C.02 MV Switchgear - VN - Centrepoint

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  • MEDIUM VOLTAGE SWITCHBOARDS

    The English language version prevails. u tin ting Anh khi c tranh ci.

    Centrepoint Page 1 of 16 of C.02 18 September 2007

    MEDIUM VOLTAGE SWITCHBOARDS

    T NG CT TRUNG TH

    1 GENERAL 1 TNG QUAN The aim of this document is to give the detailed description of the Medium Voltage Switchboards to be used in the current project.

    Mc ch ca ti liu l cung cp m t chi tit v t ng ngt trung th c s dng cho cng trnh ny.

    1.1 FUNCTIONAL DESCRIPTION 1.1 M T The Medium Voltage Switchboards Scope of Works includes the detailed design, engineering, workshop drawings preparation and approval, manufacturing, factory testing, supply, delivery, installation, testing and commissioning and finally handover to the Employer of the Medium Voltage Switchboards rated as shown on the relevant drawings in the framework of entire project completion.

    Phm vi cng vic t ng ngt trung th bao gm: Chun b cc bn v thit k chi tit, bn v k thut, bn v ch to v c duyt, thc hin cc kim tra ti nh my, ni sn xut, cung cp, giao hng, lp t, kim tra chy th v bn giao sau cng n ngi ch ca t ng ngt trung th vi cng sut c ch ra trn bn v lin quan trong khun kh ca vic hon thnh ton b d n .

    1.2 CROSS REFERENCES 1.2 THAM CHIU CHO

    General Worksection General Requirements Related worksections Worksection Electrical General Requirements Distribution Transformers Power Cables

    Tng qut Cc yu cu tng qut ca phn cng vic. Cc chng lin quan Cc yu cu tng qut v in ca phn cng vic. Cc my bin p phn phi Cc cp ng lc

    1.3 STANDARDS 1.3 TIU CHUN

    General The Medium Voltage Switchboards shall comply with the latest issues of the following IEC recommendations: IEC 60056 High Voltage Alternating Current Circuit Breakers IEC 60129 High Voltage A.C. Switchgear and controlgear disconnectors (isolators) and earthing switches. IEC 60185 Current transformers for measurement and protection. IEC 60186 Voltage transformers for measurement and protection. IEC 60265-1 High voltage Switch for rated voltages above 1 KV and less than 52 KV IEC 60298 AC Metal Enclosed Switchgear and ControlGear for Rated Voltages above 1 kV and up to and Including 54 kV

    Tng qut Cc t ng ngt trung th phi ph hp vi cc n bn mi nht do IEC gii thiu IEC 60056, My ct dng in xoay chiu cao th IEC 60129, ng ct in p xoay chiu cao th, iu khin dao cch ly v cu dao tip t IEC 60185, Bin dng cho o lng v bo v. IEC 60186, Bin p cho o lng v bo v. IEC 60265-1, ng ngt trung th cho in p nh mc trn 1KV dui 52KV IEC 60298, V t kim loi ca cc thit b ng ngt v cc thit b iu khin cho in p nh mc trn 1 kV n 54 kV. IEC-60282-1, Cu ch trung th.

  • MEDIUM VOLTAGE SWITCHBOARDS

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    Centrepoint Page 2 of 16 of C.02 18 September 2007

    IEC 60282-1 HV fuses IEC 60420 High voltage a.c. Switchgear and control gear switch - fuse combinations. IEC 60529 Degrees of protection provided for enclosures (IP Code) IEC 60605 Approval and test specification general requirements for electrical equipment. IEC 60694 High voltage A.C. Switchgear and control-gear-circuit breakers for rated voltages above 1000V.

    IEC 60420, Thit b ng ngt trung th v cc thit b iu khin - kt hp cu ch. IEC 60529, Cp bo v cho v t (M IP) IEC 60605, Cc yu cu k thut tng qut v ph duyt v th nghim cho cc thit b in. IEC 60694, Thit b ng ngt xoay chiu trung th v ng ngt b phn iu khin cho in p nh mc trn 1000V.

    1.4 DESIGN 1.4 THIT K

    General The Medium Voltage Switchboards shall be designed in accordance with the above-mentioned standards, and applicable drawings. The Medium Voltage Switchboards shall be capable of continuous duty at rated voltage/frequency stated in this specification.

    Tng qut T ng ngt trung th c thit k ph hp vi cc bn v p dng, v cc tiu chun nu trn. T ng ngt trung th phi c kh nng vn hnh lin tc ti in p/tn s c ni r trong c tnh k thut ny.

    System Technical Parameters Rated voltage 24 kV Operating voltage 22 kV Frequency 50 Hz

    Cc thng s k thut ca h thng in p nh mc 24 kV in p vn hnh 22 kV Tn s - 50 Hz

    Main Substation MV Switchboard Rated voltage 24 kV Operating voltage 22 kV Frequency 50 Hz Rated power frequency withstand voltage - 50 kV - 50 Hz, 1 min Rated lightning impulse withstand voltage - 125 kV - 1,2/50 s Rated short-circuit breaking current - 20 kA - 1 s.

    T ng ngt trung th chnh in p nh mc 24kV in p vn hnh 22 kV Tn s - 50 Hz Chu ng c in p 50 kV tn s 50 Hz, thi gian 1 pht. Chu c in p xung st 125 kV thi gian 1,2/50 s. Dng ct ngn mch nh mc 20 kA 1 giy.

