Power capacity, Input voltage and output voltage can be customized
Maintenance-free, easy to install, low comprehensive operating cost
Low loss, small noise, heat dissipation ability
Isolate dangerous voltages
Non grain core design for low remanence flux density for applications with specific in-rush current requirements
Dry type Air natural transformers are available with PT100 temperature probe and controller
| Mian Specification | |
| Type | isolating step down |
| Capacity | 15 - 2500kva (can be customized) |
| Voltage | 415V ( can be customized) |
| Phase | 3 |
| Winding material | Copper and Aluminum available |
| Insulation class | F (155°C) / H(180°C)/ C(220°C) |
| Attitude | 1000m , 2000m |
| Cooling | AN |
| Frequency | 50 /60Hz |
| Protection class | IP21 |
| Standard | AS/IEC 60076 |
| Vector group | Dyn11 |
| Efficiency | 98% |
| Noise level | 60dB |
| Service life | 30 years |
Routine Test | Type Test | Special Test |
a) Measurement of winding resistance | a) Lightning impulse test | a) Partial discharge measurement |
b) Measurement of voltage ratio and check of phase displacement | b) Temperature-rise test | b) Measurement of sound level |
c) Measurement of short-circuit impedance and load loss | c) Short-circuit test | |
d) Measurement of no-load loss and current | ||
e) Separate-source AC withstand voltage test | ||
f) Induced AC withstand voltage test | ||
g) Partial discharge measurement |
Varelen Electric Co., Ltd