1.4. THREE-PHASE DOUBLE-WINDING OIL-IMMERSED TRANSFORMERS of 220 and 330 kV

Type Rated capacity, kVA Rated winding voltage, kV Type, range and
number of voltage
regulation steps
Winding
scheme and
connection
group
Cooling
HV LV
ТРДН-25000/330-У1 25000 347 6,6-6,6 OLTC in neutral of
HV ± 16% (± 9 steps)
Ynd11d11 ONAF
ТРДНС-25000/330-У1 25000 330 6,3-6,3 OLTC in neutral of
HV ± 16% (± 9 steps)
ТРДНС-25000/220-У3 25000 230 6,3-6,3; 6,6-6,6 OLTC in neutral of
HV ± 12% (± 8 steps)
ТРДН-32000/220-У1 32000 230 6,3-6,3; 6,6-6,6;
11,0-11,0; 11,0-6,6
OLTC in neutral of
HV
± 12% (± 12
steps)
ТРДНС-32000/220-У1 32000 230 6,3-6,3
ТРДНС-40000/220-У1 40000 230 6,3-6,3;
11,0-11,0
ТРДН-63000/220-У1 63000 230 6,3-6,3; 6,6-6,6;
11,0-11,0; 11,0-6,6
ТРДЦН-63000/220-У1 63000 230 6,3-6,3; 6,6-6,6;
11,0-11,0; 11,0-6,6
OFAF
ТРДЦН-63000/220-У1 63000 230 10,5–10,5 Ynd11 ONAN / ONAF/
OFAF
ТРДН-80000/220-УХЛ1 80000 230 11,0-11,0 Ynd11d11 ONAF
ТДЦН-100000/220-У1 100000 230 22,0 YNyn0 OFAF
ТРДЦН-100000/220-У1 100000 230 10,5–10,5;
11,0-11,0
Ynd11d11 OFAF
ТРДЦН-125000/220-У1 125000 230 11,0-11,0 Ynd11d11 OFAF
ТДЦН-160000/220-У1 160000 230 22,0 OLTC in neutral of
HV ± 16% (± 9 steps)
YNyn0 OFAF
ТДЦН-200000/220-У1 200000 231 15 OLTC in neutral of
HV +4 х 1,25% / -8 х
1,25%
Ynd11 ONAN / ONAF/
OFAF
ТДЦН-400000/220-У1 400000 231 15,75