Where a three-phase load sits far from the nearest substation, hanging a 3 phase pole mounted transformer from a pole beside the line is often the quickest route to power. Villages, farms, small plants, water-pumping stations and roadside installations all draw current this way. Nothing is poured, fenced or built at ground level, so crews finish sooner and spend less on civil work. Because each unit is made for one location, the capacity can follow the real demand.
Spec Sheet
|
Item |
Specification |
|---|---|
|
Capacity span |
15–333 kVA, other sizes on demand |
|
Mains frequency |
50 or 60 Hz |
|
Line side |
10, 11, 20, 33 or 35 kV; also 7.2, 7.62, 12.47 and 13.8 kV for North American grids |
|
Load side |
0.4 kV, or 208Y/120 V and 480Y/277 V |
|
Winding connection |
Dyn11 or Yyn0; other groupings on demand |
|
Conductor and cooling |
Copper or aluminum coils, ONAN, Class A insulation |
|
Dielectric fluid |
Mineral oil; another fluid on selected ratings, confirmed when you receive the offer |
|
Withstand levels |
24 kV class: 125 kV BIL with 50 kV at power frequency; 35 kV class: 170 kV BIL with 70 kV |
|
Impedance |
about 4.0%–6.0%, settled per size when quoted |
|
Ingress protection |
IP54, upgrade on demand |
|
Working air temperature |
−15 to +40 °C |
|
Design codes |
IEC 60076, IEEE C57.12, CE, with ANSI/IEEE and CSA for pole-top design |
|
Weight, losses, dimensions |
quoted individually |
Sizing the Unit
Begin with the connected three-phase load and its realistic simultaneous demand, not the nameplate total. Allow headroom for growth in the coming years. If large motors will start across the line, say so, since inrush current affects sizing and safeguards. Where small loads are scattered along a feeder, several modest sets can be more practical than one big one.
Conditions That Change the Build
Salt air near a coast, dust, heavy rain, summer heat and cold winters stress pole-top equipment differently. Describe the site and we can specify a thicker anti-corrosion coating and a higher ingress class, plus add-ons such as arrester brackets, fuses, breakers, load-break switches, temperature sensors, metering and a remote-monitoring port. Unusual pole dimensions or terminal layouts can be accommodated.
A self-protecting variant with a built-in primary link and arrester is also offered; whether it suits a three-phase size is checked project by project.
What Keeps It Dependable
-
The lid is held down at several points, which keeps rain out of the oil. If pressure builds inside the tank, a valve opens and then reseats on its own.
-
Core laminations overlap in a step-lap pattern, which keeps losses and hum low, and the coils are arranged low-high-low so heat and fault forces are shared evenly.
-
A dual-voltage design covers impulse and short-circuit duty. Lifting lugs resist slipping when a crew hoists it, and the paint finish protects the tank surface.
Testing
Every set passes routine factory checks before leaving, and temperature-rise, noise and full-wave impulse tests are added when the order calls for them. You may watch the final acceptance test in person or by video. Certificates, the inspection flow and the laboratory are covered on our Quality Control, Certifications and R&D pages.
Utility Supply Record
State Grid's Gansu, Shanxi and Jiangxi companies, plus Inner Mongolia Electric Power (Group), have also taken 10 kV on-column sets from us. Further deliveries are described on the Utilities page and include:
|
State Grid company |
Equipment supplied |
|---|---|
|
Shandong |
Primary-secondary fusion pole circuit breaker |
|
Jiangsu, Shaanxi, Jibei and Anhui |
10 kV oil-immersed transformers |
Delivery and Terms
Normal delivery takes four weeks, and a two-week fast-track slot exists. The warranty covers the whole unit for one year and components for one year, with lifelong maintenance advice. There is no fixed minimum, so a single unit can be ordered. Export packing, optional shock and tilt indicators and shipment tracking are available.
Questions Buyers Ask
Q: When is a 3 phase pole mounted transformer the right choice?
A: When the load is three-phase, such as pumps, motors or machinery, or when the network is three-phase and balance matters. Provide the load type and your utility's requirements and we will confirm the setup.
Q: Can one design serve 50 Hz and 60 Hz grids?
A: Both are covered. Each one is built and tested for the frequency you order.
Q: Can I order just one?
A: Yes. A single custom set is fine.
Q: What details do you need for a price?
A: Voltage on both sides, kVA, frequency, connection group, coil material, applicable code, site climate and any protection or monitoring extras.
Request a Quote
Planning a 3 phase pole mounted transformer purchase? Submit line voltage, load voltage, kVA, frequency, connection group, applicable code and site details through the inquiry form. An engineer will answer with a proposal, delivery schedule and test plan.
Email: chbebgroup@chbeb-ele.com
WhatsApp / Phone: +86 18668091107
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