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Transformers（Number of phases/winding：Three-phase/double-winding）
A transformer is a device that changes the voltage, also called a power transformer. Performs the step-down and step-up of AC voltage, and makes adjustments necessary for use in electronic devices. The transformer has a structure in which a primary coil and a secondary coil are wound around an iron core. Depending on the position of the iron core and the coil, it is divided into an inner iron type where the coil covers the iron core and an outer iron type where the iron core is outside the coil. Wiring methods are classified into two types: single-phase, which is a 100 V power supply used in offices, and three-phase, which is a 200 V power supply that sends a large amount of power. The winding of the coil is usually compound wound in which the primary and secondary sides are insulated, but there are also smaller auto transformers. There are also types that can be connected with the cover attached, types that can be used overseas and in Japan, portable types that are suitable for on-site construction with different power and voltage, etc.
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Reverse V Transformer, 3SV Series
SWALLOW ELECTRIC
3SV can change from three-phase to single-phase. Terminal block has color cords to avoid faulty wiring. (To 5KVA)
Primary voltage(V) Capacity(kVA) Secondary voltage(V) Number of phases/winding Insulation type Input/output terminal shape Dimension vertical(mm) Shield presence With/without Case Dimension width(mm) Dimension depth(mm) AC200 0.5 ～ 1 AC100 Three-phase/double-winding A type Other 190 ～ 260 NA NA 210 ～ 250 150 From: ₹ 27,961.18 Days to Ship: 5 Day(s) or more 
5 Day(s) or more
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| Product Series |
| From |
| Days to Ship |
| Primary voltage(V) |
| Capacity(kVA) |
| Secondary voltage(V) |
| Number of phases/winding |
| Insulation type |
| Input/output terminal shape |
| Dimension vertical(mm) |
| Shield presence |
| With/without Case |
| Dimension width(mm) |
| Dimension depth(mm) |
You can add up to 6 items per a category to the compare list.  | |
| Brand | SWALLOW ELECTRIC |
| Product Series | |
| From | ₹ 27,961.18 |
| Days to Ship | 5 Day(s) or more |
| Primary voltage(V) | AC200 |
| Capacity(kVA) | 0.5 ～ 1 |
| Secondary voltage(V) | AC100 |
| Number of phases/winding | Three-phase/double-winding |
| Insulation type | A type |
| Input/output terminal shape | Other |
| Dimension vertical(mm) | 190 ～ 260 |
| Shield presence | NA |
| With/without Case | NA |
| Dimension width(mm) | 210 ～ 250 |
| Dimension depth(mm) | 150 |
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Specification/Dimensions
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Primary voltage(V)
- AC0-380-400-440
- 0-200
- AC0-200-210-220
- 100
- AC100
- AC100-220
- AC100-200
- AC100-120-200-220-240
- AC100-110
- AC100-110-120
- AC100-110-120-200-220-240
- AC100-110-120-200-220-230-240
- AC110 to 130
- AC110 to 240
- AC170 to 260
- AC180-200-220
- AC190-200-210
- AC190-200-210-220-230-240
- 200
- AC200
- AC200-220
- AC200-220-240
- AC200-220-230-240
- 220
- AC220
- 220-200-0
- AC220 to 230
- AC220 to 240
- 240
- AC240
- 380
- AC380-400-440
- AC380-400-420-440-460-480
- AC380-400-415-440
- 420
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Capacity(kVA)
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Secondary voltage(V)
- AC0-200-220
- 0-100
- AC0-100-105-110
- AC6-8-10-12
- AC10-12
- AC12
- AC12-15-20-24
- AC14-16-18-20
- 24
- AC24
- AC24-32-35-38
- 28
- 100
- AC100
- AC100-120-200-220-240
- AC100-115
- AC100-115-200
- AC100-110
- AC100-110-120
- AC100-110-120-200-220-240
- AC100-110-120-200-220-230-240
- AC100-110-115
- 110
- 110-100-0
- 115
- 117
- AC120
- 200
- AC200
- AC200-220
- AC200-220-240
- AC200-220-230-240
- 220
- AC220 to 230
- 235
- AC240
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Number of phases/winding
- Single-phase/single-winding
- Single-phase/Double-winding
- Three-phase/double-winding
- Other
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Insulation type
- A type
- E Type
- B Type
- F type
- H type
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Input/output terminal shape
- Screw terminal block
- Up screw type terminal block
- Other
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Dimension vertical(mm)
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Shield presence
- Available
- NA
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With/without Case
- Available
- NA
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Dimension width(mm)
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Dimension depth(mm)
Related Categories to Transformers
FAQ Transformers
- Question: What is the difference between 1 phase transformers and 3 phase transformers.
- Answer: 1. In a single-phase transformer, the electricity is supplied through two wires called Line and neutral. In three phase transformers, the electricity is supplied through three wires (four wires if neutral wire is included).
2. The voltage of single-phase transformer supply is 230V whereas three-phase transformer supply is 415V.
3. The efficiency of a three-phase transformer is significantly higher than a single-phase supply and the power transfer capability is also more. - Question: How many types of transformers?
- Answer: Type of transformer can be separated by different types of applications.
1. Transformer types based on core structure.
1.1) Iron core transformer
1.2) Shell core transformer
1.3) H-type core transformer
2. Transformer types based on electric system.
2.1) Single-phase transformer
2.2) Three-phase transformer
3. Transformer types based on voltage level.
3.1) Step-up transformer which is use for boost voltage up then transmit to secondary side.
3.2) Step-down transformer which is use for reducing voltage down then transmit to secondary side.
3.3) Isolation transformer which voltage at primary and secondary side are same. Typically, applicable for Laboratory which is need stable voltage and current. - Question: What is transformer maintenance method?
- Answer: 1. Should install and using in low-humidity to prevent short circuit issue.
2. Installation place should be good for heat transfer.
3. Always keep cleaning heat transfer component.
4. Always keep inspection terminal and wire. - Question: Why transformer is necessary?
- Answer: Transformers is necessary because each electric device need different level of voltage. So, we must use transformer to adjust the electrical voltage from power source to sub-unit. Such as, reduce voltage from high-power electric post to the building and transformer for reduce voltage level from electric source of building to each electrical home appliance as well.
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