35kV Double Winding OLTC Oil-immersed Power Transformers

Description

Scope of Application
800~31500/35 type oil-immersed transformer is suitable for AC 50Hz, rated working voltage 35kV power system, as a small and medium-sized substation substation substation equipment.

Model Meaning

Working Conditions
◇ Installation height: altitude not more than 1000m;
◇ Ambient temperature: -40°C ~+40°C

Structural Features
◇Iron core
The iron core is suitable for high-permeability grain-oriented cold-rolled silicon steel sheets. The iron core is a core iron core, a fully miter seam stacked iron core, and its iron core column is a circular section of multi-step steps, and the yoke and iron core are equal sections.
◇Winding
The windings are all concentric coils, and the high-voltage windings have taps corresponding to the tap voltage requirements, which are led to the tap changer, and the switch is installed on the box cover, and the tap can be converted after cutting off the power supply
Voltage.
◇Safety protection device
The transformer is equipped with a gas relay;
The transformer is equipped with a pressure relief valve;
◇Oil protection device
The transformers are equipped with oil storage cabinets, and one end of them is equipped with an oil level gauge;
A moisture absorber with an oil seal should be installed on the transformer oil storage cabinet;
◇Oil temperature measurement device
The transformers are fitted with a glass thermometer header on top of the tank. Reach into the oil 120 ± 10mm;
1000kVA and above transformers are equipped with outdoor signal thermometers;
◇Transformer tank and its accessories
The transformer is generally not supplied to the trolley, and the welding position of the bottom bracket should comply with the provisions of GB6451-1999;
The lower wall of the oil tank is equipped with an oil sample flap, and the lower part of the transformer tank is equipped with a sufficiently large oil drain valve;

Main Technical Parameters
35kV class 50kV· A~2500kV· A Three-phase double-winding non-excitation voltage regulation distribution transformer

Note 1: For rated capacity of 500kV· For transformers A and below, the load loss value above the slash in the table applies to the Dyn11 coupling group, and the load loss value below the slash applies to the Yyn0 coupling group.
Note 2: When the annual average load rate of the transformer is between 30% ~ 36%, the loss value in the table can be used to obtain the highest operating efficiency.

Oil-immersed 35kV class 630kV· A~31 500kV· A Three-phase double-winding non-excitation voltage regulation power transformer

Note 1: For transformers with a low voltage voltage of 10.5kV, a product with coupling group designation Dyn11 is available.
Note 2: The rated capacity is 3150kV· For transformers A and above, -5% tap position is the maximum current tap.
Note 3: When the annual average load rate of the transformer is between 35%~45%. Use the loss values in the table to achieve the highest operating efficiency.

35kV Class 2000kV· A~31 500kV· A Three-phase double-winding non-excitation voltage regulation power transformer

Note 1: For transformers with a low voltage voltage of 10.5kV, products with the designation Dyn11 of the uncoupled group are available.
Note 2: The maximum current tap is —7.5% tap position.
Note 3: When the annual average load rate of the transformer is between 35%~45%. Use the loss values in the table to achieve the highest operating efficiency.