SZ11-5000KVA on-load voltage regulator transformer

The primary and secondary coils of a common transformer are concentrically sleeved on an iron core post, with low-voltage windings inside and high-voltage windings outside. (The original and secondary coils of the electric welding machine transformer are installed on two iron core posts).

When the SZ11-5000KVA on-load voltage regulator transformer is running with a load, when the secondary side current increases, SZ11-5000KVA on-load voltage regulator transformer must maintain the main magnetic flux in the core unchanged, and the primary side current must be increased accordingly to achieve a balanced secondary side current.

The secondary active power of the transformer is generally equal to the rated capacity of the transformer (KVA) × 0.8 (transformer power factor) = KW.

The main power transformers are:

A. Moisture absorber (silicone tube): SZ11-5000KVA on-load voltage regulator transformer is equipped with silica gel. The insulating oil in the oil storage tank (oil pillow) is connected to the atmosphere through the moisture absorber. The desiccant absorbs moisture and impurities in the air to keep the internal winding of the transformer Insulation performance; discoloration and deterioration of silica gel can easily cause blockage.

B. Oil level gauge: SZ11-5000KVA on-load voltage regulator transformer reflects the oil level of the transformer. Generally it is around + 20O. If the oil level is too high, you need to drain the oil. If it is too low, you need to refuel. In summer, when the load is heavy, the oil temperature rises and the oil level rises slightly.

C. Oil pillow: Adjust the oil volume of the fuel tank to prevent the transformer oil from oxidizing too fast. There are oil filling holes in the upper part.

D. Explosion-proof pipe: SZ11-5000KVA on-load voltage regulator transformer need to prevent sudden accidents from causing explosion danger due to pressure buildup in the fuel tank.

E. Signal thermometer: monitor the operating temperature of the SZ11-5000KVA on-load voltage regulator transformer and send out signals. Indicated is the upper oil temperature of the transformer, and the transformer coil temperature is 10 ° C higher than the upper oil temperature. The national standard stipulates that the maximum working temperature of the transformer winding is 105 ° C;

F. Tap changer: change the voltage ratio by changing the high-voltage winding taps and increasing or decreasing the number of winding turns.
 

 U1 / U2 = W1 / W2, U1W2 = U2W1,

U2 = U1W2 / W1.

General transformers are no-load voltage regulators which need to be powered off: three points of I, II, III + 5%, 0%, -5% (one time is 10.5KV, 10KV, 0.95KV, two times are 380V, 400V, 420V ), Generally placed in the Ⅱ gear when leaving the factory.

G, gas signal relay: (gas relay) light gas, heavy gas signal protection. The upper contact of SZ11-5000KVA on-load voltage regulator transformer is a light gas signal which generally acts on the signal alarm to indicate that the transformer is operating abnormally. The lower contact is a heavy gas signal. After the signal is issued, the circuit breaker trips, drops the card, and alarms. Generally, the gas relay is full of oil. Gas, when there is gas in the fuel tank, it will enter the gas relay. When it reaches a certain level, the gas squeezes away the oil storage to make the contacts act. Open the cover of the gas relay and there are two adjusting rods on the top. Unscrew one of the caps to release the relay. Gas inside; another adjustment lever is a protective action test button; when operating with electricity, you must wear insulating gloves and emphasize safety.