E2 Environmental class
C2 Climate class
F1 Fireproof class
Maintenance free, Sustainable
High voltage multilayer segmented cylindrical structure, low voltage longitudinal airway foil structure
Vacuum pressure casting technology of H-class epoxy resin, with lower partial discharge
Thin insulation structure, cold and thermal shock for crack resistance
The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel laminations insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise.
Clamping frame processed by CNC cutting, bending and then one-time punch forming, the hole’s size is accurate and the appearance looks delicate.
The winding coil is made of oxygen-free copper, class H for main insulation materials and coil is insulated by NOMEX paper of DUPONT brand, LV winding is isolated by copper foils. All these make the heat-resistant is up to 220℃, with excellent overload capacity and low loss, but high efficiency.
| Main Specifications | |
Dry-type transformer type | Cast resin |
Rated capacity | 30kva-25MVA |
Rated Voltage | 6kv-35kv |
Phases | single or three phase |
Tapping | With tapping links or on-load tap changer |
Impedance | On request |
Frequency | 50/ 60Hz |
Vector groups | Dy, Yy, Yd as standard. Other on request |
| Winding material | Copper/ Aluminum |
Class insulation | According to IEC 60085, Class F or Class H |
Temperature rise | With ambient temperature in accordance with IEC 60076-11 |
Type of cooling | AN/AF |
IP rate | IP00 to IP54 |
| Attitude | 1000m |
Environment class | E2 |
Climate class | C2 |
Fireproof class | F1 |
| Standard | IEC60076/ ANSI |
| Cast Resin Dry Type Transformer Accessories |
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For each transformer are prepared and issued a test report, in accordance with IEC 60076. except for routine tests, we also offer type tests and specialised tests to meet all customer requirements. We make what matters work for our customers in a safe and reliable way.
Routine test
a) Measurement of winding resistance
b) Measurement of voltage ratio and check of phase displacement
c) Measurement of short-circuit impedance and load loss
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
Type test
a) Partial discharge measurement
b) Temperature-rise test
Special test
a) Lightning impulse test
b) Measurement of sound level
c) Short-circuit test
Varelen Electric Co., Ltd