltage power distribution room, high voltage power distribution room dry-type transformers, vacuum breaker breaker or unfired medium and low voltage dry-type capacitor Nanyang distribution room room service, not less than three. Roof load-bearing components should be two. 14, low voltage power distribution room, oil-free high-voltage power distribution room, dry-type transformer room and control room duty room doors, fire doors should not be less than the standard B's. 15, the door should be fitted between the substation of the room to open the door for two-way or open to the low pressure side. 16, with a substation doors open to the outside, the windows are to be provided with anti-rain, snow and other small animals into the room and facilities. 17, transformers and distribution equipment room door width and height, should be added to the external dimensions of the largest piece of transport 0.3 m. 18, with each room on the ground substation should adopt high-grade cement plaster calendering or terrazzo floor construction Nanyang distribution room, transformer room and capacitors room ventilation requirements and raise the floor of the program should be used, the transformer room on the ground should be located There are ventilation hole in the middle of a 2% slope gradient. 19. The distribution between the door should open outwards, not less than the standard B's fire doors. Distribution between the walls should be not less than the fire resistance of non-burning body 1h. 20, indoor cable trench cover and interior floor to be flat, easy water fouling in place, it is appropriate to cover the asphalt cement mortar or plaster die. 21, cable channel waterproof measures should be taken. The bottom should be done no less than 0.5% of the vertical drainage slope and set sump (well), water discharge Nanyang distribution room tool cabinet, conditions can be directly discharged into the sewer district, with the absence of such conditions, Nanyang electrical room, then discharged through the sump pump. 22, cable laying on the multilayer stent is located at the bottom of the high-voltage cables, low voltage cable on the top layer. 23, laying cables in the trench, the length of the stent should not be greater than 350mm. 24. See substation 10kV and below design specifications GB50053-94. Recommended use D, yn11 tie line transformer recent years, the use of D in TN systems, yn11 tie line group of the transformer is very common, but there are not small projects still use Y, ynO tie line group of transformers, the main reason is not clear advantage of the former. In GB50052-95 "supply and distribution system design" in Article 6.0.7 states: "In the low-voltage grid TN and TT earthing system type, and should use D, yn11 tie line group as a three-phase transformer distribution transformers . " Here, "should use" grounds, mainly based on D, yn11 tie line than Y, ynO tie line transformer has the following advantages: 1) in favor of the higher harmonic current suppression. And more than three times higher harmonic excitation current in the primary access into △ shape conditions, can be formed in the primary circulation, help suppress harmonic current, ensure the quality of the supply waveform. 2) in favor of the unit ground fault fault removal. Because D, yn11 tie line than Y, zero sequence impedance ynO tie line is much smaller transformer single phase power distribution system to expand more than three times the short-circuit current, it is beneficial to the single-phase short-circuit fault of resection. 3) the ability to take full advantage of the device of the transformer. Y, ynO tie line neutral current transformers require no more than 25% of the rated current of the low voltage winding (see Section 6.0.8 GB50052-95 article), severely limiting the contact with the single-phase load capacity, affect the ability of the transformer device fully utilized; and D, the neutral current transformer yn11 junction line phase current is allowed to reach more than 75%, even up to 100% of the phase current, so that the capacity of the transformer can be fully utilized, which is a large single-phase load capacity system is very necessary. Therefore, low-voltage grid type TN and TT earthing system, the recommended D, yn11 tie line group of distribution transformers. Nanyang Nanyang distribution room installation _ Teflon distribution room service selected power distribution room _ provided by Nanyang Nanyang Fulong Power Engineering Company Limited. Nanyang Fulong Power Engineering Co., Ltd. (www.nyfulong.com) is Nanyang, Henan, transmission equipment and materials leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Teflon leader in power with the staff warmly welcome all inquiries negotiations to create Teflon power a better future.