    Service conditions The Medium Voltage Switchboards shall be suitable for installation and operation in Vietnam and the environmental conditions described in the data sheets and project specifications. The Tenderer shall demonstrate facility for in country support and technical back up for the equipment offered. The manufacturer shall be responsible for ensuring that all equipment and components supplied are suitable for the operation and conditions stated. Where the manufacturer standard or preferred design option does not meet the operation or environmental conditions, the manufacturer shall give details of the technical changes and commercial impact of complying with the stated conditions. The Medium Voltage Switchboards shall

    Cc iu kin phc v T ng ngt trung th ph hp cho vic lp t v vn hnh ti Vit Nam v cc iu kin mi trng c m t trong cc trang s liu v c tnh k thut ca d n. Nh cung cp phi chng minh c c c s h tr sn sng trong nc v d phng k thut cho cc thit b c trnh duyt Nh ch to c nhim v bo m rng tt c thit b v cc phn hp thnh c cung cp ph hp cho vic vn hnh v cc iu kin nu r trn. Ti nhng ch m tiu chun ca nh ch to hay s la chn thit k u tin khng thch hp vi cc iu kin hot ng hay iu kin mi trng, th nh ch to phi ch ra chi tit cc thay i k thut v cc nh hng thng mi n cc iu kin nh. T ng ngt trung th c thit k

  • MEDIUM VOLTAGE SWITCHBOARDS

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    Centrepoint Page 3 of 16 of C.02 18 September 2007

    be designed for ambient temperature of 40C.

    cho iu kin mi trng 40C.

    Safety and Reliability The Medium Voltage Switchboards shall be designed to minimise any risk of an internal short circuit and shall be of metal clad design. In the event of any internal arcing fault on a functional unit, the damage shall be confined to that unit so that the busbars and all other functional units are undamaged and operational. The Medium Voltage Switchboards design shall incorporate arc fault containment features. The level of arc containment test to which the switchboard complies shall be stated and any required features (e.g. vent flaps) shall be identified. The Medium Voltage Switchboards shall be designed in such a manner that all components shall be operated and maintained safely and shall not present a hazard to personnel or cause damage to other equipment. The metal enclosure shall be hermetically sealed and safe to touch. All MV and internal drive parts shall be maintenance-free for at least 10 years or 10 000 mechanical operations. Switchgear shall be arc-fault tested

    S an ton v tin cy T ng ngt trung th c thit k nhm gim thiu ti a ri ro, nguy him ca s ngn mch bn trong v c v bng kim loi. Ngay c bt k dng h quang no bn trong b phn hot ng, s h hng s c gii hn trong b phn nh vy cc thanh ci v cc b phn hot ng khc khng b h hng v vn c th dng c. T ng ngt trung th c thit k kt hp vi cc tnh nng ngn chn dng r h quang. Kim tra cp dp dng h quang cho t trung th phi c ch r v bt k tnh nng yu cu no u c ch ra (v d cc cnh thng gi). T ng ngt trung th c th k theo cch m trong tt c cc phn hp thnh c vn hnh v bo tr an ton v khng c hin din bt k mi nguy hi no n ngi hay gy h hi n cc thit b khc. V t kim loi bt kn v an ton khi chm vo.

    Tt c cc phn trung th v cc phn chuyn ng bn trong th hot ng (khng cn bo tr) ti thiu 10 nm hay 10 000 ln vn hnh c kh. Phn ng ngt phi c kim tra r-h quang.

    Submission The Contractor shall submit for the Engineers approval the following workshop drawings and calculations: - Single Line Diagram - Protection Diagram - Calculation of prospective relay

    settings - Types, model numbers and ratings

    of assemblies. - Detailed dimensions. - Shipping sections, general

    arrangement, plan view, front elevations and cross-section of each compartment.

    - Projections from the assembly that may affect clearances or inadvertent operation, such as handles, knobs

    - Fixing details for floor or wall mounting.

    - External and internal paint colours and paint systems.

    - Construction and plinth details, ventilation requirements

    - Engraving Mimic Diagram

    trnh Nh thu s trnh nhng tnh ton v bn v thi cng c s chp thun ca k s: - S n tuyn - S bo v - Tnh ton cc ci t r le. - Kiu, s m en v nh mc cho

    cc b phn lp rp. - Cc kch thc chi tit. - Cc cng on vn chuyn, sp

    xp chung, mt bng, mt ng pha trc v mt ct ca tng b phn.

    - Nhng ch nh ra ca cc b phn c th nh hng n cc khong khng hay cc thao tc khng ch , nh mc quai, tay nm.

    - Chi tit bt vo sn hay gn trn tng.

    - H thng sn v mu sn bn trong v bn ngoi.

    - Cc chi tit b my v kt cu, cc yu cu thng gi.

    - S ch th.

  • MEDIUM VOLTAGE SWITCHBOARDS

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    Centrepoint Page 4 of 16 of C.02 18 September 2007

    - Manufacturers name - Type designation - Purchaser order number

    - Tn nh ch to. - La chn loi. - S n t hng.

    2 QUALITY 2 CHT LNG

    2.1 MAIN OFFER 2.1 CHO HNG CHNH The Main Offer shall comprise a quotation including: - The technical proposal to meet the

    Specification - Proposed variances with respect to

    the Specification - This document shall be

    accompanied by at least the following:

    - Technical d