Application for Electricity Supply - Corenet

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Appendix 14 Substation Layout Requirements To Be Incorporated In The Architectural PlansSubstation Layout Requirements To Be Incorporated In The Architectural PlansItemCable Entry DuctsRequirementsHeavy duty 150mm dia. UPVC pipes in concrete jacket to be provided.To be sealed with removable water-tight plugs at both ends of pipes.To have piling, if necessary.Cable Entry RampCross Sectional views to be shown.150mm wide removable hot-dipped galvanised mild steel gratings to beprovided.Walls and floors to be plastered and rendered waterproof.Cable TrenchesSand filling to be carried out after cable installation.Depth of 900mm (no beams shall be allowed within/across the trenches).Openings to be covered by removable hot-dipped galvanised mild steel.Switchgear FloorGrating of 300mm width which is able to support at least 100 kg.To take a load of 1,600 kg per sq m. Floor beam is to be 200mm awayfrom the HV floor opening. All floor openings to be free of beam.SwitchroomLouvred heavy duty aluminium door to Grid drawing C/01/75E.Size: 2.9M X 1.8M wide nett for 22kV switchroom 2.7M X 1.8M wide nettfor 6.6kV switchroom,Floor to have a 50mm thick cement rendering including a 20mmgranolithic smooth finish of cement, granite chips and sand in the ratio of1:1:1 plus 9kg ironite or equivalent approved hardener to each 45 kg ofcement. For 22kV substations, final rendering of Grid switchroom floor tobe done after installation of switchgear floor frame.Height: No part from floor to ceiling beams to be less than 3.1M. Nocolumn allowed within the switchroom.Hot-dipped galvanised mild steel/stainless steel railing to be provided forstairs and loading platform. (Removable type in front of door.)Hasp and staple (140m x 65m x 6mm) and door hinges to be of brass ofstainless steel.Adequate natural lighting required. Provision of glass block in smallmodules.Ventilation panels at high level for all 6.6kV substation and ONLY 22kVsubstation integrated into customer's building.
Transformer Room/YardNoise level of 60 dB emitted from each transformer to be considered inthe choice of location of transformer yard.Adequate natural cross air ventilation required. Provision of PC vent blockor Aluminium ventilation panels.Each transformer plinth to be able to take a dead load of 6 tonnes. For22/6.6kV transformer, plinth to be able to take a dead load of 30 tonnes.For transformer yard, 50 - 75 mm size granite chips are to be providedafter completion of installation work.Door: 2.7M x 2.7M nett for each transformer. Heavy duty aluminiumlouvered doors to Grid drawing C/01/75E.LT trench of 800mm min. width for every 2 transformers. Separate LTtrench to be provided for additional transformers.Hasp and staple (140mm x 65mm x 6mm) and door hinges to be of brassor stainless steel.Wall/Column finishedElectrical InstallationAll concrete surfaces shall be properly prepared and 20mm cementplastering work carried out such that there should be no cracks, blistersand other defects.The emulsion painting system used for external walls shall be suitable foroutdoor application. There shall be a five (5) years warranty of thetextured coating on all walls against all defects arising from colourfastness,faulty workmanship and/or materials, etc.Schematic layout to be shownAll wiring to be in surface conduits.Circuits to be controlled by miniature circuit breakers and ELCB.Isolators for battery chargers to tap supply by-passing ELCB.Substation to be adequately lit. Light fittings are to be installed at 3M(suspension in type) and 2.4M (wall-mounting type) from floor level. Wiremeshcasing to be provided for light fittings installed in cable chamber. Tolabel circuits at DB (distribution board) corresponding to the respectiveswitches, sockets and isolators, etc.Cable Chamber'Basement' (whererequired)Trap door floor openings 760mm x 760mm leading to cable chamber tohave -(a) hinged aluminium chequered covers complete with wall catch.(b) cat ladders with 6 non-skip steps. Details as shown on drawings.Adequate natural ventilation required e.g. PC vent block/Aluminium ventpanels. Height: 2.0m with no part less than 1.5m. To paint the front andback of all beam with 50mmH red luminous paint. Chamber floor to be‘suspended’ type capable of supporting 400 kg/m2 (min).
Page 1 and 2: June 1999Handbook onApplication for
Page 3 and 4: Table of Contents
Page 5 and 6: 1. General Information1.1 Introduct
Page 7 and 8: 1.9 Tariffs1.9.1The types of tariff
Page 9 and 10: 3. Customer to submit an applicatio
Page 11 and 12: ii. All other developmentsThis cate
Page 13 and 14: essential for the new customers and
Page 15 and 16: Note 3 - Letter Of Consent From The
Page 17 and 18: Note 8 - Procedure For Application
Page 19 and 20: 3.1.3For private housing and indust
Page 21 and 22: 4. Grid's Substation Requirements4.
Page 23 and 24: It is the responsibility of the Lic
Page 25 and 26: 5.4 Protection RequirementsThe prot
Page 27 and 28: 6. Metering Requirements6.1 General
Page 29 and 30: and easily accessible to PSL's and
Page 31 and 32: (iii)(iv)(v)The requirements for th
Page 33 and 34: 22kV System66kV SystemContracted Ca
Page 35 and 36: Appendix 1 Form CS/1- Application f
Page 37 and 38: Appendix 3 Form CS/3- Letter of Con
Page 39 and 40: Appendix 5 Form CS/4- Request to Ha
Page 41 and 42: Appendix 7 Giro Application FormAPP
Page 43 and 44: Appendix 9 Drawing - 22KV/LV Substa
Page 45 and 46: Appendix 11 Drawing - Heavy Duty Al
Page 47: Appendix 13 Form CS/5- Checklist fo
Page 51 and 52: Appendix 15 Requirements to be indi
Page 53 and 54: Appendix 17 Protection Requirements
Page 55 and 56: Appendix 19 Form C- Certificate of
Page 57 and 58: Appendix 21 Application for Appoint
Page 59 and 60: Appendix 23 Technical Requirements
Page 61 and 62: Appendix 25 Drawing - Standard Mete
Page 63 and 64: Appendix 27 Drawing - Standard Size
Page 65 and 66: Appendix 29 Drawing - Methods of Se
Page 67 and 68: Appendix 31 Drawing - HV Metering K
Page 69: Appendix 32.2Drawing - HV Metering

Application for Electricity Supply - Corenet

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