Technical Specification 24kV Switchgear QGDW10316.docx

1、Technical Specification 24kV Switchgear QGDW10316Q/GDWJiangsu Electric Power CompanyCompany StandardQ/GDW-10-316-2007 Technical Specification of 20kV Alternating Current Gas Insulated Metal Enclosed SwitchgearReleased: Sep 20, 2007CONTENTForeword.31 Scope.42 Normative references.43 Environmental con

2、ditions54 Technical data and requirement .65 Test standard and requirement 12FOREWORDThe object of the standard is to promote application of 20KV for medium voltage network in Jiangsu Electric Power Company. The existing GB, DL and company standard provide very little requirement of 20KV electrical

3、equipment. This standard is edited In order to assure that the 20KV electrical equipment fulfill the network requirement.This standard is one of the 9 standards for 10KV and 20KV equipment, which are listed as below:1. Technical Specification of 220/110/20, 220/20KV Power Transformer 2. Technical Sp

4、ecification of 110/20KV Power Transformer 3. Technical Specification of 20KV Circuit Breaker4. Technical Specification of 20KV Disconnector5. Technical Specification of 20KV AC Metral Enclosed Switchgear6. Technical Specification of 20KV AC GIS Metal Enclosed Switchgear7. Technical Specification of

5、20KV Capacitor Banks8. Technical Specification of 20KV Shunt reactors9. Technical Specification of 20KV Earthing ResistorThe standard format is in accordance with GB/T 1.1 and DL/T 600-2001.The standard is proposed and explained by Jiangsu Power Company, Production & Technical Department.The standar

6、d is coordinated by Jiangsu Power Company, Production & Technical Department.The standard was edited by: - Jiangsu Power Company, Production & Technical Department- Suzhou Power Supply Company- Jiangsu Electric Test Institute Co., LtdEditor: Tang Jun, Gao Shan, Chen ShaoboTechnical Specification of

7、20KV AC GIS Metal Enclosed Switchgear1. ScopeThis technical specification classified groups of technical requirement including main technical parameters, functional design, construction, characteristics, installation and test, to which the 20KV GIS Switchgear with 0.3Mpa design pressure are subjecte

8、d.The requirement stipulated in the specification is the lowest technical requirement, not covering all details, neither covering all nominative references or standards. The equipment manufacturers shall provide high quality products in accordance to this standard, GB standard, DL standard and Inter

9、national standard.Where conflict exists between this standard and manufacturers standard, the higher standard shall apply.The neutral point of 20KV network is earthed via small resistance.2. Nominative ReferencesThe following referenced documents are indispensable for the application of this documen

10、t. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.GB 156Standard voltageGB 311.1Insulation co-ordination for high-voltage transmission and distribution equipmentGB 1408Test method of power

11、 frequency electric strength of solid insulating materialGB 2900.1Electrical Terms, Basic Terms GB 3309Mechanical test of HV Switchgear under normal temperatureGB 3906AC metal enclosed switchgear and controlgear for rated voltage above 3.6kv and up to and including 40.5kvGB 7354Measurement of partia

12、l dischargeGB / T 11022Common specification for high-voltage switchgear and controlgear standardsSD / T 318Technical specification of HV Switchgear interlocking deviceDL / T 402HV alternating-current Circuit BreakerDL / T 403Vacuum Circuit Breaker for rated voltage above 12kv and up to and including

13、 40.5kvDL / T 404Indoor HV AC SwitchgearDL / T 486AC HV Disconnector and Earthing SwitchDL / T 539Condensation test and dirty test ? of indoor AC HV Switchgear and componentsDL / T 593Common specification for high-voltage switchgear and controlgear standardsDL / T 615Selection of main parameter of H

14、igh-voltage AC circuit breakerDL / T 617Gas insulated metal enclosed switchgearDL / T 728GIS metal enclosed switchgear ordering guidanceDL / T 791Indoor gas insulated switchgearIEC 62271-102HV AC Disconnector and earthing switchIEC 62271-201AC metal enclosed switchgear and controlgear for rated volt

15、age above 1kv and up to and including 38kvIEC 60480Verification of SF6 gas in electrical equipmentJiangsu PSB2002 No 320Guideline of acceptance test and preventative test of electrical equipment 3. Environment conditions3.1Altitude1000m3.2Max. Ambient temperature+ 40C3.3Min. Ambient temperature- 25C

16、 （is this mandatory everytime?）3.4Max. Temperature change / day25K3.5Indoor relative humidityAverage per day 95%Average per month 90%3.6Resistance to earth-quakes(only 8DA and NX Plus C has an interntl report LD not)Horizontal: 02gVertical: 0.1gVibration: 5 cycles 5 with interval 2s Safety factor: 1

17、.673.7Rated frequency50Hz3.8InstallationIndoor 4. Technical data and requirement4.1Technical Data4.1.1Type20KV SF6 insulated metal enclosed switchgear4.1.2Rated voltage24kV4.1.3Rated frequency50Hz4.1.4Rated current panel:630A / 1250A / 2500A ( 8DA 2500A OK NX Plus C 200A)Rated current busbar1600A /

18、2000A / 2500A4.1.5Temperature Rise:Temperature rise of main circuit under rated current and rated frequency, should fulfill not only GB/T 11022 standard, but also the standard relevant to each individual components. The temperature rise of accessible enclosure and covers should not exceed 30K. ?4.1.

