ELECTRIC, WITH AN EDGE
ELECTRIC, WITH AN EDGE
1000kva transformers are very common transformers on the market.
People usually purchase 1000 kva transformers for shopping malls, residential areas, small factories and other population or industrial gathering areas.
But since 1000 kva transformers have multiple styles, such as dry-type transformers, oil-immersed transformers and so on.
The single oil-immersed transformer also contains pad mounted transformer, oil-immersed all-copper transformer, etc.
It is worth mentioning that all 1000 kva transformers are three-phase transformers.
Below, I will tell you the relevant information and performance of the 1000 kva transformer in detail.
At the same time, I will also introduce three 1000 kva transformers for you in detail.
Pofessional Manufacturer of Pad Mounted Transformer Substation Transformer，HV Power Transformer Single Phase Transformer IEEE/ANSI，CSA，DOE，AS/NZS，IEC and etc。standards
1000 kva oil-immersed distribution transformer is a new type of high energy-saving product.
Daelim’s oil-immersed distribution transformers comply with ANSIC57.12.00, IEC60076, GB1097 (power transformers) and GB/T6451 standards.
The core of 1000 kva oil-immersed distribution transformer adopts high magnetic permeability and low loss cold-rolled oriented silicon steel strip, and adopts a common lamination structure, which minimizes the distortion of magnetic flux density, thereby greatly reducing no-load loss and no-load current. .
The 1000 kva oil-immersed distribution transformer has a compact structure, reduces the radial force during short circuit, and has strong ability to resist sudden short circuit.
The 1000 kva oil-immersed distribution transformer has small no-load loss, small no-load excitation current and low noise.
Compared with the S9 product of the same capacity, the no-load loss is reduced by 30%, the no-load current is reduced by 50-70%, and the noise is reduced by 5-10DB. .
1. The 1000 kva oil-immersed distribution transformer is of a fully sealed structure, extending service life, free of hanging cores and maintenance-free;
2. The combined group of 1000 kva oil-immersed distribution transformers adopts Dyn11 to reduce the impact of harmonics on the power grid and improve the quality of power supply;
3. The upper and lower pressure windings are made of oxygen-free copper. The low-voltage windings of 500KVA and below adopt a double-layer cylindrical structure, and the high-voltage windings adopt a multi-layer cylindrical structure.
4. The 1000 kva oil-immersed distribution transformer iron core is made of imported high-quality cold-rolled silicon steel sheets, which greatly reduces no-load loss and no-load current, and stops tying the dead center to ensure the tightness of the dead center and reduce noise;
5.The 1000 kva oil-immersed distribution transformer is of a fully sealed structure, extending service life, free of hanging cores and maintenance-free;
| Grade | High voltage kv | Low voltage kv | Connection Symbol | Short Ciruit Impendence | Loss(W) | No-load loss Current | |
| No-load loss (W) | On-load loss (W) | ||||||
| 35 kV | 35 | 6.3 | Yd11 Ynd11 | 6.5 | 1160 | 11500 | 1 |
| 20 kV | 20 | 0.6 | Dyn11 Yyn0 | 5 | 1140 | 10250 | 0.6 |
| 10 kV | 10.5 | 0.4 | Dyn11 Yyn0 | 4.5 | 1150 | 10300 | 0.7 |
1000 kva dry-type transformers currently on the market are mainly epoxy resin cast three-phase dry-type transformers.
Daelim’s 1000kva transformers conform to UEC726, GB6450, GB/T10228-1997 standards.
This transformer has the characteristics of safety, flame retardant and fireproof, and no pollution.
It can be installed directly in the load center.
Maintenance-free and easy to install.
The 1000 kva dry-type transformer has good moisture-proof performance, and can be put into operation without pre-drying after outage.
The 1000 kva dry-type transformer has low loss, low partial discharge, low noise, and can operate at 120% rated load under forced air cooling.
The 1000 kva dry-type transformer is equipped with a complete temperature protection control system, which provides a reliable guarantee for the safe operation of the transformer. The reliability index of this product has reached the international advanced level.
