33kV prefabricated Substation
33kv prefabricated transformer substation refers to the complete set of pre-installed and type tested equipments. The main components include 33kV series transformers, high-voltage switchgear, low-voltage switchgear and ccorresponding internal connecting wires (cables, buses and others) and other auxiliary equipments. These elements are enclosed by a common enclosure or a group of enclosures.
Technical data
High voltage compartment | Item | Unit | Parameter |
Rated frequency | Hz | 50 /60 Hz | |
Rated Voltage | KV | 30KV 33KV 35KV 36KV | |
Max service voltage | KV | 40.5KV | |
Rated current | A | 400, 630, 1000, 1250 ,1600, 2000, 2150 | |
Transfer current | A | 1200 -3150 A | |
1MIN Power frequency withstand voltage, earth -phase | KV | 42/48, 85/95 | |
1MIN Power frequency withstand voltage, phase/fracture | |||
BIL | KV | 75/85, 170/185 | |
Rated short circuit breaking current | KA | 20, 31.5 | |
Transformer | Rated voltage | KV | 30KV 33KV 35KV 36KV |
Rated power capacity | KVA | 50 KVA Upto 2.5 MVA | |
Tapping range | % | ±2 X 2.5% , ±5% | |
Vector group | Yyn0, Dyn11 | ||
Short-circuit Impedance | % | 6-7.5 | |
Low voltage | rated voltage | V | 380, 400, 415, 433, 440, 660, 690 or customized |
main circuit rated current | A | 50 -4000 | |
branch current | A | 5-800 | |
Enclosure | protection level | ||
HV compartment | IP33, IP65.. | ||
LV compartment | IP33 | ||
Transformer compartment | IP23 | ||
Noise level | dB | ≤ 50 | |
