METAL OXIDE SURGE ARRESTERPolymer housed for outdoor
applicationFeatures Better Electrical performance & reliability
Ease of Installation-Light weight & smaller size Better Operating
conditions Explosion & shatter proof & less mechanical damage to
nearby equipments Better performance in polluted environment
Vandalism resistant Free from Moisture ingress Higher safety Higher
mechanical strength Insensitive to UV radiation High resistance to
Ozone & Corona Excellent Tracking resistance Performance Data
System Voltage Rated Voltage (kV):0.1-275 Nominal discharge current
(kA) High current capability (4/10us) kA Energy Class : Energy
absorption Capability kJ/kV Short Circuit (Pressure relief) kA:40
Standard in accordance with:IEC60099-4 Porcelain housed for outdoor
application For protection of transformer & switchgear.
Highly non-linear MOV. Explosion Proof - Pressure Relief Design.
High energy handling capacity. Glazed brown Porcelain Housing.
Corrosion proof Aluminum alloy metal flange. Suitable for Ambient
-400C to +550C. manufactures effective surge protection device with
the modern technology of highly non-linear Zinc Oxide Varistor
blocks and thus diverts natural lightning surge and switching surge
to earth and simultaneously clip off any follow on current. Our
station class arresters are designed to provide maximum safety to
personnel and sub-station equipment even at the enormous short
circuit duty. Research and Development is an ongoing process at
Elektrolites with the active collaboration of experts in the
industry. CONSTRUCTION & OPERATING PRINCIPLE Lightning
Arrestors 11kV
No.DETAILUNITSDATA Type 11kV gapless type metal oxide
surgearrester - Distribution class1.Nominal system
voltagekV112.Highest system voltagekV123.Basic Insulation
Level (BIL)kV95 3. Ratings and type of
surge arrester 4.Specification to which surge arrester
complies IEC60099-45.Rated voltage of surge
arresterkV106.Nominal, 8/20 µs, discharge current rating ofsurge
arresterkA107.Maximum continuous operating voltage ofsurge
arresterkV7.38.Gapless or gapped type metal-oxide
surgearrester Gapless9.Material of insulation High
temperature vulcanised siliconrubber10.Rated frequency of surge
arresterHz5011.Design altitude of surge arrester (above sealevel)m1
400m12.Design ambient temperature of surge arresteroC-1
to4013.Specific creepage distance of surge
arrester.mm/kV25 Automatic earth lead
disconnectorsrequirements 14.Automatic earth lead
disconnectors to be fittedYes/NoYES
15.Corrosion protection of metal and alloy parts:galvanising
specification and/or stainless steel grade To SABS 763,
316 Tests 16.Previous type test results/certificate
to beprovided with bidYes/NoYes17.Routine test results/certificate
to be providedon deliveryYes/NoYes18.Drawing showing dimensions of
the arrestor tobe provided with the bidYes/NoYes19.Minimum one
minute wet power frequencywithstand voltage of external insulation
of surge arrester housingkV2820.Maximum steep current impulse
residualvoltage for a 10 kA, 1/20 µs, discharge
currentkV5021.Maximum lightning impulse residual voltagefor a 10
kA, 8/20 µs, discharge currentkV4022.Lightning, 1,2/50 µs, impulse
withstand levelof external insulation of surge arrester
housingkV9523.Line discharge class rating 124.Long duration
current, 2 000 µs, impulsewithstandA250 A25.High current, 4/10 µs,
impulse withstandkA100 kA26.Automatic earth lead disconnector to be
testedin accordance with IEC 60099-4Yes/NoYes
33kV
S/NTECHNICAL DETAILSUNITSDATA1.Type 33kV
gapless type metaloxide surge arrester -Distribution
class2.Nominal system voltagekV333.Highest system
voltagekV364.Power frequencyHz505.Basic Insulation Level
(BIL)kV170 3. Ratings and type of surge
arrester 6.Specification to which surge arrester
complies IEC 600997.Rated voltage of surge
arresterkV298.Nominal, 8/20 µs, discharge current rating of surge
arresterkA109.Maximum continuous operating voltage of surge
arresterkV2210.Gapless or gapped type metal-oxide surge
arrester Gapless11.Insulation Material Silicon
rubber12.Cantilever strength of surge arresterNm30013.Rated
frequency of surge arresterHz5014.Design altitude of surge arrester
(above sea level)m1 400m15.Design ambient temperature of surge
arresteroC-1 to 4016.Minimum phase-to-ground specific creepage
distance ofsurge arrester.mm/kV25 Automatic earth lead
disconnectors requirements 17.Automatic earth lead
disconnectors fittedYes/NoYes18.Corrosion protection of metal and
alloy parts: galvanising To SABS 763,
316
specification and/or stainless steel
grade Tests 19.Previous Type Test
reports/certificate from recognizedauthority to be provided
with bidYes/NoYes20.Minimum one minute wet power frequency
withstandvoltage of external insulation of surge arrester
housingkV7021.Maximum steep current impulse residual voltage for a
10kA, 1/20 µs, discharge currentkV99.722.Maximum lightning impulse
residual voltag
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