Студента группы Пд 212 (4) Досжанова Алина г. Алматы
жүктеу/скачать 239,65 Kb.
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Портфолио
- Бұл бет үшін навигация:
- Lightning protection
- Final indicators
| Electrical safety
Grounding is performed by the PE protective conductor. Ground bus PE, TN-S system (according to IEC). Connect all process equipment housings and floodlight masts to the ground loop using 4x30 mm galvanized strip steel. The system resistance does not exceed 4 ohms. All floodlight housings are grounded. Lightning protection Lightning protection zone: at +8.0 m. Rx = 1.5 (H-Hx/.92) = 7.2 m. At ground level, Ro = 1.5 (H) = 20.3 m. As earthing switches, 3-meter galvanized electrodes are used every 3 meters. Final indicators Power supply category-III category. Py = 22.5 kW. Pp = 22.5 kW. Annual electricity consumption – 100,000 kWh 12. External electric lighting of individual sections of the railway siding 441 km The voltage of the outdoor lighting network is 220 V. Electric lighting is provided from the designed 10/0. 4 kV transformer substations, which are located: one with a capacity of 100 kVA near the office and parking lot of the shunting locomotive; the other with a capacity of 40 kVA near the building of the SCB; and also from the existing 0.4 kV overhead line on the PK2 – PK3 section. Outdoor lighting networks are provided by cable. The cable is laid in a trench. RKU 49 outdoor lighting fixtures with high-pressure mercury DRL lamps with a power of 250 W. Outdoor lighting is controlled by circuit breakers from transformer substations and according to the existing scheme on the section PK2-PK3. The cable line of outdoor lighting is made by an ABVG cable with a cross-sectionof 3x6 mm2. The cable is laid in a trench at a depth of 0.7 m from the planning mark of the ground and is protected from mechanical damage along the entire route with a brick. From the cable box of the support to the lamp, lay an APV wire with a cross section of 3 (1x2. 5 mm2). The supports are all-metal made of pipe Ø 80 mm. жүктеу/скачать 239,65 Kb. Достарыңызбен бөлісу:
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