Transformers

Single-Phase Transformer Equipment

The Single-Phase Transformer Equipment is designed to deliver stable and efficient electrical power where single-phase distribution is required. With a compact structure, simple installation, and reliable performance, this equipment remains a cornerstone in residential communities, rural power grids, and small-scale industrial facilities.

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Unlike three-phase transformers that serve heavy industrial loads, the single-phase transformer is optimized for lower-capacity applications such as residential housing, light commercial facilities, and remote utility poles. Often available as pole-mounted single-phase transformers or pad-mounted distribution units, these devices convert high-voltage electricity to safe, usable low-voltage power.

Our single-phase step-down transformer equipment is manufactured with durable materials, advanced insulation, and energy-efficient cores, ensuring minimal losses and maximum performance. It can be configured as oil-immersed or dry-type, depending on environmental and load requirements.

Main Features

  • Compact and lightweight design suitable for residential use.
  • High efficiency cores for reduced energy loss.
  • Wide voltage range to meet diverse distribution needs.
  • Outdoor-ready enclosures for pole or ground mounting.
  • Quiet operation for residential and commercial environments.
  • Customizable ratings to support unique project specifications.
4.Technical Parameters of 10kV Class SH15-M Series Amorphous Alloy Oil-immersed Transformer
Rated
Capacity
(kVA)		 Voltage
Combination
(KV)		 Low
voltage		 Connecion
group
designation		 Loss(kW) No-load
current
(%)		 Short-
circuit
mpedance
(%)		    Weight(Kg) Overall
Dimensions(mm)
(Length  L×Width  B
×Height H)		 Torque
(Longitudinal/
Transverse)
No-load Load(75℃) Body
Weight		 oil weight Total weight
30 11
10.5
10
6.3
6		 0.4 Dyn11 0.033 0.600 1.7
1.3
1.2
1.1
1.0
0.9
0.7
0.7
0.7
0.5
0.5
0.5		 4 240 80 410  920×600×980 400×550
50 0.043 0.870 310 110 510  950×620×1040 400×550
63 0.050 1.040 350 125 570  990×670×1040 400×550
80 0.060 1.250 410 135 630 1030×720×1040 400×660
100 0.075 1.500 475 150 720 1060×770×1070 400×660
125 0.085 1.800 550 170 830 1060×900×1070 400×660
160 0.100 2.200 630 190 960 1060×930×1150 400×660
200 0.120 2.620 670 210 1040 1110×930×1170 550×820
250 0.140 3.050 750 240 1160 1180×1010×1180 550×820
315 0.170 3.650 810 264 1240 1180×1010×1180 550×820
400 0.200 4.300 860 290 1330 1200×1010×1180 550×820
500 0.240 5.150 950 320 1460 1270×1160×1200 660×1070
630 0.320 6.200 0.3
0.3
0.3
0.2
0.2		 45 1120 380 1860 1450×1240×1330 820×1070
800 0.380 7.500 1340 410 2230 1520×1380×1460 820×1070
1000 0.450 10.30 1620 540 2700 1720×1460×1510 820×1070
7250 0.530 12.00 1900 640 3180 1780×1500×1690 820×1070
1600 0.630 14.50 2560 680 4240 1880×1540×1970 820×1070
2000 0.750 17.40 0.2
0.2		 5 2900 980 4920 2080×1580×1970 820×1070
2500 0.900 20.20 3940 1160 6560 2350×1580×2020 820×1070
Note:High voltage tapping range:±5%or2×2.5%;Frequency:50Hz;Insulation level:L175AC35/L10AC5.

Key Advantages

  • Cost-effective solution for smaller power distribution networks.
  • Easy installation with flexible mounting options.
  • Low maintenance requirements compared to larger units.
  • Energy efficiency reduces long-term operating costs.
  • Safe and reliable power supply for sensitive equipment.

Applications

  • Residential neighborhoods requiring stable single-phase electricity.
  • Rural electrification projects where demand is moderate.
  • Small commercial facilities such as shops, schools, and offices.
  • Renewable energy integration for solar or wind microgrids.
  • Temporary power supply for construction sites or backup systems.

Installation & Maintenance

Installation Steps:

  1. Select a stable mounting position (pole or ground base).
  2. Connect high-voltage input lines and low-voltage output terminals.
  3. Apply proper grounding to ensure safety.
  4. Perform insulation and connection checks before energizing.

Maintenance Tips:

  • Inspect windings and terminals periodically.
  • Monitor insulation resistance for safe operation.
  • Check oil level (if oil-immersed type).
  • Clean external housing to prevent dust accumulation.

How to Choose the Right Single-Phase Transformer

When selecting a transformer, consider:

  • Load demand (kVA rating based on household or facility needs).
  • Voltage compatibility with the grid and end-use equipment.
  • Type of enclosure (pole-mounted vs. pad-mounted).
  • Environmental conditions (dry-type for indoor, oil-immersed for outdoor).
  • Efficiency rating to minimize energy loss.
  • Compliance with IEC/ANSI/local electrical standards.

FAQ

What is a single-phase transformer used for?

It steps down high-voltage electricity to low-voltage power for residential and light commercial applications.

Can single-phase transformers be used outdoors?

Yes, especially pole-mounted or pad-mounted designs with weatherproof enclosures.

What is the typical service life?

With proper maintenance, most units last 20–30 years.

Is oil-immersed or dry-type better?

Oil-immersed offers higher cooling efficiency for outdoor use, while dry-type is safer for indoor installations.

How do I know what size transformer I need?

Size is determined by your total connected load (kVA) and expected peak demand.

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