19、6Rated short circuit breaking current 25KA / 31.5KA (NX Plus C only 25kA)4.1.7Rated making current (peak)63KA / 80KA (NX Plus C only 63kA)4.1.8Rated short time withstand current (4s) mandatory ?25KA / 31.5KA4.1.9Rated peak withstand current63KA / 80KA4.1.10Insulation levela) Power frequency withstan

20、d voltage (1min)Phase to earth: 50 (65) KVIsolating distance: 64 (79) kVValues in brackets if neutral point not earthed most situation in Chinab) Lightning impulse withstand voltage (1.2/50s, peak)Phase to earth: 95 (125)KVOpen gap: 110 (145)kVc) creepage distancePure porcelain 18 mm/kVEpoxy 20 mm/k

21、V4.1.11Auxiliary voltageAuxiliary voltage: AC/DC 220VOpen / Close Solenoid: DC 220V4.2Circuit Breaker4.2.1TypeVacuum or SF64.2.2Rated Voltage24KV4.2.3Rated Frequency50Hz4.2.4Rated Current630A / 1250A / 2500A4.2.5Rated short circuit breaking current 25KA / 31.5KA4.2.6Rated making current (peak)63KA /

22、 80KA4.2.7Rated short time withstand current (4s)25KA / 31.5KA4.2.8Rated peak withstand current63KA / 80KA4.2.9Insulation levelSame as 4.1.104.2.10Operating auxiliary powerMotor: AC 220VOpen / Close Solenoid: DC 220V4.2.11InstallationRefer to scope of supply4.2.12Rated operating cycle:Main incomer a

23、nd Bus section:Outgoing:0 180s CO 180s CO0 0.3s CO 180s CO4.2.13Electrical and mechanical enduranceRated electrical endurance breaking short circuit current 30 times (20 times for 31.5KA)Rated electrical endurance breaking normal current 10000 timesMechanical endurance 10000 times 4.2.14Rated capaci

24、tor banks breaking current400 (630) A (what are SIEMENS value)4.2.15Rated small inductive breaking currentOver-voltage factor and chopping current should be provided by manufacturers4.2.16Free auxiliary contact for end user10NO + 10NC4.2.17Vacuum InterrupterService life: 20 yearsCeramic enclosureVac

25、uum 1.33x10-3Pa(translation to be checked later with VI)4.2.18Operating counters should be equipped with all circuit breakers. The counter should correct, reliable, long endurance, clear indication, installed at the front side of the panel, visible during operation.4.3Three-position disconnector4.3.

26、1Mechanical endurance: 2000 times without maintenance (mandatory) Ch4.3.2In order to isolating and earthing, 3-pos disconnector should be installed, with On / Off / Earth positions. Disconnector shall be installed in between busbar and circuit breaker. The fixed contact is on the busbar. (not valid

27、for the 2008 version)4.3.3Three phases of disconnectors should be simultaneously operated by one operating mechanism. The rated technical data fulfils item 4.3.14.3.4Reliable position indication with remote signalling should be provided in order to be easily inspected by the operators. Mal-ON/OFF of

28、 disconnector due to mechanical stress (i.g. caused by short circuit) during operation due to should be avoided. Disconnector shall be able to break small current (i.g. circuit breaker charging current). Instantaneous over voltage should not occur at control circuit or external enclosure during oper

29、ation.4.3.5Interlocking between 3-pos disconnector and circuit breaker should be provided.4.3.6Operating mechanism should be heat-proof, frigid-proof, dust-proof, moisture-proof, rust-proof.4.3.7Free auxiliary contact for buyer should be at lease 6NO+6NC. The contact should be able to break DC 220V,

30、 5A.4.4Current Transformer4.4.1Type: Cast Resin4.4.2Ratio and Accuracy: refer to scope of supply4.4.3Zero-sequence CT should be two-half types and fast saturated. Tight and stable installation, easy for maintenance and replacement.4.4.4Other requirement:a) primary terminal of current transformer inside panel should be copper ? type terminals. Screw type terminal is NOT allowed.b) Short time withstand current requirement is the same as for circuit breaker.c) Current transformer shall be fit for all type of operation mod