Dry-type transformers are widely used in local lighting, high-rise
buildings, airports, terminal CNC machinery equipment and other
places. Simply put, dry-type transformers refer to transformers
whose cores and windings are not immersed in insulating oil.
Characteristic structure
Temperature control system
The safe operation of dry-type transformers and its service life
depend to a large extent on the safety and reliability of
transformer winding insulation.
cooling method
Dry-type transformer cooling methods are divided into natural air
cooling (AN) and forced air cooling (AF). When natural air cooling,
the transformer can run continuously for a long time under the
rated capacity. When forced air cooling, the output capacity of the
transformer can be increased by 50%. It is suitable for
intermittent overload operation or emergency accident overload
operation; due to the large increase in load loss and impedance
voltage during overload, it is in a non-economic operation state,
so it should not be kept in continuous overload operation for a
long time.
Technical Parameters
1. Frequency of use: 50/60HZ;
2. No-load current: <4%;
3. Compressive strength: 20000V/min without breakdown; testing
instrument: YZ1802 withstand voltage tester (20mA);
4. Insulation grade: F grade (special grade can be customized);
5. Insulation resistance: ≥2M ohm test instrument: ZC25B-4 type
megohmmeter <1000 V);
6. Connection mode: Y/Y, △/Y0, Yo/△, auto-coupling (optional);
7. Allowable temperature rise of coil: I00K;
8. Heat dissipation method: natural air cooling or temperature
control automatic heat dissipation;
9. Noise coefficient: ≤30dB.
10KV-SCB dry type transformer main technical data
Rated power (kVA) |
High voltage (kV) |
H.V.Tap (kVA) |
Rated Frequency (Hz) |
Low Voltage (kV) |
Vector group |
Short circuit impedance |
No-load loss(w) |
On-load loss(w) |
No-load loss circuit (%) | Main Body (without shell) |
| | | | | | | | | |
L*W*H(mm) |
Weight (Kg) |
| 20 | 6 6.3 6.6 10 10.5 11 |
±5% or +2×2.5% |
50 |
0.4 |
Yyn0 Dyn11 |
4 | 190 | 710 | 2.3 | 585*400*561 | 205 |
| 30 | | | | | | | 190 | 710 | 2.3 | 585*400*561 | 230 |
| 50 | | | | | | | 270 | 1000 | 2.2 | 585*400*636 | 300 |
| 80 | | | | | | | 370 | 1380 | 1.7 | 700*500*759 | 395 |
| 100 | | | | | | | 400 | 1570 | 1.7 | 710*500*779 | 475 |
