8/12/2019 MINERA Technical Data Sheet - GEen 02 M en-50464-1 BoBk Rev A

http://slidepdf.com/reader/full/minera-technical-data-sheet-geen-02-m-en-50464-1-bobk-rev-a 1/2

 

standardsThese transformers comply with standards:■  EN 50464-1■  EN 60076-1 to 10

Products assembled using new components, PCB-free guaranted

descriptionMineral oil-immersed, 50 Hz, three-phasedistribution transformers with the followingcharacteristics:■  hermetically sealed with integral filling■  cover bolted to the tank■  ONAN-type natural cooling■  Indoor/outdoor use  (depending on selected fittings and options)

■  anti-corrosion surface treatment :corrositivity category C3, “Medium”

durability (according to ISO 12944-2)■  final colour grey RAL 7033■  protection index IP00 (coverless version)

liquid dielectric■  new insulating mineral oil■  tested in accordance with IEC 60296■  compatible with all the transformer’s

components

standard fittings■  one 3 or 5 positions off-circuit tap changer

on the cover, with padlocking■  3 HV plug-in bushings (250 A / 24 kV)

on the cover■  4 LV flat-bars (from 250 kVA)

  4 LV porcelain bushings (from 50 to 160 kVA)

■  4 bi-directional flat rollers■  2 lifting and untanking lugs■  2 pulling eyelets on the frame■  2 earthing terminals on the cover

(M12 studs)

■  1 filling plug■  1 draining device (according to EN 50216-4)

■  1 aluminium rating plate

optional fittings■  protection relays (DMCR® or DGPT2®)

on the filling plug■  1 free, thermometer pocket■  control device in the thermometer pocket

(pointer thermometer with 0 or 2 contacts max,2-contact thermostat, etc.)

■  3 HV, 250 A porcelain bushings■  4 LV porcelain bushings (from 250 kVA) ■  LV, sealable cover, rated IP21 or IP54

(only with plug-in bushings on the HV side)

■  locking device for plug-in bushings  (with or without lock)

■  3 mobile connectors for plug-inbushings – straight or elbow

  (cable characteristics must be specified)

■  liquid retention container

B0 B

k

B0

Bk

electrical characteristics

24 kV for 20 kV

± 2,5 % and/or ± 5 %

Yzn 11 (50 kVA version only)Dyn 11

 

110 180 260 360 440 520 610 730 680 800 940 1150 1450 1800 2150

  875 1475 2000 2750 3250 3850 4600 5400 5600 7000 9000 11000 14000 18000 22000

  B0Bk  B0Bk B0Bk B0Bk  B0Bk  B0Bk  B0Bk  B0Bk  B0Bk B0Bk  B0Bk  B0Bk  B0Bk  B0Bk  B0Bk

  4 4 4 4 4 4 4 4 6 6 6 6 6 6 6

  1 1 0,8 0,8 0,8 0,8 0,8 0,7 0,7 0,7 0,7 0,7 0,7 0,7 0,7

  10 9 9 8 8 8 8 8 8 6,5 6,5 6,5 6,5 6,5 6,5

  0,2 0,3 0,3 0,3 0,3 0,3 0,3 0,35 0,35 0,4 0,45 0,45 0,45 0,45 0,45

  1,81 1,54 1,32 1,17 1,11 1,04 1,00 0,93 ,093 1,05 1,08 1,06 1,05 1,08 1,06

  3,57 3,43 3,31 3,22 3,17 3,13 3,10 3,06 3,06 4,35 4,37 4,35 4,35 4,37 4,35

  98,07 98,37 98,61 98,77 98,84 98,92 98,97 99,04 99,04 99,03 99,02 99,04 99,04 99,02 99,04

  97,60 97,97 98,27 98,47 98,56 98,65 98,71 98,80 98,80 98,80 98,77 98,80 98,81 98,78 98,81

  98,42 98,67 98,86 98,99 99,05 99,11 99,15 99,21 99,21 99,22 99,21 99,22 99,23 99,21 99,23

  98,03 98,35 98,58 98,74 98,81 98,89 98,95 99,01 99,01 99,02 99,01 99,03 99,04 99,02 99,04

  42 44 47 50 52 53 54 55 55 56 58 59 61 63 66

  33 35 37 40 42 42 43 44 44 45 47 48 49 51 54

  50 100 160 250 315 400 500 630 630 800 1000 1250 1600 2000 2500

no-load

due to load at 75°C

combination of lossesaccording to EN 50464

(1) reminder of insuation levels:

(2) measurements according to IEC 60076-10

rated insulation level  (kV) 7,2 12 17,5 24

kV eff, 50 Hz - 1 mn 20 28 38 50

kV choc, 1,2/50 µs 60 75 95 125

HV/LV distribution transformersground-mounted, mineral oil-immersed transformersfrom 50 to 2500 kVAinsulation voltage ≤ 24 kV – EN 50464-1, losses (High efficiency)

Minera

rated power  (kVA)

rated voltageprimary 15 and/or 20 kV

400 to 433 V between phases, 231 to 250 V phase to neutralsecondary at no-load

rated insulation level (1) primary 17,5 kV for 15 kV

MV tapping range (off-circuit)

vector group

losses (W)

rated impedance voltage (%)

no-load current (%)

switching currentIe/In peak value

time constant

voltage drop

at full load (%) = 1

 = 0,8

efficiency (%) 

100 %load

75 %load

 = 1

 = 0,8

 = 1

 = 0,8

noise leveldB(A)

(2)

acoustic power LWA

acoustic pressure LPA at 1 m

P.F.

P.F.

P.F.

P.F.

P.F.

P.F.

No-load losses performanceMinera oil-immersed transformers

according to EN 50464-1

Load losses performanceMinera oil-immersed transformers

according to EN 50464-1

E0

D0

C0

B0

A0

Standard efficiency

Dk

Ck

Bk

Ak

Optimum efficiency

Standard efficiency

Optimum efficiency

8/12/2019 MINERA Technical Data Sheet - GEen 02 M en-50464-1 BoBk Rev A

http://slidepdf.com/reader/full/minera-technical-data-sheet-geen-02-m-en-50464-1-bobk-rev-a 2/2