GST001 MV/LV TRANSFORMERS LOCAL SECTION CELG D

Transcription

1 GST001 MV/LV TRANSFORMERS LOCAL SECTION CELG D In addition on what specified in the common part, the following requirements are prescribed: 3.1 LAWS Portaria INMETRO 378/2010 Requisitos de Avaliação da Conformidade para Transformadores de Distribuição em Líquido Isolante. Portaria Interministerial 104/2013 Regulamentação Específica de Transformadores de Distribuição em Líquido Isolante do Ministério de Minas e Energia. 3.3 LOCAL STANDARDS ABNT NBR 5440 E-MT-022 Transformadores para redes aéreas de distribuição - Requisitos. Especificación Técnica de Transformadores de Distribución: Fórmulas para Evaluación Económica INSTALLATION Mouting System Company Single-Pole Double-Pole Surface Level CELG 300 Not used Not used Table 1 Mounting System 5.12 LOSSES, SHORT CIRCUIT IMPEDANCES AND SOUND POWER LEVELS The losses shall be in compliance with E-MT TANK The active part, which is mounted to the tank walls, should have devices (hooks, holes, or others) that facilitate its removal and placement. These devices should be symmetrical and guarantee lifting without horizontal movement; and they should be different from the tank fastening supports. 6.4 INSULATING LIQUID AND MATERIAL The oil should have the following characteristics: GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 1

2 CHARACTERISTICS UNIT Appearance - VALUES Minimum Maximum The oil should be clear, free of suspended matter or sediment. Density 20/4 C - 0,861 (N) - 0,900 (N) 0,860 (P) Kinematic viscosity: 20 C - 25,0 (2) 40 C mm 2 /s - 11,0 (N) 12 (P) 100 C - 3,0 Fire point C 140,0 - Pour point C - -39,0 Neutralization index mg KOH/g - 0,03 Interfacial tension 25 C mn/m 40,0 - Color ASTM - - 1,0 Teor de água mg/kg - 25,0 Chlorides - Absent Sulfates - Absent Corrosive sulfur - Absent Dielectric strength kv 30,0 - Dielectric Loss Factor 100 C - 0,60 or % Dissipation Factor 90 C (3) - 0,50 Oxidation stability: - Neutralization index mg KOH/g - 0,40 -Borra % mass - 0,10 - Dissipation Factor 90 C (4) % - 20,0 Oxidation inhibitor content DBPC/DBP % mass 0,27 0,33 Percentage of carbons % To write Polychlorinated biphenyls (PCB) mg/kg Not detectable Total particle count / 10 ml (15000 / 100 ml) DBDS Content (dibenzyl -disulfide) mg/ml Not detectable (N) Naphthenic (P) Paraffinic Table 2 Insulating Liquid SOLID INSULATING MATERIAL The solid insulating material, of heat stable paper (equal or higher than Class E 120º C) will be required. GASKETS Seal materials of transformers should be nitrite rubber or higher, in accordance with ASTM D297, ASTM D2240 and ASTM D471. WEIGHT The maximum weights to transformers admitted are: Rated power 150 kva: 750 kg Rated power > 150 kva: 1200 kg GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 2

3 6.5 BUSHINGS The LV bushing must be located with Figure 4 and 5. The bushings should have the following characteristics: Rated Power (kva) Maximum Low Voltage (V) 380 Bushing Bushing Type 1,3/160 1,3/160 T1 75 1,3/400 1,3/160 T1 112,5 1,3/400 1,3/400 T ,3/800 1,3/400 T ,3/800 1,3/800 T3 Table 3 Bushings Type The bushings for single-phase transformers should be T1 1,3/160 A. The bushings should have the characteristics of Figure 10 and 11. Phase Markings and Identification The sequence for each phase of the distribution transformer should be marked. The identification should be engraved in high relief or bas-relief. During the draft approval stage, details for the required markings and identification will be indicated. 6.6 DE-ENERGIZED TAP-CHANGER The DETC will be located on the tank side and at the low voltage side installed to ensure tightness. The lid switch must be fixed to the tank in order to be unmissable SUPPORTING The mounting support for single-pole mounted transformer is also detailed in table below. Company Positon of the bracket Rated Power CELG Fixing bracket in the LV side All power values Table 4 Position of the Bracket GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 3

4 6.9 PAINTING The color is Munsell N ACCESSORIES Each transformer shall be provided with the accessories as indicate: Accessory Rated Power 300 kva Lifting and blocking devices X Oil drain and sampling plug or valve - Thermometer pocket - Over pressure valve X Oil level indicator - Supports for surge arresters X Earthing terminals X Rating plate X Table 5 Accessories LIFTING AND BLOCKING DEVICES Transformer shall be provided with Two hooks located in the top part of the tank. The hooks will allow fastening the suspension of the transformer, in such way as not to damage the bushing insulators of the terminals and accessories and ensure the suspension of the transformer in a horizontal position. Hook Lifting of the Active Part Two eyebolts or hooks designated for machine detanking shall be located on the structure of the active part. The eyebolts will allow fastening in such a way so as not to damage the bushing insulators of the terminals and ensure detanking with the cover in a horizontal position OIL LEVEL INDICATOR Internal marking paint in the tank SUPPORT FOR SURGE ARRESTER The transformer must be provided of a support (one each phase) for the installation of medium voltage arresters. The structures may be welded to the tank. The surge arresters are not considered in the supply EARTHING TERMINALS The transformers shall have a grounding connector, detailed in Figure below. GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 4