1. The coil of the 1000 kva dry-type transformer is wound with copper wire or foil, reinforced with glass fiber, and the epoxy resin is vacuum-dried, degassed and dehumidified without filler and cast as a whole, with high mechanical strength, short-circuit resistance and strong impact resistance.
2. The head and end of the high-voltage winding and the intermediate tap of the 1000 kva dry-type transformer are embedded with copper inserts.
3. The iron core of the 1000 kva dry-type transformer is made of high-quality grain-oriented cold-rolled silicon steel sheets, with 45-degree full-inclined multi-step joints. The surface is covered with resin insulating coating, which is resistant to moisture, rust and noise.
4. The iron core, clamps and coils of 1000 kva dry-type transformers are clamped by elastic parts, so that the coils are in a stable compression state to reduce noise.
5. The transformer is designed according to self-cooling. Longitudinal ventilation passages are reserved inside the wall of the high (low) voltage coil cast as a whole. It can be equipped with a forced air cooling device (cooling fan). After the forced air cooling device is adopted, the output capacity can be increased by 20 %.
| Grade | High voltage kv | Low voltage kv | Connection Symbol | Short Ciruit Impendence | Loss(W) | No-load loss Current | |
| No-load loss (W) | On-load loss (W) | ||||||
| 35 kV | 38.5 | 0.4 | Dyn11 Yyn0 | 6 | 2700 | 11000 | 1 |
| 20 kV | 22 | 8 | 2300 | 10300 | 1 | ||
| 10 kV | 11 | 6 | 1760 | 8120 | 0.8 | ||
1000 kva pad mounted transformer is also known as pre-installed substation.
It is especially suitable for Bitcoin mining farms.
The 1000 kva padmount transformer is a low-voltage power supply line that converts a high-voltage 10 kV voltage step-down transformer into a low-voltage 0.4 kV three-phase four-wire power supply line.
The interior of the 1000 kva padmount transformer houses high voltage switchgear, distribution transformers and low voltage distribution units, including automatic power factor compensation.
It is a factory prefabricated indoor and outdoor compact power distribution equipment arranged according to a certain wiring scheme. , Fireproof, anti-theft, heat insulation, fully enclosed, movable steel structure box, especially suitable for urban network construction and reconstruction, is a brand-new substation emerging after civil substation.
1. The pad mounted transformer uses high-quality silicon steel sheets to make a brand new iron core；
2. The pad mounted transformer has long service life, low loss and low noise；
3. The pad mounted transformer is suitable for terminal type applications with or without taps；
4. The pad mounted transformer has the characteristics of high voltage and no floating neutral point；
5. Daelim’s 1000 kva pad mounted transformers comply with CSA, ANSIC.57, DOE and IEEE standards；
| High voltage kv | Low voltage (kv) | Loss (W) | Dimension (mm) | Weight (Kg) | ||||
| No-load loss | On-load loss | W | D | H | Oil Weight | Total Weight | ||
| 12470/7200 | 600Y/347 | 1150 | 10300 | 1651 | 1549 | 1854 | 650 | 3235 |
1000 kVA refers to the apparent power of the transformer. Under the rated load of the transformer, if the power factor of the transformer is considered as 0.8, the active power of the transformer is P=1000×0.8=800 kilowatts.
If a load of 1000 kilowatts is carried, the transformer will be overloaded, the temperature of the transformer will rise, the insulation aging will be accelerated, and the service life of the transformer will be reduced.
Under special circumstances, the short-term overload operation of the transformer should not exceed 1/3 of the rated load in winter and 15% in summer.
The limit of the overload operation time depends on the ambient temperature of the transformer and the multiple of the overload.
Calculated according to the rated current of the transformer
The primary side is approximately 0.058*KVA (transformer capacity, specification 10kV/0.4kV)
The secondary side is approximately 1.44*KVA (transformer capacity, specification 10kV/0.4kV)
1000*1.44=1440A=1000/0.4/√3=1445A
Depends on your S-type transformer, such as S7, 8, 9 transformers can exceed 20%.
