1.7. THREE-PHASE TWO- AND THREE-WINDING OIL-IMMERSED TRANSFORMERS of 110 and 220 kV FOR METALLURGY


Type

Rated power, kVA Rated winding voltage, kV Type, range and
number of voltage
regulation steps
Winding
scheme and
connection
group


Cooling

HV LV
ТДТНМ-40000/63000/110-У1 40000/
63000
115 38,5 6,6 OLTC in neutral of
HV ± 16%, ± 9 steps;
NLTC on the MV side
of 34.5 and 38.5 kV
± (2х2,5%)
Ynd11d11


ONAF

ТДТНМ-63000/110-У1 63000 115 38,5 6,6 YNyn0d11
ТДНМ-63000/100000/110-У1 63000 /
100000
115 - 38,5 OLTC in neutral of HV
±16%, ±9 steps
Ynd11
ТРДНМ-63000/100000/220-У1 63000 /
100000
230 - 11,0-11,0 OLTC in neutral of HV
± 12% (± 12 steps)
Ynd11d11
ТДЦНМ-100000/160000/220-У1 100000 /
160000
230 - 38,5 OLTC in neutral of HV
± 12% (± 8 steps)
Ynd11


OFAF

ТДЦНМ-100000/200000/220-У1 100000 /
200000
230 - 38,5 Ynd11
ТДЦНМ-160000/250000/220-У1 160000 /
250000
230 - 38,5 Ynd11
ТДЦНМ-160000/320000/150-У1 160000 /
320000
158 - 38,5 Ynd11