YB series prefabricated substations (hereinafter referred to as box type substations) are suitable for electric power users such as subways, airports, ports, stations, industrial and mining enterprises, and various public buildings (such as hotels, hospitals, high-rise buildings, stadiums). Used for AC 50Hz and 60Hz, high voltage side rated voltage 3.6~40.5kV, low voltage side rated voltage 220~690V, rated capacity 2000kVA and below system. It can be used as a permanent power supply device and as a temporary power supply for construction sites. It is a pre-installed substation with outdoor use conditions accessible to the public, which can replace civil substations.
Remark:
Generally, transformer capacity below 315kVA is measured by low voltage, while capacity above 315kVA is measured by high voltage.
Name | Unit | Data | ||||
Rated frequency | Hz | 50/60 | ||||
High voltage unit | Rated voltage | kV | 3 | 6 | 10 | 35 |
Maximum working voltage | kV | 3. 6 | 7. 2 | 12 | 40.5 | |
Power frequency withstand voltage to earth/interphase isolating distance | kV | 25/ 27 | 30/ 34 | 42/ 48 | 95/ 118 | |
Lightning impulse withstand voltage to earth/ interphase isolating distance | kV | 40/ 46 | 60/ 70 | 75/ 85 | 185/ 215 | |
Rated current | A | <=630 | ||||
Rated short-time withstand current | kA/ 2s (kA/ 4s) | 12. 5 ,16,20,25,31. 5 | ||||
Rated peak withstand current | kA | 31. 5 ,40,50,63,80 | ||||
\ | Rated voltage | V | 220 | 380 | 690 | |
Rated current of main circuit | A | <=3200 | ||||
Rated short-time withstand current | kA/ 1s | 15,30,50 | ||||
Rated peak withstand current | kA | 30,63,105 | ||||
Rated current of branch circuit | A | <=1600 | ||||
Reactive power compensation capacity | kvar | <=600 | ||||
Transformer unit | Rated capacity | kVA | <=2000 | |||
Impedance voltage | % | 4,4. 5 ,6 | ||||
Tap ranges | ±2X2. 5%,±5% | |||||
Connections | Y/ Yn0 ,D/ Yn11 |
Generally, transformer capacity below 315kVA is measured by low voltage, while capacity above 315kVA is measured by high voltage.