Three-phase Isolation Transformer
10-15 2024 | By:
Three-phase power isolation transformer
Using an isolation transformer to establish a new neutral line-grounding can eliminate the common mode interference and other neutral line problems in the power grid. The isolation transformer converts the three-wire △ connection into a four-wire Yo system. Adding shielding further eliminates the high-frequency pulse interference and noise coupled by the transformer. Although the shielded isolation transformer can effectively prevent various N-G interference (pulses and high-frequency noise), the transformer must be properly and strictly grounded, otherwise the anti-common mode interference will be ineffective. Our company designs and produces high-quality isolation transformers for customers. Features and advantages:
l High isolation
l Good N-G performance
l High common mode interference suppression
l Convert △ to Y or Y to △
l Easy conversion of voltage taps
l Designed according to the user’s special performance requirements
Three-phase power isolation transformer
Three-phase power isolation transformer Applications
l Installed at the input or output of the voltage stabilized power supply
l Any system that requires isolation and shielding
Typical applications of isolation transformers installed on voltage stabilized power supplies
1. Connect an isolation transformer (delta/star) to the power input
1. If the third harmonic and interference signal of the power grid are serious, the use of △/Yo isolation transformers can remove the third harmonic and reduce interference signals.
2. A new neutral line can be generated by a △/Yo isolation transformer, so that the equipment is independent of the neutral line of the power grid, avoiding abnormal operation of the equipment due to poor neutral line of the power grid.
3. Current waveform distortion caused by nonlinear loads (such as third harmonics) can be isolated without polluting the power grid.
Three-phase power isolation transformer
2. Connect an isolation transformer (star/delta) at the output end of the power supply
1. Prevent current distortion of nonlinear loads from affecting the normal operation of the voltage-stabilized power supply and returning to the power grid, thus purifying the power grid.
2. The distortion of nonlinear load current affects the accuracy of sampling. You can sample at the input end of the Yo/△ isolation transformer to obtain a control signal that reflects the actual situation, so that the voltage-stabilized power supply can be controlled normally.
3. If the load is unbalanced, the use of Yo/△ will not affect the normal operation of the voltage-stabilized power supply.
3. Three-phase power isolation transformer Technical indicators
1 Input rated voltage: three-phase 380V or single-phase 220V
2 Operating frequency: 50Hz-60Hz
3 Efficiency: ≥98%
4 Temperature rise: <85℃
5 Waveform distortion: <0.1%
6 Insulation strength: 3000V, no breakdown for 1 minute
7 Insulation resistance: Winding insulation resistance to ground three-phase ≥3.8M omega; single-phase ≥2.2M omega
4. Three-phase power isolation transformer Use conditions
1 Applicable altitude: ≤5000m
2 Ambient temperature: -15℃～+40℃
3 Relative humidity: ≤85%
4 The installation site should be free of gases, steam, chemical deposits, dirt, conductive dust and other explosive, flammable and corrosive substances that seriously affect the insulation strength of the voltage stabilizer.
5 Any use conditions that do not meet the above conditions should be negotiated with us.
5. Winding connection method of three-phase isolation transformer
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