Now the transformers from the power supply bureau are S11 and above, which are energy-saving transformers and cannot be overloaded and can only reach 90%.
1000 normal maximum current 1000/1.732/0.38=1520A
Three-phase transformer rated power: S=1.732UI
Knowing S and U, the rated current I can be obtained, which is the maximum current during normal operation.
If it is single phase then: S=UI
If it is a 10KV/0.4KV three-phase transformer, then:
The rated current of the high-voltage side is I1=1000K/1.732/10K=57.74A
The rated current of the low-voltage side is I2=1000K/1.732/0.4K=1443.4A
In addition, the transformer allows short-term overload operation (such as one or two hours), so the actual current of the transformer during operation may exceed over its rated current I.
High and low voltage side current calculation, transformer capacity/voltage level/1.732*rated current
Transformer capacity is 1000kVA
High-voltage side current: 1000/10/1.732=57.736A
Low-voltage side current: 1000/0.4/1.732=1443.418A
The transformer capacity is 1000kVA, and the known high-voltage side current of the transformer is 57.736A.
Select the current mutual inductance 100/5, the magnification is 20 times, the calculation method of the secondary side current: 57.736/20=2.8868A.
A 1000kVA transformer can output 600kW of active power when the power factor cosφ=0.6; but when the power factor cosφ=0.9, it can output 900kW of active power.
If 1 kWh of electricity is 1 yuan, when the power factor is 0.6, the transformer can generate economic benefits of 600 yuan/hour; when the power factor reaches 0.9, the transformer can generate 900 yuan/hour of economic benefits.
SC(B)10-1000KVA/10KV series dry transformer no-load loss standard is 1770W;
SC(B)11-1000KVA/10KV series dry transformer no-load loss standard is 1590W;
S11-1000KVA/10KV series oil-immersed transformer no-load loss standard is 1150W;
The no-load loss standard of SH15-1000KVA/10KV amorphous alloy oil-immersed transformer is 450W.
Remember the current value of the high and low voltage sides of a transformer with a common capacity, and linear derivation can be performed for other capacities.
For a 1000KVA transformer, the calculated value of the current on the high-voltage side is 57.73, and the calculated value of the current on the low-voltage side is 1443.42.
Then remember this value, and other capacities can be derived from this. For example, for a 1600KVA transformer, the high-voltage side current is 1600/1000*57.73=92.368A, and the low-voltage side current is 1600/1000*1443.42=2309.472A
It is necessary to know the demand factor of the equipment and the power factor of each equipment to be able to calculate.
If you don’t know it, you can make a rough estimate, generally 45% to 75% of the transformer capacity for compensation.
If you have more inductive equipment, you can use 60~75% to compensate.
The 1000KVA transformer should be equipped with a compensation capacitor with a capacity of 420kvar.
Factory natural power factor before compensation = 0.8. When the power factor is increased to 0.95 through capacitance compensation, the compensation capacitance is 0.42kvar per 1KW of power, so the capacity of the compensation capacitor that should be configured for a 1000KVA transformer = 1000*0.42=420kvar.
Calculate the reactive power compensation capacity according to the capacity of the transformer:
The efficiency of the transformer is generally 0.8, and the power factor under load is usually around 0.7. When the power factor increases from 0.7 to 0.95, the reactive power compensation capacity per KW is 0.691 kilowatts. Calculate the reactive power compensation capacity according to the capacity of the transformer:
Qc=transformer capacity (KVA)×0.8×0.691
1000 kilowatts is the active power power, and the motor power is 1000KW.
1000 kVA is the capacity, and the transformer capacity is 1000KVA, which includes active power and reactive power, because only the purely resistive load power factor is 1, and neither the inductive load nor the capacitive load is 1.
Generally, the load rate of the transformer is about 85%, and 1000KVA can carry a load of about 850KW.
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