5 Figure 1 Grounding Connector RATING PLATES AND PLATE-HOLDERS The nameplate language shall be in Portuguese. Additional to data requested in IEC standard must be added: - Level noise; - Losses; - Winding material; - Serial number; - Purchase order number; - Date of manufacture (Day, Month, Year). The rating plates should have the following characteristics: GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 5

6 Figure 2 Rating Plates Single-phase Transformer GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 6

7 Figure 3 Rating Plates Three-phase Transformer CRITERIA FOR TYPE AND SPECIAL TESTS Type tests The selection of samples for type tests shall be two units by type of transformer. The rated power will be on agreement with the Distribution Company. Special Test Short-circuit test. The sample shall be one unit by type of transformer. The rated power will be on agreement with the Distribution Company SPECIAL TESTS Test for support fixed to tank (ABNT NBR 5440). 10 TRANSPORT AND PACKING The equipment should be individually packed onto treated wood or plastic pallets in a way suitable for transport, in such a way as to avoid any damage to equipment. The packing should be suitable for GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 7

8 introducing equipment into standard transport industry containers. All additional elements of the equipment should be packed into a single crate. Transformers should be transported with their complete oil load and accessories in place. The transformer should be completely secured in its packaging. Wood should be treated according to international plague control requirements, avoiding compounds dangerous to human health or the environment, such as pentachlorophenol and creosote. The treatment should consider at least: high toxicity to xylophagous organisms, high penetrability and staying power, chemical stability, and substances which are non-corrosive to metals and which do not affect the physical characteristics of wood. A visual inspection of the equipment will be carried out upon receiving it, checking for possible damage occurred during transport and the warehousing process. 12 FIGURES Figure 4 Single-phase Transformer GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 8

9 Figure 5 Three-phase Transformer GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 9

10 Figure 6 Supporting Single-phase Transformer Figure 7 Supporting Three-phase Transformer Figure 8 Reinforcement for Three-phase Transformer With P 225 kva GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 10

11 Figure 9 MV Bushings GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 11

12 Figure 10 LV Bushings (T1) GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 12

13 Figure 11 LV Bushings (T2 and T3) GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 13

14 COMMON LIST GS Type Code Distribution Company and Country Country Code Rated Power (kva) Rated MV (kv) Volt. Reg. (steps number x step%) GO - Brazil ,97-3x4,35% GO - Brazil ,97-3x4,35% GO - Brazil ,5 7,97-3x4,35% GO - Brazil ,97-3x4,35% GO - Brazil ,97-3x4,35% GO - Brazil ,5 19,97-3x4,35% GO - Brazil ,8-3x4,35% GO - Brazil ,8-3x4,35% GO - Brazil ,5 13,8-3x4,35% GO - Brazil ,8-3x4,35% GO - Brazil ,8-3x4,35% GO - Brazil ,5-3x4,35% GO - Brazil ,5-3x4,35% GO - Brazil ,5 34,5-3x4,35% GO - Brazil ,5-3x4,35% GO - Brazil ,5 34,5 GO - Brazil ,5 13,8 +2X2,5% -1X2,5% +2X2,5% -1x2,5% Rate d LV (kv) 440/ 440/ 440/ 440/ 440/ 440/ MV insulation level Um/LI/AC (kv) F (Hz) N. of phases 1P, 2P, 3P Connection Symbol Zsc (%) MV bushing type MV Minimum creepage distance (mm) LV bushing type Losses classes or max values 15/95/ P 2,5 Sol Sol. 8 Value Load Loss (W) No Load Loss (W) Noise level Sound Power (db) Wheels (Yes/No) Overall dimensions HxLxW (mm) No 1200x800x x800x 15/95/ P 2,5 Sol Sol No Value x800x 15/95/ P 2,5 Sol Sol No Value x800x 36/150/ P 3,0 Sol Sol No Value x800x 36/150/ P 3,0 Sol Sol No Value x800x 36/150/ P 3,0 Sol Sol No Value x /95/ P Dyn1 3,5 Sol Sol No Value x x /95/ P Dyn1 3,5 Sol Sol No 1300x /95/ P Dyn1 3,5 Sol Sol No 1300x /95/ P Dyn1 3,5 Sol Sol No 1800x /95/ P Dyn1 4,5 Sol Sol No Value x x /150/ P Dyn1 4,0 Sol Sol No 1600x /150/ P Dyn1 4,0 Sol Sol No 1600x /150/ P Dyn1 4,0 Sol Sol No 1600x /150/ P Dyn1 4,0 Sol Sol No 1600x /150/ P Dyn1 4,0 Sol Sol No 1300x /95/ P Dyn1 3,5 Sol Sol No Painting Brackets for pole (Yes/No) Brackets for arrester (Yes/No ) GST001 - Local Section CELG D Normatização Técnica e Desenhos de Rede 14