What is 3 Phase Step Down Transformer?
A Three-Phase Step-down or 3 PH step down transformer is an electrical apparatus that
transforms three-phase energy into single-phase energy. It consists of three outputs
with varying phases. These three
phase transformers are utilized in sectors where the voltage and current
fluctuate. They are recognized for their great efficiency, low expense, and
high-power factor.
Types of 3 Phase Step Down Transformer:
As 3 Phase step-down transformer suppliers in India, we offer different types of
transformers for various applications.
- Dry-Type Three-Phase Step Down Transformers: They provide a
secure and dependable option for voltage conversion without employing oil as a
cooling agent. These transformers use air or another insulating gas, such as
nitrogen, for cooling purposes, which makes them eco-friendly and decreases the
potential fire risks linked to oil-filled transformers. They are perfect for
indoor setups and areas where safety is a key concern, like hospitals, schools,
and commercial structures. Dry-type transformers generally use windings
impregnated with epoxy resin or varnish, which offer outstanding insulation and
mechanical durability. They need very little upkeep compared to oil-filled
transformers, removing the necessity for oil testing and changing.
- Delta-Delta (Δ-Δ) Connection 3 Phase Step Down Transformer:
Both the primary and secondary windings in this circuit use the delta (mesh)
arrangement. The delta-delta type achieves outstanding unbalanced load
management without requiring a neutral connection. As a result, this connection
shows limitations in managing harmonic currents and typically serves
distribution functions with lesser frequency than alternative transformer types.
Certain applications requiring a reference at the neutral cannot be properly
executed due to the absence of this point. Delta-delta transformers serve
industrial applications because they handle phase shift problems without
complications.
- Delta-Star (Δ-Y) Connection 3 Phase Step Down Transformer: The
distribution systems utilize this form of step-down transformer as their most
commonly deployed configuration. The delta configuration of the primary winding
pairs with the secondary winding's star (wye) setup. Circuits of secondary stars
include an important neutral reference point for powering single-phase
electrical loads. Through this connection, systems achieve better voltage
balance and provide a ground fault detection pathway. Delta-star transformers
are commonly utilized to reduce the voltage from the distribution level to the
consumer level.
- Star-Star (Y-Y) Connection 3 Phase Step Down Transformer: In
this arrangement, the primary and secondary windings are both linked in a star
format. Although easier to build, this type may face problems with voltage
instability, especially with unbalanced loads. It is also vulnerable to third
harmonic currents. Star-star configurations are less frequent for distribution
transformers in comparison to delta-star. They may be employed in particular
scenarios where the drawbacks are alleviated or are less significant.
- Star-Delta (Y-Δ) Configuration 3 Phase Step Down Transformer:
In this setup, the primary winding is connected in a star arrangement while the
secondary is in a delta configuration. This setup is rarer for step-down
transformers within distribution networks. It is frequently found in step-up
applications at power generation facilities. The delta configuration on the
secondary side does not offer a neutral. This variant is suitable for situations
where a phase shift is necessary or a delta configuration is required for the
load.
Technical Specifications of 3 Phase Step Down Transformer:
Being 3 PH step-down transformer manufacturers in India, our products are equipped
with various advanced features; here we have added a technical sheet for more
details.
Specifications |
Dry Type |
Delta-Delta (Δ-Δ) Connection |
Delta-Star (Δ-Y) Connection |
Star-Star (Y-Y) Connection |
Star-Delta (Y-Δ) Configuration |
Voltage (Primary) |
415 V, 6.6 kV, 11 kV, 22 kV, 33 kV |
11 kV, 33 kV |
11 kV, 33 kV |
11 kV, 33 kV, 66 kV |
11 kV, 33 kV, 66Kv |
Voltage (Secondary) |
415 V, 230 V, 120/240 V |
415 V, 230 V |
415 V, 230 V |
415 V, 230 V, 120/240 V |
415 V, 230 V |
Phase |
Three |
Three |
Three |
Three |
Three |
Power |
10 kVA - 5 MVA |
100 kVA - 5 MVA, Medium |
500 kVA - 20 MVA, High |
50 kVA - 2 MVA, Medium |
100 kVA - 5 MVA, Medium |
Efficiency |
97 - 99% |
98-99% |
98-99.5% |
97-99% |
98-99% |
Frequency |
50/60 HZ |
50 Hz / 60 Hz |
50 Hz / 60 Hz |
50 Hz / 60 Hz |
50 Hz / 60 Hz |
No Load Loss |
NA |
500 W - 2 kW |
1 kW - 5 kW |
400 W - 1.5 kW |
500 W - 2 kW |
Load Loss |
- |
5 kW - 20 kW |
10 kW - 40 kW |
4 kW - 15 kW |
5 kW - 20 kW |
Winding Configuration |
NA |
Delta-Delta |
Delta-Star |
Star-Star |
Star-Delta |
Brand |
Sahara Transformers |
Sahara Transformers |
Sahara Transformers |
Sahara Transformers |
Sahara Transformers |
Features of 3 Phase Step Down Transformer:
As 3 phase step-down transformer suppliers in India, the following are the features
of 3 Phase Step-down Transformer in India.
- Voltage Reduction: This system exists to convert high-voltage
transmission or distribution levels into proper voltage supports for
residential, industrial, and commercial settings. Different voltage levels
between input and output are controlled through coil turn ratio operations.
- Three-Phase Power: They process three-phase power systems which
constitute standard power distribution for industrial and commercial operations
to distribute energy with efficiency and balance.
- Different Winding Configurations: Multiple winding setups such
as Delta-Delta, Delta-Star, Star-Star, and Star-Delta exist to fulfill
specialized application targets including when a neutral connection is needed.
- High Efficiency: The voltage conversion process remains
efficient because well-designed transformers achieve an efficiency rate greater
than 98%.
- Cooling Systems: During operation, the equipment can utilize
either oil-immersed systems or dry-type techniques to dissipate heat production
for continued safe and dependable operation.
Benefits of Using Our 3 Phase Step Down Transformer in India:
As 3 Phase step down transformer manufacturers in India, here are some benefits of it.
- Insulation: They employ top-notch insulation substances (oil, paper, epoxy) to avoid electrical failures and guarantee enduring reliability.
- Safety Devices: They commonly have safety devices (fuses, relays) to protect against overloads, short circuits, and various faults.
- Sturdy Design: They are designed to endure environmental factors and offer years of dependable performance with less maintenance.
- Compact Design: A single three-phase transformer occupies less space and is more compact than using three single-phase transformers.
- Economical: They tend to be more economical compared to utilizing several single-phase transformers for the equivalent power capacity.
Applications of 3-Phase Step-Down Transformer:
As 3 PH step-down transformer suppliers in India, the following are the applications of 3 PH step-down Transformer in India
- Heavy Machinery
- Manufacturing
- Welding Equipment
- Solar and Wind Power
- Lighting System
- Power Generation Distribution
Being 3 Phase Step Down Transformer manufacturers in India and suppliers in India, Sahara Transformers provides top-notch products promptly to our customers at competitive rates, not just in the areas where we operate directly, but also in regions where we collaborate with our growth partners. Get innovative technology services and solutions at an affordable cost.