Open Ventilated Dry Type transformers (OVDT)
Open Ventilated Dry Type transformers are produced and supplied based on the latest technology of transformer design with C-class thermal resistance.
One of the most important advantages of this kind of transformer is the possibility of utilizing it in prohibited areas for installing oil transformers such as indoor locations.
Features:
- Possibility to be produced at all voltage levels up to 36 KV and 5 MVA capacity
- Thermal class: C
- On-Site repair
- 10 to 20 db noise level reduction compared with normal transformers
- Residual current and no-load loss reduction
- Anti-explosion and anti-flammability properties
- No chemical pollution or toxic substances
- Ease of installation and operation
- Ideal for installation in limited spaces and skyscraper floors
- Customized design based on special requirements
| Technical Specification for OVDT (11/0.4KV) | ||||||||||||||
| Rated Power (KVA) | 50 | 100 | 160 | 200 | 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 |
| Rated HV/LV Voltage (KV) | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 | 11/0.4 |
| (%) Taps in HV | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 |
| Rated Frequency(Hz) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| Vector Group | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 |
| (%) Short Circuit Voltage | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Max. Ambient Temp (oC) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
| Max.Altitude above sea level (m) | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| Rated HV Current (A) | 2.62 | 5.25 | 8.4 | 10.5 | 13.12 | 16.5 | 21 | 26.24 | 33.06 | 41.99 | 52.49 | 65.61 | 83.98 | 104.97 |
| Rated LV Current (A) | 72.2 | 144.3 | 231 | 289 | 361 | 455 | 577 | 722 | 909 | 1155 | 1443 | 1804 | 2309 | 2887 |
| No-Load Losses (W) | 540 | 659 | 714 | 801 | 937 | 1077 | 1194 | 1277 | 1643 | 2118 | 2649 | 2859 | 3891 | 3989 |
| Short Circuit Losses in 120oC (W) | 989 | 1902 | 3076 | 3779 | 4541 | 4946 | 5984 | 6343 | 8580 | 9199 | 10809 | 12672 | 14444 | 19399 |
| Applied Insulation Test Voltage (KV) | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 | 28/3 |
| Technical Specification for OVDT (20/0.4KV) | ||||||||||||||
| Rated Power (KVA) | 50 | 100 | 160 | 200 | 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 |
| Rated HV/LV Voltage (KV) | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 | 20/0.4 |
| (%) Taps in HV | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 |
| Rated Frequency (Hz) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| Vector Group | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 | Dyn5 |
| (%) Short Circuit Voltage | 4 | 4 | 4 | 4 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Max. Ambient Temp (oC) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
| Max. Altitude above sea level (m) | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| Rated HV Current (A) | 1.44 | 2.89 | 4.7 | 5.77 | 7.22 | 9.09 | 11.55 | 14.43 | 18.2 | 23.09 | 28.87 | 36.1 | 46.2 | 57.7 |
| Rated LV Current (A) | 72.2 | 144.3 | 231 | 289 | 361 | 455 | 577 | 722 | 909 | 1155 | 1443 | 1804 | 2309 | 2887 |
| No-Load Losses (W) | 580 | 675 | 758 | 821 | 984 | 1111 | 1231 | 1299 | 1683 | 2158 | 2709 | 2998 | 3922 | 4050 |
| Short Circuit Losses in 120oC (W) | 1000 | 1952 | 3176 | 3954 | 4696 | 5021 | 6080 | 6472 | 8881 | 9354 | 10859 | 12792 | 14581 | 19589 |
| Applied Insulation Test Voltage (KV) | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 | 50/3 |
| Technical Specification for OVDT (33/0.4KV) | ||||||||||||||
| Rated Power (KVA) | 50 | 100 | 160 | 200 | 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 |
| Rated HV/LV Voltage (KV) | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 | 33/0.4 |
| (%) Taps in HV | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 | ±5 |
| Rated Frequency (Hz) | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| Vector Group | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 | Dyn1 |
| (%) Short Circuit Voltage | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Max. Ambient Temp (oC) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 |
| Max.Altitude above sea level (m) | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| Rated HV Current (A) | 0.87 | 1.74 | 2.8 | 3.5 | 4.37 | 5.5 | 7.1 | 8.75 | 11.02 | 13.99 | 17.5 | 21.87 | 28 | 35 |
| Rated LV Current (A) | 72.2 | 144.3 | 231 | 289 | 361 | 455 | 577 | 722 | 909 | 1155 | 1443 | 1804 | 2309 | 2887 |
| No-Load Losses (W) | 680 | 775 | 1100 | 1300 | 1410 | 1690 | 1890 | 2050 | 2330 | 2841 | 3310 | 3750 | 4010 | 4930 |
| Short Circuit Losses in 120oC (W) | 1280 | 2400 | 3670 | 4480 | 5200 | 5750 | 6900 | 7100 | 9200 | 10470 | 11900 | 13900 | 14850 | 2250 |
| Applied Insulation Test Voltage (KV) | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 | 70/3 |
