Compared wth the “9” type transformer, this transformer has an average reduction of about 30% in no-load losses. Compared with the JB/T10088-1999 standard, the noise is relatively low, with a reduction of approximately 7dB. The temperature rise of the oil surface and high and low voltage windings is about 20K-13K lower than the temperature rise limit, and there is a certain overload capacity. Strong short-circuit resistance and high reliability.

Structural features

lron core: Adopting a three-phase three column internal and external frame rolling structure, the core column has a muti- level stepped circular cross-section After roling the iron core, stress is removed through vacuum annealing; Slot shaped bending dlamp, pulling screw to tighten the body, Apply special adhesive on the surface of the iron core to ensure that it does not deform or rust.

Winding and body: The low-voltage winding is a four layer or double layer cyindrical (500KVA and below) or spiral (630kVA and above) winding with 1-6 wires winding in parallel; The wires are all drawn with oxygen free copper; The interlayer insulation of the high and low voltage windings is made of diamond dot adhesive paper, The axial oil duct of the high-voltage winding and the oll gap between the high and low voltage main air ducts are of a strut curtain structure; The iron yoke insulation and trapezoidal cushion block are integrated to evenly compress the body of the device; The body adopts a new type of hanging plate positioning structure, with longitudinal and transverse positioning to ensure that the body is stable and not displaced.

Fuel tank: It adopts a corrugated oil tank sealed structure, which is non oil leakage and maintenance free.

Main technical parameters

Rated capacity kVA	No-load loss kW	Load loss kW
30	0.0800	0.630/0.600
50	0.100	0.910/0.870
63	0.110	1.09/1.04
80	0.130	1.31/1.25
100	0.150	1.58/1.50
125	0.170	1.89/1.80
160	0.200	2.31/2.20
200	0.240	2.73/2.60
250	0.290	3.20/3.05
315	0.340	3.83/3.65
400	0.410	4.52/4.10
500	0.480	5.41/5.15
630	0.570	6.20
800	0.700	7.50
1000	0.830	10.3
1250	0.970	12.0
1600	1.170	14.5
2000	1360	18.3
2500	1600	21.2

Note:

1. The load loss value before the slash in the table applies to the Dyn11 or YZn11 coupling group, and the load loss value after thee slash applies to the Yyn0 coupling group.