Zinc Oxide Surge Arrester PEXLIM Q

Transcription

1 Zinc Oxide Surge Arrester Protection of switchgear, transformers and other equipment in high voltage systems against atmospheric and switching overvoltages. in areas with high lightning intensity and high energy requirements. where grounding or shielding conditions are poor or incomplete Superior where low weight, reduced clearances, flexible mounting, non-fragility and additional personnel safety is required. Major component in PEXLINK TM concept for transmission line protection. Brief peformance data System voltages (U m ) voltages (U r ) Nominal discharge current (IEC) Classifying current (ANSI/IEEE) Discharge current withstand strength: High current 4/10 µs Low current 2000 µs Energy capability: Line discharge class (IEC) [2 impulses, (IEC Cl ) Fulfils/exceeds requirements of ANSI transmission-line discharge test for 362 kv systems. Short-circuit / Pressure relief capability External insulation Mechanical strength: Declared permissible static service load (DPSSL) Maximum permissible dynamic service load (MPDSL) Service conditions: Ambient temperature Design altitude (Higher altitudes on request) Frequency kv kv 10 ka peak 10 ka peak 100 ka peak 900 A peak Class kj/kv (U r )] 50 ka sym Fulfils/exceeds standards Nm Nm -50 C to +45 C max m Hz I-1

2 Silicone-housed arresters Guaranteed protective data Max. System U m U r Max. continuous operating voltage 1) IEC U c ANSI/IEEE MCOV TOV capability 2) 1 s 10 s Max. residual voltage with current wave 30/60 µs 8/20 µs 0.5 ka 1 ka 2 ka 5 ka 10 ka 20 ka 24 3) ) More detailed information on the TOV capability and the protective characteristics are given in Publ. 1HSM en. 1) The continuous operating voltages U c ( IEC) and MCOV ( ANSI) differ only due to deviations in type test procedures. Uc has to be considered only when the actual system voltage is higher than the tabulated. Any arrester with U c higher than or equal to the actual system voltage divided by 3 can be selected. 2) With prior duty equal to the maximum single-impulse energy stress (4.5 kj/kv (U r )). 40 ka 3) Arresters for system voltages 36 kv or below can be supplied, on request, when the order also includes arresters for higher system voltages. Arresters with lower or higher rated voltages may be available on request for special applications. I-2 Edition 5.1, ABB Surge Arresters Buyer s Guide

3 Guaranteed protective data Max. Max. continuous operating voltage 1) TOV capability 2) Max. residual voltage with current wave U m U r IEC U c ANSI/IEEE MCOV 1 s 10 s 30/60 µs 8/20 µs 0.5 ka 1 ka 2 ka 5 ka 10 ka 20 ka More detailed information on the TOV capability and the protective characteristics are given in Publ. 1HSM en. 1) The continuous operating voltages U c ( IEC) and MCOV ( ANSI) differ only due to deviations in type test procedures. Uc has to be considered only when the actual system voltage is higher than the tabulated. Any arrester with U c higher than or equal to the actual system voltage divided by 3 can be selected. 2) With prior duty equal to the maximum single-impulse energy stress (4.5 kj/kv (U r )). 40 ka 3) Arresters for system voltages 36 kv or below can be supplied, on request, when the order also includes arresters for higher system voltages. Arresters with lower or higher rated voltages may be available on request for special applications. I-3

4 Silicone-housed arresters Technical data for housings Max. system voltage U m U r Housing Creepage distance mm External insulation *) 1.2/50 µs dry 50 Hz wet (60s) 60 Hz wet (10s) 250/2500 µs wet Dimensions Mass A max B C D Fig XV XV XV XV XV XV XH XV XV XV XH XV XV XV XV XH XH XV XV XM XH XH XV XV XH XH XV XV XV XH XH XV XH XH Neutral-ground arresters XN XN XN XN XN XN XN XN XN *) Sum of withstand voltages for empty units of arrester. I-4 Edition 5.1, ABB Surge Arresters Buyer s Guide

5 Technical data for housings I-5

6 Silicone-housed arresters Accessories Line terminals Earth terminals Drilling plans Without insulating base 1HSA L Aluminium 1HSA A Stainless steel Aluminium NOTE! Alternative drilling plan 3 slotted holes (120 º), n14 at R With insulating base 1HSA M Aluminium flag with other items in stainless steel 1HSA B Stainless steel 1HSA N Aluminium 1HSA A Epoxy resin M12 bolts for connection to structure are not supplied by ABB. Required threaded grip length is mm. 1HSA P Stainless steel I-6 Edition 5.1, ABB Surge Arresters Buyer s Guide

7 Shipping Data Housing Ur 24 XV XV036 Number of arresters per crate One Three Six Volume m 3 Gross Volume m 3 Gross Volume m XV XV XV XV XH XV XV XV XH XV XV XV XV XH XH XV XV XM XH XH XV XV XH XV XV XV XH XH XV XH Neutral-ground arresters XN XN XN XN XN XN XN XN , 144 XN Gross Each crate contains a certain number of arrester units and accessories for assembly and erection. A packing list is attached externally on each crate. Each separate crate is numbered and the numbers of all crates and their contents are listed in the shipping specification. ABB reserves the right to pack arresters in the most effective/economic combination. Alternate or non-standard crates may involve additional charges. I-7