220kV three phase on load voltage regulator HV power transformer

We have adopted series of important reforms on the 220kV level there-phase oil-immersed on-load tap-changing transformer referring material,process and structure.The transformer has the features of small size,light weight,high efficiency,low loss,low noise,reliable operation etc.which can reduce a large amount of power network loss and operation expenses with significant economic benefits.

Product Details Company Profile

Description

Features:

1. Iron core is made of cold-rolled silicon-steel sheet with high conduction of magnetism and adopts pulling-plank structure,
so that its magnetic route is short, losses and noise level is low;
2. Compress wire is adopted for winding so losses are low and have good ability withstand short-circuit;
3. Its active part adopts special pressing method which could ensure reliable axial pressure;
4. The oil tank is bell type with the structure of full folding plate type, having an excellent exterior and easy for maintenance;
5. Adopting capsule-type oil container, it can reduce oil aging to the lowest degree.
6. Amount of local discharged: The apparent discharge amount is less than 80pC under the 1.5 times of rated voltage;
7. Noise: Products of 63MVA and below is lower than 58dB(AN);
8. Power loss: no-load loss is 30% lower than that of IEC standard;
9. Reliability: All in-service product have no damages or oil leakage occurred;

environment condition：
Device type:outdoor
Environment:Maximum temperature +40℃,minimum temperature -30℃
Altitude:≤1000 meters(＞1000 meters,need to modify temperature rise)
Relative temperature:≤90%(25℃)
Installation area with no corrosive gas and obvious fouling etc.

Main Technical Parameters:

Rated power (kVA)	High Voltage (kV)	H.V Tap range	Low Voltage (kV)	Connection Symbol	Short-Circuit Impedance (%)	No-load Loss (kW)			On-Load Loss (kW)			No-load Current (%)
Rated power (kVA)	High Voltage (kV)	H.V Tap range	Low Voltage (kV)	Connection Symbol	Short-Circuit Impedance (%)	9 Type	10 Type	11 Type	9 Type	10 Type	11 Type	No-load Current (%)
31500	220 242	±8×1.25% ±8×1.5%	6.3,6.6, 10.5,11, 20,34.5, 35,37, 38.5,66, 69	YNd11	12~14	38	34	30	135	128	128	0.7
40000						45	41	36	157	149	149	0.63
50000						54	49	43	189	180	180	0.56
63000						63	57	50	220	209	209	0.56
90000						80	72	64	288	274	274	0.49
120000						99	89	79	346	329	329	0.49
150000						116	104	93	405	385	385	0.42
180000						135	122	108	468	445	445	0.42