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{"title":"31.5 MVA 220 KV Oil-Immersed Transformer with OLTC IEC Certified for Grid","imgUrl":"https:\/\/img.chinax.com\/nimg\/08\/cc\/67bb6e51e0f7547002073574905e-200x200-1\/31_5_mva_220_kv_oil_immersed_transformer_with_oltc_iec_certified_for_grid_substations_cooper_core.jpg","attrs":{"Payment Terms":"T\/T","Frequency":"50\/60Hz","Type":"power transformer, Oil-immersed","Rated voltage":"10kV-35kV"}}
{"title":"High insulation rating IEC60076 Three-Phase Oil type Step-Up with conservator","imgUrl":"https:\/\/img.chinax.com\/nimg\/91\/ae\/0fedfa2a7816a925ae90888ac239-200x200-1\/high_insulation_rating_iec60076_three_phase_oil_type_step_up_with_conservator_transformer_500kva_0_69kv_11kv_for_solar_pv_power_pl.jpg","attrs":{"Brand Name":"HENTG POWER","Model Number":"500KVA-0.69\/11kV","Certification":"CE","Place of Origin":"China"}}
{"title":"High Efficiency 66kV Power Transformer with 100MVA Rated Power and IP23","imgUrl":"https:\/\/img.chinax.com\/nimg\/9d\/bc\/e625550fbe0d178c8fd8ba3428b1-200x200-1\/high_efficiency_66kv_power_transformer_with_100mva_rated_power_and_ip23_protection_level_for_reliable_performance.jpg","attrs":{"Brand Name":"HENTG Power","Certification":"CE","Place of Origin":"China","Overload Capacity":"1.2 times rated power for 2 hours"}}
{"title":"110kV High Voltage Transformer with IP23 Protection and IEC 60076 Compliance for","imgUrl":"https:\/\/img.chinax.com\/nimg\/0c\/1a\/5201d77b8c3e0e7a3df0d0e1669e-200x200-1\/110kv_high_voltage_transformer_with_ip23_protection_and_iec_60076_compliance_for_efficient_power_transmission.jpg","attrs":{"Brand Name":"HENTG Power","Certification":"CE","Place of Origin":"China","Minimum Order Quantity":"1"}}
{"title":"Compact Outdoor Power Station with Oil Immersed Prefabricated Substation 10KV\/0","imgUrl":"https:\/\/img.chinax.com\/nimg\/ac\/f9\/9c1f9430eb615c09fa81fd262b7e-200x200-1\/compact_outdoor_power_station_with_oil_immersed_prefabricated_substation_10kv_2f0_4kv.jpg","attrs":{"Brand Name":"HENTG POWER","Certification":"ISO\/CE","Place of Origin":"Jiangsu, China","Material":"Cooper\/Aluminum Core"}}
Double-winding OLTC 110kV Power Transformer - Trusted Solution for Long-Term Power Infrastructure
HENTG POWER Double-winding OLTC 110kV Power Transformer offers a reliable solution for long-term power infrastructure with high reliability, strong voltage regulation capability, and optimized total cost of ownership. The 40000 kVA 110 kV oil-immersed main power transformer is a dependable choice for utilities, EPC contractors, and energy investors seeking stable and secure high-voltage power transmission solutions.
Key Features
Customizable voltage up to 132kV
High short circuit withstand capability
Low loss design for cost savings
Customized transformer solutions available
Compact dimensions and reduced weight
Extended operational lifespan
Ester oil insulation for superior fire safety
7-step stepping lap iron core structure with cold rolled grain oriented silicon steel
High-temperature and low-temperature resistant insulation system
Technical Specifications
Transformer Type
Oil Immersed
Rated Capacity
40MVA
Rated Voltage
110kV (customized up to 132kV)
Frequency
50/60Hz
Phase
Three Phase
Winding Material
Copper / Aluminum
Insulation Class
A (105℃), E (120℃), B (130℃)
Vector Group
Dyn11 YNd1d1, etc.
Cooling
ONAN, KNAN, ONAF, KNAF
Dielectric Liquid
Mineral oil, Silicone, FR3 Oil, Midel etc.
Tap Changer
Off-load or on-load
Ambient Temperature
-45℃ ~ +50℃
Standard
IEC, AS, EN, IEEE, ANSI, GOST
Accessories
Conservator, Pressure Relief Device, Tap Changer, Oil Temperature Indicator, Bucholz Relay, Lifting Lugs
All transformers can be designed, customized, and supplied with a wide variety of accessories as required.
Custom Product Options
K-Factor Rated
Harmonic Mitigation
Custom Dimensions for Size & Weight Constraints
Custom Enclosures for Tough Environmental Conditions
Unique Input and Output Voltages
Low Inrush Current
6, 12, 18, 24 and 36 Pulse Drive Isolation Transformers
Rectifier Duty
High Efficiency
Low Audible Noise
Low Temperature Rise
Marine Duty
Hazardous Location
Each transformer is prepared and issued with a test report in accordance with IEC 60076. In addition to routine tests, we also offer type tests and specialized tests to meet all customer requirements. We ensure our products work safely and reliably for our customers.
Routine Tests
Measurement of winding resistance
Measurement of voltage ratio and check of phase displacement
Measurement of short-circuit impedance and load loss
Measurement of no-load loss and current
Separate-source AC withstand voltage test
Induced AC withstand voltage test
Partial discharge measurement
Type Tests
Lightning impulse test
Temperature-rise test
Determination of sound level for each method of cooling
Measurement of the power taken by the fan and liquid pump motors
Measurement of no-load loss and current at 90% and 110% of rated voltage
Special Tests
Partial discharge measurement
Measurement of sound level
Short-circuit withstand test
Determination of capacitances windings-to-earth, and between windings
Vacuum deflection test on liquid immersed transformers
Pressure deflection test on liquid immersed transformers
