SCB 10-10KV series resin casting dry-type voltage transformer
| Rated capacity(KVA) | Voltage Combination and tap range | connection of transformer winding | No-load loss
(w) | Load loss (W) | No-load current (%) | Short circuit impedance (%) |
| High voltage(KV) | Highvoltage taps range (%) | Low voltage(KV) |
30
50
80
100
125
160
200
250
315
400
500
630
630
800
1000
1250
1600
2000
2500 |
6
6.6
6.6
10
10.5
11 |
±5%
±2x2.5% |
0.4 |
Dyn11 | 130
190
260
280
330
380
435
505
615
685
810
940
910
1065
1240
1460
1715
2135
2520 | 710
1000
1380
1570
1850
2130
2530
2760
3470
3990
4880
5880
5960
6960
8130
9690
11730
14450
17170 | 2.6
2.2
2.2
2
1.8
1.8
1.6
1.6
1.4
1.4
1.4
1.2
1.2
1.2
1.1
1.1
1.1
1.0
1.0 | 4
4
4
4
4
4
4
4
4
4
4
4
6
6
6
6
6
6
6 |
Structural features of epoxy dry type transformer
1. The high and low voltage windings are all wound with copper
strip;
2. The high and low voltage windings are all epoxy in vacuum and solidified to form a
high
strength glass reinforced steel structure;
3. The high and low voltage windings are provided with longitudinal
ventilation ducts
according to the heat dissipation requirements;
Technical features of epoxy dry type transformer
1 . The damage or partial aging of electrical insulation mostly
starts from partial discharge, which is
harmful because the insulation life decreases rapidly and affects
the safe operation. Due to its unique
structure, the high and low voltage windings of the dry type
transformer are all made of copper strip and
foil, and the advanced manufacturing technology, the high and low
voltage windings are all epoxy and
solidified in vacuum, which makes the partial discharge value low
2. strong ability of resisting lightning impulse: Because the high
and low voltage windings are all made of
copper strip and foil, the interlayer voltage is low and the
capacitance is large, and the initial voltage
distribution of foil windings is close to linear, therefore, it has
strong ability of resisting lightning impulse
and strong ability of resisting short circuit: Because the high and
low voltage windings have the same
reactance, no spiral angle phenomenon
3. good anti-cracking performance: The dry-type transformer uses
the 1-3mm technology of epoxy thin
insulation, which can meet the requirements of anti-cracking after
long-term operation in low temperature,
high temperature and wide range of temperature changes The problem
of cracking which is difficult to solve
in 6mm thick insulation technology is solved, and the dry-type
transformer is guaranteed in technology.
Points to note for transport
(1) The slope of the power transformer shall not exceed 15%
(2) To prevent transformer vibration and collision
(3) The bushing, oil pillow, temperature, gas relay, radiator pipe
and explosion-proof cylinder of the
transformer can not bear greater mechanical force, and must not
collide with these parts and devices
during transportation and hoisting
(4) When hoisting the transformer, the special rings under the oil
tank should be used to bear the load,
the heat pipe can not bear the load, otherwise it will be damaged,
leaking,
bending or deformation
