Single Phase Pole Mounted Distribution Transformer Manufacturer

25kva Single Phase Pole Mounted Distribution Transformer 13.2KV To 240V

A 25kVA single phase pole mounted distribution transformer is a compact, oil-filled transformer designed to step down medium-voltage feeder lines (commonly 13.2 kV primary in many networks) to a usable low-voltage secondary (240 V line-to-line or 120/240 V split-phase) for homes, small businesses, and rural loads. These units are mounted on utility poles to minimize infrastructure cost, reduce low-voltage line length, and deliver reliable power where padmounts or underground distribution are impractical.

Why operators choose single-phase pole-mounted transformers

Lower cost — since they’re mounted on poles, there’s no need for concrete pads or long low-voltage lines, which saves on construction work and land use.
Less energy loss — placing the transformer closer to where the power is needed shortens the LV line, often cutting losses by 40–60% compared to centralised systems.
Compact and easy to maintain — their small size and simple design make inspection and servicing straightforward.
Flexible options — they can use mineral or eco-friendly oils, and different types of bushings (porcelain or polymer) to suit various needs.
Because of these benefits, a 25kVA single-phase transformer works especially well for rural lines, small business areas, street lighting, and farm pumping stations.

Detail Information

Place of Origin:	CHINA	Primary Voltage:	13200GrdY/7620
Certification:	CE,ISO	Secondary Voltage:	120/240V (L-N-L)
Transformer Type:	Pole Mounted	Phase:	Single Phase
Capacity:	25 KVA Or Customized	Winding Material:	Copper
Cooling Method:	ONAN/KNAN	Supply Ability:	1000set/month
Temperature Rise:	65°C
Highlight:	Pole Mounted Distribution Transformer, 25kva Pole Mounted Distribution Transformer, Single Phase Transformer 13.2KV Product Description

Main data

Transformer Type	Overhead Distribution Transformer, Conventional Type
Transformer Configuration	Liquid Filled Pole Mounted
Transformer Polarity Type	Subtractive
Phase	Single Phase
Capacity	25 KVA
Primary Voltage	13200GrdY/7620
Primary Voltage Class	15 kV Class
Primary BIL	95 kV
Secondary Voltage	120/240V (L-N-L)
Secondary BIL	30 KV
Frequency	60 Hz
Temperature Rise	65°C
Insulation Rating	Class E Insulation – 120°C, 248°F
Cooling Class	ONAN; Self-Cooled
Tap Changer	5-Position Tap Changer w/ External Operating Handle
Tap Qty	(2) FCAN Above, (2) FCBN Below
Tap %	2.5%
Tap Changer Switch Location	Middle of Tank Body, Left of Mounting Provisions
Impedance	2.5% Typical
Fluid Weight*	99.21 lb
Winding Material	Copper
Ambient Temperature Rating	40°C
Sound Level	48 dBA
Dimensions*	21.65”-W x 24.8”-D x 40.16”-H
Total Weight (Liquid Filled)*	470 lb

Specifications

10kva-500kva Single-phase oil immersed transformer
Rated Cap acity(kVA)	High	Low Voltage(v)	Connection Symbol	Standard	Short-circuit impedance(%)	Efficiency
Rated Cap acity(kVA)	Voltage(v)	Low Voltage(v)	Connection Symbol	Standard	Short-circuit impedance(%)	(%)
10	4160 7200 12000 12470 13200 13800 19920 24940 34500	110 220 230 400 480	II0,II6	IEEE/ANSI/ DOE	1.8-4%	98.7
15						98.82
25						98.95
37.5						99.05
50						99.11
75						99.19
100						99.25
167						99.33
250						99.39
333						99.43
500						99.49

FAQ

Q1 — Can a 25kVA single-phase pole transformer supply a small village or a few homes?
Yes. In many rural setups, one 25kVA pole transformer can support several households or a small cluster of shops. This helps shorten low-voltage lines and keeps customer voltage more stable. Final sizing should be checked against actual peak load.

Q2 — Can pole transformers use biodegradable insulating oil?
Yes. Many modern pole units can use ester-based biodegradable oils, which are more eco-friendly and recommended near water or in areas with spill risks. Always confirm oil compatibility and temperature performance with the manufacturer.

Q3 — What’s the usual delivery time and warranty?
It depends on order size and customization, but mass production usually takes 15–25 days. Warranties are commonly 12–24 months. TRONKI provides 12 months plus technical support for accessory replacement if needed.